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swapnilumalkar
New Participant
January 8, 2019

Memory leak:Getting heap dump at my AEM publisher

  • January 8, 2019
  • 8 replies
  • 10346 views

Hi Team,

I am getting heap dump and GC on my AEM server when doing soak test the following is the report.

Problem Suspect 1

One instance of "org.apache.sling.models.impl.ModelAdapterFactory" loaded by "org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c7e3e280" occupies 214,336,312 (29.68%) bytes. The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Node[]" loaded by "<system class loader>".

Keywords
java.util.concurrent.ConcurrentHashMap$Node[]
org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c7e3e280
org.apache.sling.models.impl.ModelAdapterFactory

Details »

Problem Suspect 2

10,992 instances of "org.apache.jackrabbit.oak.segment.Segment", loaded by "org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c1c84e10" occupy 79,999,744 (11.08%) bytes. These instances are referenced from one instance of "com.google.common.cache.LocalCache$Segment[]", loaded by "org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c1c77e70"

Keywords
org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c1c77e70
com.google.common.cache.LocalCache$Segment[]
org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ 0x5c1c84e10
org.apache.jackrabbit.oak.segment.Segment

Can someone tell me how to proceeds

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8 replies

W
wimsymonsvrt
New Participant
January 9, 2019

According to what I see, is that you only have 800mb of heap space. Seems to me you did not pass Xms and Xmx parameters to your publish instance. A production instance needs more than 1gb ram. Give it some more breathing room. For example 4gb.

    S
    swapnilumalkarAuthor
    New Participant
    January 9, 2019

    Hi Thanks for your response

    we have started JVM as per below

    java -server -Xms8192m -Xmx8192m -XX:MaxPermSize=256M -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -XX:+UnlockDiagnosticVMOptions -XX:+HeapDumpOnOutOfMemoryError -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -Xloggc:/mountpoint2/aem/crx-quickstart/logs/gc-2019_01_05-09_08.log -Dsling.run.modes=publish,uat,standalone,nosamplecontent,crx3,crx3tar -jar crx-quickstart/app/cq-quickstart-6.3.0-standalone-quickstart.jar start -c crx-quickstart -i launchpad -p 61003 -Dsling.properties=conf/sling.properties

      S
      swapnilumalkarAuthor
      New Participant
      January 9, 2019

      Kindly tell me if anything need to change in above start up script.

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