[jboss-jira] [JBoss JIRA] (WFLY-4591) Memory leak inPerThreadTagHandlerPool | Wildfly 8.2.0.Final (Undertow)

[Srivathsan Agaram Venkatavaradhan (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-4591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071446#comment-13071446 ] 

Srivathsan Agaram Venkatavaradhan commented on WFLY-4591:
---------------------------------------------------------

Thanks. We will try this. 
1. Is there a way to precompile jsps using jastow ?
2. If not we are actually compiling against latest tomcat version(tomcat 8) and running with wildlfy 8.2.0.final . Since jastow provides is not rebased with latest tomcat, we are seeing issues with classes not found, so this jar will help us . Any idea when this jar would be fully tested and available for use.

> Memory leak inPerThreadTagHandlerPool | Wildfly 8.2.0.Final (Undertow)
> ----------------------------------------------------------------------
>
>                 Key: WFLY-4591
>                 URL: https://issues.jboss.org/browse/WFLY-4591
>             Project: WildFly
>          Issue Type: Bug
>          Components: Web (Undertow)
>    Affects Versions: 8.2.0.Final
>         Environment: CentOS release 6.5 (Final), java version "1.7.0_71" 64 bit VM, Wildfly 8.2.0.Final,  Min heap and Max heap 1536m
>  
>            Reporter: Srivathsan Agaram Venkatavaradhan
>            Assignee: Tomaz Cerar
>              Labels: garbage, jastow, undertow, wildfly
>         Attachments: jastow-2.0.0-SNAPSHOT.jar
>
>
> We upgraded from Jboss 7.1.1.Final to Wildfly 8.2.0.Final. After the upgrade we are seeing full frequent garbage collection (happening every 2 mins)  during load test.  This was not the case in Jboss 7.1.1.Final.  Our heap dumps suggested that there is huge memory leak with 
> org.apache.jasper.runtime.BodyContentImpl.  This is part of JSP runtime (jastow). On analysis we found that undertow uses default as PerThreadTagHanlderPool. By changing this to TagHanlderPool, this issue seems to vanish. 
> diff --git a/src/main/java/org/apache/jasper/runtime/TagHandlerPool.java b/src/main/java/org/apache/jasper/runtime/TagHandlerPool.java
> index eaa8560..c6c785f 100644
> --- a/src/main/java/org/apache/jasper/runtime/TagHandlerPool.java
> +++ b/src/main/java/org/apache/jasper/runtime/TagHandlerPool.java
> @@ -53,7 +53,7 @@ public class TagHandlerPool {
>                  result = null;
>              }
>          }
> -        if( result==null ) result=new PerThreadTagHandlerPool();
> +        if( result==null ) result=new TagHandlerPool();
>          result.init(config);
>  
>          return result;
> - See more at: https://developer.jboss.org/message/927538#927538
> I think this issue may be related to https://issues.jboss.org/browse/WFLY-4617  as there were huge garbage created and most of the contents were char array (rendered html). May be TagHanlderPool is creating more char instead of reusing from pool. Please provide thoughts. I can share, heapdump or MAT screenshots if needed.



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