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Q
Qamar_khan
Level 3
January 2, 2019

How to resolve out of memory error Java heap space

  • January 2, 2019
  • 2 replies
  • 38253 views

Hello All,

             We have implemented java sling servlet rest API for AEM 6.4 version. We are facing  out of memory error at regular time interval and server hanging.

Can someone help how to resolve it ? or is it due java sling servlet implementation or due to some server configuration issue.

Thanks

Qamar

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    2 replies

    W
    Adobe Employee
    WasilZeeAdobe Employee
    Adobe Employee
    January 2, 2019

    Increase heap size first. Use correct memory parameters[1] either with jar or <crx-quickstart folder>/bin/start script when starting AEM instance.

    Check your servlet/custom code for any possible memory leaks.

    Thanks,

    Wasil

    [1] Increase java heap size – /home/edivad

      Q
      Qamar_khanAuthor
      Level 3
      January 2, 2019

      Thanks Wasil for  quick reply,

      1.Increase heap size first [I have done this]

      After posting this I have found below solution and I have done this also just one question,Is warnings also reason of it?

      2. Check your servlet/custom code for any possible memory leaks [I have done this]

      I will try this and update you result

      3.Use correct memory parameters[1] either with jar or <crx-quickstart folder>/bin/start script

      Thanks

      Qamar

        O
        Adobe Employee
        ogillAdobe Employee
        Adobe Employee
        January 3, 2019

        Thanks Opkar for reply,

                    Earlier this post in our AEM6.4 we had increased the heap size in parameter of stat.bat file and quickstart.bat file as

        if not defined CQ_JVM_OPTS set CQ_JVM_OPTS=-Xmx1024m -XX:MaxPermSize=1024M -Djava.awt.headless=true

        which suggested in Analyze Memory Problems. ​.  But still we were facing the server hanging issue.

        1.Secondly  we have tried this CQ_JVM_OPTS='-XX:+HeapDumpOnOutOfMemoryError' change which suggested in Analyze Memory Problems Page but in this case AEM were not stating.

        2.For agent and test the connection from (/etc/replication/agents.author/publish.html)

        we have tried but getting below attached error.

        Can you please tell me what is going wrong in AEM6.4 server setting or java bundle.

        Thanks

        Qamar


        Hi Qamar,

        the replication agent appears to be configured to point to localhost:4503, the default setting, which is used when running author and publish on the same local instance. If you are not running both on the same instance, add the correct url, also have you set the correct username and password for the publish instance? Follow this page to configure your Replication agent.

        Regards,

        Opkar

          raj_mandalapu
          raj_mandalapu
          Level 7
          January 8, 2019

          Hi Qamar, Performance issue is not a simple thing and it depends on multiple factors.

          1. What could be ideal size heap memory for AEM6.4

             It depends on mulitple factors.

          1.      Total how many users are going to hit your server?
          2.      How frequently you are updating content?
          3. What is the DAM content size?
          • etc.

          2.Second what can causing this server slow running behavior in our case

          When you upload Assets, internally the workflows will trigger, request you disable and try once. What is the size of Assets you are uploading? Please double check your code on closing resourceResolvers properly? is it happening on bulk upload or only for a single asset? How many users are parallelly accessing your server at a time?

          You can download thread dumps and check where the problem is?

            R
            RahulVa4
            Level 2
            September 14, 2023

            Hey you can increase your java heap size using this command just update your jar name.

            java -Xmx1024m -jar aem-jar-name.jar

             

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