Network exception caused Synapse-Http-Transport Stop working
------------------------------------------------------------
Key: SYNAPSE-247
URL: https://issues.apache.org/jira/browse/SYNAPSE-247
Project: Synapse
Issue Type: Bug
Components: Transports
Affects Versions: 1.1.1
Reporter: HongBo Xu
Priority: Critical
Test:
axisClient-->Synapse--->axisServer(not started)
Appearance:
If running synapse in debugging mode, we will see once a axisClient
connect to synapse,
a new HttpServerWorker-Thread will be created, but never stop, and soon
the thread-pool will be exhaused;
Step:
1) axisClient send a request to synapse (the request's content must be
large enough( etc exceed 1024 character))
2) synapse relay the request from axisClient to a not started axisServer
3) then synapse will blocked while axis2Req.streamContents(), and the
thread will be blocked
Description:
/*
axisReq using a internal Channel to transfer streamed data of axis request
to Http underlying encoder for transport
so if the request content is larger than channel's internal buffer,
streamMessageContents() will blocked and
waiting the successfully http-connection to read the data from channel.
*/
Axis2HttpRequest.streamMessageContents(){
OutputStream out = Channels.newOutputStream(pipe.sink()); //pipe is
...
}
ClientHandler.outputReady(...){
//read data from channel
//write readed data to http-core-nio's underlying encoder
}
/*
But if http-connection failed, ClientHandler's callback cactch it and just
shutdown httpConnection only.
the streamMessageContents() will blocked for ever
*/
ClientHandler:
public void exception(final NHttpClientConnection conn, final IOException
e) {
shutdownConnection(conn);
}
HttpCoreNIOSender:
private void sendAsyncRequest(EndpointReference epr, MessageContext
msgContext) throws AxisFault {
...............
axis2Req.streamMessageContents();
....
}
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