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Posted to dev@synapse.apache.org by "Asankha C. Perera (JIRA)" <ji...@apache.org> on 2008/10/29 07:10:44 UTC
[jira] Resolved: (SYNAPSE-344) Race condition on connection reuse
causes 'Request already submitted' exception
[ https://issues.apache.org/jira/browse/SYNAPSE-344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Asankha C. Perera resolved SYNAPSE-344.
---------------------------------------
Resolution: Fixed
Fix Version/s: 1.3
Assignee: Asankha C. Perera
Fixed with send abort detection and SYNAPSE-341
> 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
> Assignee: Asankha C. Perera
> Priority: Critical
> Fix For: 1.3
>
>
> 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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