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https://issues.apache.org/jira/browse/SYNAPSE-344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602329#action_12602329
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Jake Lambert commented on SYNAPSE-344:
--------------------------------------
I'm able to reproduce the problem with the head of the Synapse 1.2 trunk (beta
1, svn rev 663252). Both this bug and related SYNAPSE-341 use the same test
case as the fixed SYNAPSE-321bug (proxy service, concurrency, larger messages
with attachments, targetting Axis2 service) - these are just further problems
I'm finding.
> Race condition on connection reuse causes 'Request already submitted'
> exception
> -------------------------------------------------------------------------------
>
> Key: SYNAPSE-344
> URL: https://issues.apache.org/jira/browse/SYNAPSE-344
> Project: Synapse
> Issue Type: Bug
> Components: Transports
> Affects Versions: 1.1.1
> Environment: All environments
> Reporter: Jake Lambert
> Priority: Critical
>
> When using a proxy service and HTTP-NIO with a moderate number of concurrent
> requests some requests fail with the following error:
> HttpServerWorker-25: 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)
> at
> org.apache.synapse.transport.nhttp.ClientHandler.submitRequest(ClientHandler.java:142)
> at
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:340)
> at
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:256)
> ...
> This can occur in a situation similar to that in SYNAPSE-341 (remote WS
> returns its response before the request is fully written). It's due to a
> race condition when reusing a connection between a client I/O dispatcher
> thread calling NHttpClientConnection.resetOutput() when the request writing
> is complete and an HttpServerWorker thread calling
> NHttpClientConnection.submitRequest() on the same pooled connection after it
> has been released when the response reading is complete.
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