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From "Michael Sebastian (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (WW-3971) Struts 2.3.8 threads BLOCKED in com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration
Date Tue, 22 Jan 2013 03:24:13 GMT

     [ https://issues.apache.org/jira/browse/WW-3971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Sebastian updated WW-3971:
----------------------------------

    Attachment: Thread_Dump_During_BLOCKED_Threads.tdump

Thread dump taken using VisualVM during blocked threads.
                
> Struts 2.3.8 threads BLOCKED in com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration
> ----------------------------------------------------------------------------------------------------
>
>                 Key: WW-3971
>                 URL: https://issues.apache.org/jira/browse/WW-3971
>             Project: Struts 2
>          Issue Type: Bug
>          Components: XML Configuration
>    Affects Versions: 2.3.8
>         Environment: apache-tomcat-6.0.32, jdk1.6.0_27, devMode set to false.
>            Reporter: Michael Sebastian
>         Attachments: Thread_Dump_During_BLOCKED_Threads.tdump
>
>
> While load testing a web application on Tomcat 6 using Struts 2.3.8 version. devMode
is set to false. 
> Found lot of BLOCKED threads in this method: 
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration() 
> This is causing high CPU usage for the application. also found that com.opensymphony.xwork2.config.ConfigurationManager.conditionalRelad
is taking time which causes getconfiguration (synchronized) to queue up for processing. 
> This happens when concurrent users are above 100. 

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