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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ODE-943) NoClassDefFoundError for org.apache.log4j.helpers.AbsoluteTimeDateFormat in SimpleScheduler.doLoadImmediate() leads memory leak
Date Wed, 18 Sep 2013 20:55:52 GMT

    [ https://issues.apache.org/jira/browse/ODE-943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13771228#comment-13771228
] 

Hudson commented on ODE-943:
----------------------------

SUCCESS: Integrated in ODE-1.x #429 (See [https://builds.apache.org/job/ODE-1.x/429/])
Revert "ODE-943: fixing a scheduler bug. Thanks Waruna for the patch." (vanto: rev ffccd41af8fce424e4e914536a86ebcaeb4a2836)
* scheduler-simple/src/main/java/org/apache/ode/scheduler/simple/SimpleScheduler.java

                
> NoClassDefFoundError for org.apache.log4j.helpers.AbsoluteTimeDateFormat in SimpleScheduler.doLoadImmediate()
leads memory leak
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ODE-943
>                 URL: https://issues.apache.org/jira/browse/ODE-943
>             Project: ODE
>          Issue Type: Bug
>          Components: BPEL Runtime, JBI Integration
>    Affects Versions: 1.3.5, 1.4
>         Environment: Ubuntu 11.04 64bit, Oracle JDK 1.6, Servicemix 4.3.0
>            Reporter: Abdulkadir Yaman
>            Assignee: Tammo van Lessen
>             Fix For: 1.3.6, 1.4
>
>
> On a fresh installation of Servicemix 4.3.0 does not expose org.apache.log4j.helpers
by default although Pax logging bundle contains this package. At line:707 of Ode_1.3.5 version
and line:732 of trunk,  AbsoluteTimeDateFormat f = new AbsoluteTimeDateFormat(); line leads
to NoClassDefFoundError for org.apache.log4j.helpers.AbsoluteTimeDateFormat. As this error
is a subclass of throwable, it is not caught in catch() block.
> This issue leads to huge memory leak under load as _processedSinceLastLoadTask.clear();
line can not be reached ever, 1 million requests will make your 1gb heap size drained and
get your servicemix in a fullgc cycles.
> I worked around this issue by wrapping log4j jar into servicemix by karaf@ osgi:install
-s wrap:mvn:log4j/log4j/1.2.13 , and restarting whole system. 
> Also log4j dependencies are imported as resolution:optional in MANIFEST-MF in ode-jbi
bundle. 
> To reproduce;
> 1 - reduce heap size in servicemix executable
> 2 - add jvm option : -verbosegc to watch gc and fullgc cycles on karaf console or -Xloggc:somefile.out
for tailing a file for output
> 3 - set KARAF_DEBUG=true in case you want to debug and see _processedSinceLastLoadTask.size()
shows increasing number of entries
> 3 - download servicemix 4.3.0 from apache
> 4 - in karaf console, features:install ode
> 5 - deploy a simple bpel flow,   features:install examples-ode-ping-pong
> 6 - generate load either via JMeter or Soapui
> 7 - take a heap dump either via jmap or via JConsole finding mbean  com.sun.management-->HotSpotDiagnostic-->
operations --> dumpHeap(heapdump.snapshot) , you can find dump file under $SMX_HOME
> 8 - analyse it via yourkit profiler or jprofiler, whatever suits you, you will see one
object retain most of the memory, which is  org/apache/ode/scheduler/simple/SimpleScheduler
on object explorer window.

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