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https://issues.apache.org/jira/browse/FELIX-5665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119378#comment-16119378
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ASF GitHub Bot commented on FELIX-5665:
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GitHub user anilutcs opened a pull request:
https://github.com/apache/felix/pull/116
Terminate class load for sun.reflect.GeneratedMethodAccessor* when the
property is set
Refer to https://issues.apache.org/jira/browse/FELIX-5665 for more details.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/anilutcs/felix trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/felix/pull/116.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #116
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commit 27be0aa4a0c04e5028c2bc959d3576e928b123d5
Author: aattuluri <[email protected]>
Date: 2017-08-08T23:12:03Z
Add property based termination of class search for
sun.reflect.GeneratedMethodAccessor* classes.
commit daad505112c1cca0e6490c6a4c3462fe32a4ad3a
Author: aattuluri <[email protected]>
Date: 2017-08-09T03:49:06Z
Move termination to not incur the cost of boot delegation.
commit e06ff2a77aa395a0140512168a22cb6237638ed1
Author: aattuluri <[email protected]>
Date: 2017-08-09T03:56:06Z
Rename property.
----
> High CPU usage on sun.reflect.Generated* class loads by log4j
> --------------------------------------------------------------
>
> Key: FELIX-5665
> URL: https://issues.apache.org/jira/browse/FELIX-5665
> Project: Felix
> Issue Type: Improvement
> Components: Framework
> Affects Versions: framework-5.6.4
> Reporter: AnilKumar Attuluri
> Fix For: framework-5.6.8
>
> Attachments: IMG_1.jpg, IMG_2.jpg
>
>
> We have been running some performance tests to prepare our OSGi bundle
> (*running in Apache Karaf*) for production.
> Just to give some background about our OSGi bundle, we converted an existing
> Spring application into an OSGi bundle with all the current dependencies
> packaged into the bundle as an uber artifact.
> When we run >= 500 TPS (each of these calls results in a http call made via a
> library) we run into this high CPU usage spikes reaching up to 100% CPU.
> Please see the image attached, the spikes in the image are 100% CPU usage
> while the average is about 40%. Also see the CPU sampler image which points
> to
> *org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation*
> Is there an existing bug/documentation that already captures this?
> We don't see this behavior when we run the same app in standalone JVM.
>
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