APM Java Agent:Start up Error

HI, I'm trying to setup an APM Agent for a java applicaiton ( Spring 5, Webflux ).
I got this message when staring an application with apm java agent.

bash-4.1# java -javaagent:/home/elastic-apm-agent-1.1.0.jar -Delastic.apm.service_name=webflux-demo -Delastic.apm.application_packages=com.azoci.demo.webfluxdemo -Delastic.apm.server_urls= -jar webflux-demo-0.0.1-SNAPSHOT.jar
2018-12-13 02:07:19.841 [apm-server-healthcheck] INFO co.elastic.apm.report.ApmServerHealthChecker - Elastic APM server is available: {"ok":{"build_date":"2018-11-29T22:56:26Z","build_sha":"ea0bf4863f638b35ecb6ced94f02015bab8bcb47","version":"6.5.2"}}
2018-12-13 02:07:19.911 [main] INFO co.elastic.apm.configuration.StartupInfo - Starting Elastic APM 1.1.0 as webflux-demo on Java 1.8.0_11 (Oracle Corporation) Linux 3.10.0-693.17.1.el7.x86_64

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:: Spring Boot :: (v2.1.1.RELEASE)

2018-12-13 02:07:22.230 INFO 1043 --- [ main] c.a.d.w.WebfluxDemoApplication : Starting WebfluxDemoApplication v0.0.1-SNAPSHOT on 242d1917bcb8 with PID 1043 (/home/webflux-demo-0.0.1-SNAPSHOT.jar started by root in /home)
2018-12-13 02:07:22.257 INFO 1043 --- [ main] c.a.d.w.WebfluxDemoApplication : No active profile set, falling back to default profiles: default

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x00007fa33f257db1, pid=1043, tid=140339139184384

JRE version: Java(TM) SE Runtime Environment (8.0_11-b12) (build 1.8.0_11-b12)

Java VM: Java HotSpot(TM) 64-Bit Server VM (25.11-b03 mixed mode linux-amd64 compressed oops)

Problematic frame:

V [libjvm.so+0x4bddb1] Deoptimization::query_update_method_data(MethodData*, int, Deoptimization::DeoptReason, unsigned int&, bool&, bool&)+0x31

Core dump written. Default location: /home/core or core.1043

An error report file with more information is saved as:


If you would like to submit a bug report, please visit:


Aborted (core dumped)

plz, help me solve this problem.

Hi, and thanks for trying out our APM solution.
I found this bug report that seems very similar- looks like your Java version has some problem with some specific ASM instrumentation.
If you want to look further into this, here are few things I can suggest trying:

  1. Try upgrade the java version (even stay with 8, but take the latest)
  2. Configure the agent to DEBUG logging level. Not only it may provide us with more info, but it will enforce some additional bytecode inspection on instrumented classes.
  3. Try disabling specific parts of the instrumentation through this configuration and see if it is only related to a specific part. For example- disable half and see if problem is resolved, then narrow down. If there is a specific instrumentation label that causes that- we will be glad to know.

In any case, it says

An error report file with more information is saved as:

Try to find such error report and attach.


Also note that we don't have auto-instrumentation for Spring WebFlux yet.

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