# ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!

**URL:** <https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589>\
**Category:** APM\
**Tags:** docker, java, server, agent-explorer\
**Created:** [July 4, 2023, 7:33pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589 "2023-07-04T19:33:39Z")\
**Posts on this page:** 13\
**Page:** 1

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 4, 2023, 7:33pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/1 "2023-07-04T19:33:39Z")

</div>

**Kibana version** : 8.6.0

**Elasticsearch version** : 8.6.0

**APM Server version** : 8.6.0

**APM Agent language and version** : 1.36.0

**Original install method (e.g. download page, yum, deb, from source, etc.) and version**: Docker stack from registry

**Fresh install or upgraded from other version?** Fresh install

**Is there anything special in your setup?** Nothing in specific

**Description of the problem including expected versus actual behavior. Please include screenshots (if relevant)**:  
I'm running a java wildfly application with elastic apm agent and I got no transactions in APM, only errors are showing in error panel.

Searching in discovery, filtering to not show errors, I can see some transactions with span id and transaction id, but I believe it is not complete, apparently.

I enabled debug to try to see more details and I got it in log:

```plaintext
[INFO]2023-07-03 17:38:47,684 [default task-11] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - decrement references to 'POST /omitted/{id}' 00-71dded60c426f650e284369cf7e28ad5-0351617688689cfd-01 (3899fe1c) (6)
[INFO]2023-07-03 17:38:47,685 [default task-11] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - decrement references to 'KafkaProducer#send to omitted' 00-71dded60c426f650e284369cf7e28ad5-0586c9d4c5b85112-01 (4162bd52) (1)
17:38:47,686 INFO [stdout] (default task-7) 2023-07-03 17:38:47,686 [default task-7] DEBUG co.elastic.apm.agent.servlet.ServletTransactionHelper - Empty servlet path fallback applied. requestURI = /omitted/40358242, contextPath = /omitted/, servletPath = , pathInfo = /omitted/40358242
17:38:47,686 INFO [stdout] (default task-7) 2023-07-03 17:38:47,686 [default task-7] ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!
17:38:47,686 INFO [stdout] (default task-7) java.lang.StringIndexOutOfBoundsException: String index out of range: -1
17:38:47,686 INFO [stdout] (default task-7) at java.lang.String.substring(String.java:1967) ~[?:1.8.0_302]
17:38:47,686 INFO [stdout] (default task-7) at co.elastic.apm.agent.servlet.ServletTransactionHelper.normalizeServletPath(ServletTransactionHelper.java:216) ~[elastic-apm-agent.jar:1.37.0]
17:38:47,686 INFO [stdout] (default task-7) at co.elastic.apm.agent.servlet.ServletApiAdvice.onExitServlet(ServletApiAdvice.java:249) ~[elastic-apm-agent.jar:1.37.0]
17:38:47,686 INFO [stdout] (default task-7) at co.elastic.apm.agent.servlet.JavaxServletApiAdvice.onExitServletService(JavaxServletApiAdvice.java:45) ~[elastic-apm-agent.jar:1.37.0]
17:38:47,686 INFO [stdout] (default task-7) at javax.servlet.http.HttpServlet.service(HttpServlet.java:791) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar!/:1.0.0.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,686 INFO [stdout] (default task-7) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:62) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
17:38:47,687 INFO [stdout] (default task-7) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_302]
17:38:47,687 INFO [stdout] (default task-7) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_302]
17:38:47,687 INFO [stdout] (default task-7) at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302]
17:38:47,691 INFO [stdout] (elastic-apm-server-reporter) 2023-07-03 17:38:47,691 [elastic-apm-server-reporter] DEBUG co.elastic.apm.agent.report.IntakeV2ReportingEventHandler - Receiving ERROR event (sequence 183)

```

This error apparently is on java agent and in all my tests, I can't to solve it.

