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

[Srivathsan Agaram Venkatavaradhan (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-4617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Srivathsan Agaram Venkatavaradhan updated WFLY-4617:
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    Attachment: newheap1_Leak_Suspects.zip


Leak suspect report in MAT

> 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: Jason Greene
>              Labels: 8.2.0.Final, gc, undertow, wildfly
>         Attachments: newheap1_Leak_Suspects.zip
>
>
> 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 . I can reproduce this issue in 60 users Jmeter loadtest. This was not the case in Jaboss 7.1.1Final. 
> After analyzing heapdumps, I can see 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.
> "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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