[jboss-jira] [JBoss JIRA] (WFLY-4617) Huge garbage created at regular intervals in Wildfly 8.2.0.Final

[Stuart Douglas (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-4617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067468#comment-13067468 ] 

Stuart Douglas commented on WFLY-4617:
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Are you using CDI in your application? CDI is enabled by default in EE7, if you are not using it can you try removing the subsystem and trying again?

I also notice that you are using infinispan? Are you using this for session replication?

The only thing I can think of is that something else is generating garbage, and forcing your data out of the new generation before the server is done with it. 

> Huge garbage created at regular intervals in Wildfly 8.2.0.Final
> ----------------------------------------------------------------
>
>                 Key: WFLY-4617
>                 URL: https://issues.jboss.org/browse/WFLY-4617
>             Project: WildFly
>          Issue Type: Bug
>    Affects Versions: 8.2.0.Final
>         Environment: Centos 7, JDK 7
>            Reporter: Srivathsan Agaram Venkatavaradhan
>            Assignee: Stuart Douglas
>              Labels: 8.2.0.Final, gc, undertow, wildfly
>         Attachments: Char Array Incoming reference, Char Array Retained Objects, Heap Histogram View, merge paths - ArtifactDetailList, newheap1_Leak_Suspects.zip, Overall Heap, Overall Memory Usages
>
>
> Huge garbage is created in wildfly every couple of minutes. Though Full GC is able to reclaim memory, this causes frequent full gcs, as heap is getting occupied due to the increase in number of objects created . We can reproduce this issue in 60 users Jmeter loadtest. This was not the case in Jboss 7.1.1Final. 
> After analyzing heapdumps,   Huge char arrays are created and they are not garbage collected by Minor GC.  Incoming reference for the char array suggest that they have valid reference to io.undertow.servlet.spec.HttpServletRequestImpl. However full gc is able to recover the memory. Not sure why attributes in  io.undertow.servlet.spec.HttpServletRequestImpl are not getting gced by minor gc's.
> "org.apache.struts.tiles.ComponentContext"  is kept in  attributes Map by io.undertow.servlet.spec.HttpServletRequestImpl.  org.apache.struts.tiles.ComponentContext contains a big char array.
> We suspect issue with undertow.



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