This is my agent running configuration:

```plaintext
-javaagent:/elastic-apm-agent.jar
	-Delastic.apm.service_name=api-omitted
	-Delastic.apm.server_urls=https://abc.apm.xxx
	-Delastic.apm.secret_token=omitted
	-Delastic.apm.environment=production
	-Delastic.apm.application_packages=omitted
	-Delastic.apm.include_process_args=true
	-Delastic.apm.global_labels=app=omitted,tier=api
	-Delastic.apm.capture_headers=true
	-Delastic.apm.use_path_as_transaction_name=true
	-Delastic.apm.transaction_ignore_urls=/metrics,/prometheus,*/metrics,*/health,*/health/*,*/prometheus,*/prometheus/*,*/actuator,*/actuator/*,*/alive,*/alive/*
	-Delastic.apm.use_jaxrs_path_as_transaction_name=true
	-Delastic.apm.circuit_breaker_enabled=false
	-Delastic.apm.classes_excluded_from_instrumentation=org.jboss.*,io.undertow.*
	-Delastic.apm.enable_type_pool_cache=false
	-Delastic.apm.central_config=true
	-Delastic.apm.log_level=ERROR

```

The classes\_excluded\_from\_instrumentation argument is just here to test. The application is running with this argument now.

Is there any way to find out which class or what the problem is?

Thank you all.

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 5, 2023, 8:25am UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/2 "2023-07-05T08:25:02Z")

</div>

Hi, thanks for reporting this @miguel.longo , this definitely looks like a corner case where there is a bug in the agent. Thanks to the provided logs I've managed to reproduce it locally thus I should be able to fix it quickly.

I'll keep you posted on the progress on fixing this.

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 5, 2023, 9:19am UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/3 "2023-07-05T09:19:00Z")

</div>

I've found and fixed the issue in [Fix servlet path normalization by SylvainJuge · Pull Request #3222 · elastic/apm-agent-java · GitHub](https://github.com/elastic/apm-agent-java/pull/3222).

Can you try to validate with this [agent snapshot](https://github.com/elastic/apm-agent-java/suites/14070646493/artifacts/786525584) that the fix is effective and works as expected in your application ?

If that's ok, it means this fix could be included in the next agent release (make sure to subscribe to notifications to get notified when it's available).

---

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 5, 2023, 12:51pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/4 "2023-07-05T12:51:28Z")

</div>

Hi @Sylvain_Juge!

Thanks for the quick response, and sorry for the delay.

I applied the snapshot and the behavior is apparently the same.

The log shows the same error. I will send the log file directly to you.

---

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 5, 2023, 7:50pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/5 "2023-07-05T19:50:43Z")

</div>

Hi @Sylvain_Juge,

We fixed all the SQL errors. Now, the application is running normally and the log file I sent you inbox can be ignored.

However, java agent still prints the same errors and don't show transactions in APM.

I'm still get data from discovery from this service.

Regards.

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 6, 2023, 7:21am UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/6 "2023-07-06T07:21:36Z")

</div>

Hi, I'm a bit confused here.

- are you using the the provided snapshot agent ?
- does this snapshot allows to avoid the exception you had with `StringIndexOutOfBoundsException` thrown from `ServletTransactionHelper.normalizeServletPath` method ? (if yes, then that means we have at least one minor bugfix ready to ship).

If you still don't have any transactions, then maybe removing the `classes_excluded_from_instrumentation` configuration could help here.

If this configuration change is not enough, then capturing the agent debug logs using [this procedure](https://www.elastic.co/guide/en/apm/agent/java/current/trouble-shooting.html#trouble-shooting-logging-procedure) is the way to go, you can still send me the log file in DM if you prefer.

---

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 6, 2023, 12:08pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/7 "2023-07-06T12:08:23Z")

</div>

Hi Sylvain,

**are you using the the provided snapshot agent ?**  
Yes. In this part of log, you can see the agent version with your snapshot: `~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]`.

Log below.

**does this snapshot allows to avoid the exception you had with `StringIndexOutOfBoundsException` thrown from `ServletTransactionHelper.normalizeServletPath` method ?**  
Unfortunately not. As you can see in the log below, the same "error" still happens.

```plaintext
18:12:15,151 INFO [stdout] (default task-11) 2023-07-05 18:12:15,073 [default task-10] ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!
18:12:15,152 INFO [stdout] (default task-11) java.lang.StringIndexOutOfBoundsException: String index out of range: -1
18:12:15,152 INFO [stdout] (default task-11) at java.lang.String.substring(String.java:1967) ~[?:1.8.0_302]
18:12:15,152 INFO [stdout] (default task-11) at co.elastic.apm.agent.servlet.ServletTransactionHelper.normalizeServletPath(ServletTransactionHelper.java:217) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
18:12:15,152 INFO [stdout] (default task-11) at co.elastic.apm.agent.servlet.ServletApiAdvice.onExitServlet(ServletApiAdvice.java:248) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
18:12:15,152 INFO [stdout] (default task-11) at co.elastic.apm.agent.servlet.JavaxServletApiAdvice.onExitServletService(JavaxServletApiAdvice.java:45) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
18:12:15,152 INFO [stdout] (default task-11) at javax.servlet.http.HttpServlet.service(HttpServlet.java:791) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar!/:1.0.0.Final]
18:12:15,152 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,152 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,152 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,152 INFO [stdout] (default task-11) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
18:12:15,152 INFO [stdout] (default task-11) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,153 INFO [stdout] (default task-11) at io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:62) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
18:12:15,154 INFO [stdout] (default task-11) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_302]
18:12:15,154 INFO [stdout] (default task-11) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_302]
18:12:15,154 INFO [stdout] (default task-11) at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302]

