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https://issues.apache.org/jira/browse/SYNAPSE-452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12676628#action_12676628
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Asankha C. Perera commented on SYNAPSE-452:
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I have fixed this already.. and will checkin the code shortly after a bit of
more testing
> low load: ERROR ClientHandler Unexpected HTTP protocol error: Request already
> submitted
> ---------------------------------------------------------------------------------------
>
> Key: SYNAPSE-452
> URL: https://issues.apache.org/jira/browse/SYNAPSE-452
> Project: Synapse
> Issue Type: Bug
> Components: Transports
> Affects Versions: 1.2
> Environment: found on wso2-esb 1.7.1 (having synapse 1.2) running on
> debian. XEN vm's running on Intel HW.
> The back-end is a spring webapp (using cxf, using commons-httpclient)
> We run the backend on the same VM as the ESB.
> Reporter: harm verhagen
> Assignee: Asankha C. Perera
>
> I'm seen http connection related exceptions when under _very_ low load.
> what do I do:
> I proxy a soap interface of a backend, using wso2.
> I issue a soap command using www.soapui.org.
> After 1,2,3 commands (issue manually) the bus gives internal excpetions.
> what do I get:
> from ESB logging.
> 2008-09-16 15:33:29,157 [127.0.0.1-vloeki_v01] [HttpServerWorker-9] ERROR
> ClientHandler Unexpected HTTP protocol error: Request already submitted
> org.apache.http.HttpException: Request already submitted
> at
> org.apache.http.impl.nio.DefaultNHttpClientConnection.submitRequest(DefaultNHttpClientConnection.java:203)
> reference:
> more details & logs at:
> http://wso2.org/mailarchive/esb-java-user/2008-September/000812.html
> workaround:
> When not running the ESB and the backend on the same machine, (or better
> said, when routing the traffic between ESB and backend trough an other
> machine). The problem went away..
> see http://wso2.org/mailarchive/esb-java-user/2008-September/000840.html.
> This obviously isn't a real fix.
> This issue might be related to:
> https://issues.apache.org/jira/browse/SYNAPSE-344
> https://issues.apache.org/jira/browse/SYNAPSE-341
> https://issues.apache.org/jira/browse/HTTPCORE-170
> however, I'm seeing this under very low loads, very reproducable. (I _never_
> can more that 3 commands in 4 seconds without getting this error)
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