Closing SSLIOSession for hung SSL session can hang app
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Key: HTTPCORE-76
URL: https://issues.apache.org/jira/browse/HTTPCORE-76
Project: HttpComponents Core
Issue Type: Bug
Affects Versions: 4.0-alpha5
Reporter: Sandeep Tamhankar
Scenario:
* You use an SSLClientIOEventDispatch in a DefaultConnectingIOReactor so that
SSL connections will be opened.
* Use the reactor to send an https request to an SSL server. Have the SSL
server not respond (block forever).
* Have the app get its hands on NHttpClientConnection and try to shut down the
connection.
Expected Result:
The selector waiting on the response from the hung server should wake up.
Actual Result:
The selector is never told to wake up.
I believe the issue is that NHttpConnectionBase.shutdown calls close on the
underlying IOSession. For plain http, the IOSession is an IOSessionImpl, and
close does the right thing. For an SSLIOSession, close just shuts down the
outbound connection (I guess preparing for an orderly SSL shutdown). For a
hung server, you'll never wake up. If you know the server is hung apriori (as
I do in my use case), I'd like a way to force shutdown the connection.
In my source, I added a shutdown method to IOSession and IOSessionImpl
(SSLIOSession already has a shutdown method). From
NHttpConnectionBase.shutdown, I call IOSession.shutdown rather than
IOSession.close. I have IOSessionImpl.shutdown simply call close(), which does
the right thing. And SSLIOSession.shutdown already does what I want -- closes
the embedded IOSessionImpl, which wakes up the selector.
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