```

I removed the `classes_excluded_from_instrumentation` like you mentioned, but the behavior is the same.

I will get the trace log and send to you in DM.

Sorry for the confusion. I figured by fixing the application problem, I could possibly fix the agent problem as well, and it is not happened.

Thank you for your help and support.

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 6, 2023, 1:01pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/8 "2023-07-06T13:01:29Z")

</div>

In the previous log that you provided, there was a line containing `DEBUG co.elastic.apm.agent.servlet.ServletTransactionHelper` which provides the parameter values that are triggering the exception in `normalizeServletPath`.

Could you provide the few lines that precede this stack trace in the logs ?

---

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 6, 2023, 1:24pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/9 "2023-07-06T13:24:15Z")

</div>

These logs?

```plaintext
09:36:37,102 INFO [stdout] (default task-8) 2023-07-05 09:36:37,102 [default task-8] DEBUG co.elastic.apm.agent.servlet.ServletTransactionHelper - Empty servlet path fallback applied. requestURI = /api-saude-outbox-process/processEvent/40890466, contextPath = /api-saude-outbox-process/, servletPath = , pathInfo = /processEvent/40890466
09:36:37,102 INFO [stdout] (default task-10) 2023-07-05 09:36:37,102 [default task-10] DEBUG co.elastic.apm.agent.servlet.ServletTransactionHelper - Empty servlet path fallback applied. requestURI = /api-saude-outbox-process/processEvent/40890594, contextPath = /api-saude-outbox-process/, servletPath = , pathInfo = /processEvent/40890594
09:36:37,102 INFO [stdout] (default task-9) 2023-07-05 09:36:37,102 [default task-9] DEBUG co.elastic.apm.agent.servlet.ServletTransactionHelper - Empty servlet path fallback applied. requestURI = /api-saude-outbox-process/processEvent/40890606, contextPath = /api-saude-outbox-process/, servletPath = , pathInfo = /processEvent/40890606
09:36:37,118 INFO [stdout] (default task-13) 2023-07-05 09:36:37,118 [default task-13] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - increment references to '' 00-61cb4b1a1f3a6f4033365ea2cfd77b07-b10404cfc411f6f4-01 (5551bad4) (1)
09:36:37,118 INFO [stdout] (default task-13) 2023-07-05 09:36:37,118 [default task-13] DEBUG co.elastic.apm.agent.impl.ElasticApmTracer - startTransaction '' 00-61cb4b1a1f3a6f4033365ea2cfd77b07-b10404cfc411f6f4-01 (5551bad4)
09:36:37,118 INFO [stdout] (default task-13) 2023-07-05 09:36:37,118 [default task-13] DEBUG co.elastic.apm.agent.impl.ActiveStack - Activating '' 00-61cb4b1a1f3a6f4033365ea2cfd77b07-b10404cfc411f6f4-01 (5551bad4) on thread 228
09:36:37,118 INFO [stdout] (default task-13) 2023-07-05 09:36:37,118 [default task-13] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - increment references to '' 00-61cb4b1a1f3a6f4033365ea2cfd77b07-b10404cfc411f6f4-01 (5551bad4) (2)
09:36:37,122 INFO [stdout] (default task-14) 2023-07-05 09:36:37,122 [default task-14] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - increment references to '' 00-17260e468f2a71f8ca9261bd2c31308b-eaba227fc892d377-01 (19d2d322) (1)
09:36:37,123 INFO [stdout] (default task-14) 2023-07-05 09:36:37,122 [default task-14] DEBUG co.elastic.apm.agent.impl.ElasticApmTracer - startTransaction '' 00-17260e468f2a71f8ca9261bd2c31308b-eaba227fc892d377-01 (19d2d322)
09:36:37,123 INFO [stdout] (default task-14) 2023-07-05 09:36:37,123 [default task-14] DEBUG co.elastic.apm.agent.impl.ActiveStack - Activating '' 00-17260e468f2a71f8ca9261bd2c31308b-eaba227fc892d377-01 (19d2d322) on thread 229
09:36:37,123 INFO [stdout] (default task-14) 2023-07-05 09:36:37,123 [default task-14] DEBUG co.elastic.apm.agent.impl.transaction.AbstractSpan - increment references to '' 00-17260e468f2a71f8ca9261bd2c31308b-eaba227fc892d377-01 (19d2d322) (2)
09:36:37,125 INFO [stdout] (default task-7) 2023-07-05 09:36:37,125 [default task-7] DEBUG co.elastic.apm.agent.bci.IndyPluginClassLoaderFactory - Creating plugin class loader for ModuleClassLoader for Module "org.jboss.log4j.logmanager:main" from local module loader @55040f2f (finder: local module finder @64c87930 (roots: /opt/jboss/wildfly/modules,/opt/jboss/wildfly/modules/system/layers/base/.overlays/layer-base-wildfly-9.0.2-Final-hibernate-validator-5.2.0-Final,/opt/jboss/wildfly/modules/system/layers/base)) containing [co.elastic.apm.agent.loginstr.AbstractLogIntegrationInstrumentation, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$3, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$LazyEntry, co.elastic.apm.agent.loginstr.correlation.AbstractLogCorrelationHelper$DefaultLogCorrelationHelper, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$1, co.elastic.apm.agent.loginstr.correlation.package-info, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$TraceIdentifierEntrySet$1, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$2, co.elastic.apm.agent.loginstr.correlation.CorrelationIdMapAdapter$TraceIdentifierEntrySet, co.elastic.apm.agent.loginstr.package-info, co.elastic.apm.agent.loginstr.error.LoggerErrorHelper, co.elastic.apm.agent.loginstr.error.package-info, co.elastic.apm.agent.loginstr.error.AbstractLoggerErrorCapturingInstrumentation$LoggingAdvice, co.elastic.apm.agent.loginstr.error.AbstractLoggerErrorCapturingInstrumentation, co.elastic.apm.agent.loginstr.LoggingPluginClassLoaderRootPackageCustomizer, co.elastic.apm.agent.loginstr.reformatting.package-info, co.elastic.apm.agent.loginstr.reformatting.Utils, co.elastic.apm.agent.bci.classloading.LookupExposer]
