# Application is down

**URL:** <https://discuss.elastic.co/t/application-is-down/252309>\
**Category:** APM\
**Tags:** java\
**Created:** [October 16, 2020, 7:27am UTC](https://discuss.elastic.co/t/application-is-down/252309 "2020-10-16T07:27:05Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [October 16, 2020, 7:27am UTC](https://discuss.elastic.co/t/application-is-down/252309/1 "2020-10-16T07:27:05Z")

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I use both java agent and java agent public in app,and deploy in jboss.But after a few minutes.The app is down.

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**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:** [October 16, 2020, 7:47am UTC](https://discuss.elastic.co/t/application-is-down/252309/2 "2020-10-16T07:47:14Z")

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Hi, do you have a crash report for the JVM ? There should be a `hs_err_pid_xxx` in `/tmp` folder.

Also, we recently discovered that some Java7 JVMs tend to crash when G1GC garbage collector is enabled, in the future agent will self-disable to prevent such crashes ([https://github.com/elastic/apm-agent-java/pull/1440](https://github.com/elastic/apm-agent-java/pull/1440)). G1GC was an experimental feature in Java7 and has been made GA and usable by default only on Java9.

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**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:** [October 16, 2020, 7:57am UTC](https://discuss.elastic.co/t/application-is-down/252309/3 "2020-10-16T07:57:39Z")

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Also, could you provide the agent configuration that you are using ?

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [October 16, 2020, 8:18am UTC](https://discuss.elastic.co/t/application-is-down/252309/4 "2020-10-16T08:18:37Z")

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Yes,that's follow and have some solutions?

```auto
    export JAVA_OPTS="$JAVA_OPTS -javaagent:/opt/app/elk/elastic-apm-agent-1.16.0.jar"
    export JAVA_OPTS="$JAVA_OPTS -Delastic.apm.service_name=jboss-service"
    export JAVA_OPTS="$JAVA_OPTS -Delastic.apm.application_packages=com.*"
    export JAVA_OPTS="$JAVA_OPTS -Delastic.apm.server_urls=http://xx.xx.xx.xx:8200"

```

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<div class="post-metadata">

**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [October 16, 2020, 8:24am UTC](https://discuss.elastic.co/t/application-is-down/252309/5 "2020-10-16T08:24:11Z")

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Thus,We use jdk1.7 and use ParallelGC

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**Author:** ![Eyal\_Koren](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eyal_koren/32/36830_2.png) [@Eyal\_Koren](https://discuss.elastic.co/u/Eyal_Koren)\
**Post date:** [October 19, 2020, 7:12am UTC](https://discuss.elastic.co/t/application-is-down/252309/6 "2020-10-19T07:12:18Z")

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> [@hyhong](#):
>
> We use jdk1.7 and use ParallelGC

Do you set it explicitly, or is it the default? If not the default, try without this setting.

Another thing to try is upgrade to the latest Java 7, if you are not using it already.

Not much we can do without the crash log and without the full command line you are using.

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<div class="post-metadata">

**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [October 19, 2020, 8:22am UTC](https://discuss.elastic.co/t/application-is-down/252309/7 "2020-10-19T08:22:55Z")

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I use ByteBuddy+Java Agent public API implement a customer plugin.And it's ok in test enviroment.But it's crash in prod enviroment.Some suggestions?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 9, 2020, 4:23am UTC](https://discuss.elastic.co/t/application-is-down/252309/8 "2020-11-09T04:23:03Z")

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