09:36:37,128 INFO [stdout] (default task-9) 2023-07-05 09:36:37,102 [default task-9] ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!
09:36:37,128 INFO [stdout] (default task-9) java.lang.StringIndexOutOfBoundsException: String index out of range: -1
09:36:37,192 INFO [stdout] (default task-9) at java.lang.String.substring(String.java:1967) ~[?:1.8.0_302]
09:36:37,192 INFO [stdout] (default task-9) at co.elastic.apm.agent.servlet.ServletTransactionHelper.normalizeServletPath(ServletTransactionHelper.java:217) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,192 INFO [stdout] (default task-9) at co.elastic.apm.agent.servlet.ServletApiAdvice.onExitServlet(ServletApiAdvice.java:248) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,192 INFO [stdout] (default task-9) at co.elastic.apm.agent.servlet.JavaxServletApiAdvice.onExitServletService(JavaxServletApiAdvice.java:45) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,192 INFO [stdout] (default task-9) at javax.servlet.http.HttpServlet.service(HttpServlet.java:791) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar!/:1.0.0.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,192 INFO [stdout] (default task-9) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:62) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,193 INFO [stdout] (default task-9) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_302]
09:36:37,193 INFO [stdout] (default task-9) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_302]
09:36:37,193 INFO [stdout] (default task-9) at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302]
09:36:37,195 INFO [stdout] (default task-10) 2023-07-05 09:36:37,103 [default task-8] ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!
09:36:37,196 INFO [stdout] (default task-10) java.lang.StringIndexOutOfBoundsException: String index out of range: -1
09:36:37,197 INFO [stdout] (default task-10) at java.lang.String.substring(String.java:1967) ~[?:1.8.0_302]
09:36:37,197 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.ServletTransactionHelper.normalizeServletPath(ServletTransactionHelper.java:217) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,198 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.ServletApiAdvice.onExitServlet(ServletApiAdvice.java:248) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,198 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.JavaxServletApiAdvice.onExitServletService(JavaxServletApiAdvice.java:45) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,198 INFO [stdout] (default task-10) at javax.servlet.http.HttpServlet.service(HttpServlet.java:791) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar!/:1.0.0.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:62) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,199 INFO [stdout] (default task-10) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_302]
09:36:37,199 INFO [stdout] (default task-10) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_302]
09:36:37,199 INFO [stdout] (default task-10) at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302]
09:36:37,199 INFO [stdout] (default task-10) 2023-07-05 09:36:37,102 [default task-10] ERROR co.elastic.apm.agent.bci.IndyBootstrap - Advice threw an exception, this should never happen!
09:36:37,200 INFO [stdout] (default task-10) java.lang.StringIndexOutOfBoundsException: String index out of range: -1
09:36:37,200 INFO [stdout] (default task-10) at java.lang.String.substring(String.java:1967) ~[?:1.8.0_302]
09:36:37,200 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.ServletTransactionHelper.normalizeServletPath(ServletTransactionHelper.java:217) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,200 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.ServletApiAdvice.onExitServlet(ServletApiAdvice.java:248) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,200 INFO [stdout] (default task-10) at co.elastic.apm.agent.servlet.JavaxServletApiAdvice.onExitServletService(JavaxServletApiAdvice.java:45) ~[elastic-apm-agent.jar:1.39.1-SNAPSHOT]
09:36:37,200 INFO [stdout] (default task-10) at javax.servlet.http.HttpServlet.service(HttpServlet.java:791) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar!/:1.0.0.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) [wildfly-undertow-9.0.2.Final.jar!/:9.0.2.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:62) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) [undertow-servlet-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) [undertow-core-1.2.9.Final.jar!/:1.2.9.Final]
09:36:37,200 INFO [stdout] (default task-10) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_302]
09:36:37,200 INFO [stdout] (default task-10) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_302]
09:36:37,200 INFO [stdout] (default task-10) at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302]
[INFO]2023-07-05 09:36:37,198 [default task-13] DEBUG co.elastic.apm.agent.impl.transaction.Span - startSpan '' 00-61cb4b1a1f3a6f4033365ea2cfd77b07-9f8c341c020c8c72-01 (363ec26f)

```

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 6, 2023, 3:01pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/10 "2023-07-06T15:01:17Z")

</div>

Perfect, I did not noticed the extra `/` at the end of the context path that still triggers the issue:

```auto
requestURI = /api-saude-outbox-process/processEvent/40890606
contextPath = /api-saude-outbox-process/ <----- this is where I missed the extra / in context path
servletPath =
pathInfo = /processEvent/40890606

```

I've updated the tests in and it should be better now.

Could you try to validate with [this snapshot](https://github.com/elastic/apm-agent-java/suites/14109015150/artifacts/789456482) and tell me if that fixes it for good now ?

---

<div class="post-metadata">

**Author:** ![miguel.longo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/miguel.longo/32/119522_2.png) [@miguel.longo](https://discuss.elastic.co/u/miguel.longo)\
**Post date:** [July 6, 2023, 5:08pm UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/11 "2023-07-06T17:08:37Z")

</div>

It's perfect now! I can see all transactions without problems.

I changed the log level to try to find some error, but it's all clean.

Thanks, Sylvain!

---

<div class="post-metadata">

**Author:** ![Sylvain\_Juge](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain_juge/32/55521_2.png) [@Sylvain\_Juge](https://discuss.elastic.co/u/Sylvain_Juge)\
**Post date:** [July 7, 2023, 6:51am UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/12 "2023-07-07T06:51:37Z")

</div>

Perfect! Thanks again for reporting this, we will likely include the bugfix to the next release.  
Make sure to subscribe to notifications on github so you know when to update.

Have a good day!

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 4, 2023, 6:52am UTC](https://discuss.elastic.co/t/error-co-elastic-apm-agent-bci-indybootstrap-advice-threw-an-exception-this-should-never-happen/337589/13 "2023-08-04T06:52:01Z")

</div>

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