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From "Julien Vermillard (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DIRMINA-832) NullPointerException logged by ExceptionMonitor while invoking a NioSocketConnector.connect() that fails
Date Wed, 27 Apr 2011 12:17:03 GMT

    [ https://issues.apache.org/jira/browse/DIRMINA-832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025760#comment-13025760
] 

Julien Vermillard commented on DIRMINA-832:
-------------------------------------------

Apparently it was debug code introduced in 2.0.3 and removed just after (hick-hup during the
last release process)
Should be fixed with current 2.0.4-SNAPSHOT : http://svn.apache.org/repos/asf/mina/branches/2.0.4/

> NullPointerException logged by ExceptionMonitor while invoking a NioSocketConnector.connect()
that fails
> --------------------------------------------------------------------------------------------------------
>
>                 Key: DIRMINA-832
>                 URL: https://issues.apache.org/jira/browse/DIRMINA-832
>             Project: MINA
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.0.3
>            Reporter: Matteo Candaten
>             Fix For: 2.0.4
>
>
> A NullPointerException is logged by the ExceptionMonitor while invoking NioSocketConnector.connect(SocketAddress
remoteAddress). 
> This occurs in a failure scenario where the connect fails (the connectFuture eventually
returns a "java.net.ConnectException: Connection refused" exception). 
> This is the stack trace:
> WARN  27Apr 19:01:33.761 [thread-0] DefaultExceptionMonitor Unexpected exception.
> java.lang.NullPointerException
> 	at org.apache.mina.transport.socket.nio.NioSocketConnector.close(NioSocketConnector.java:218)
> 	at org.apache.mina.transport.socket.nio.NioSocketConnector.close(NioSocketConnector.java:48)
> 	at org.apache.mina.core.polling.AbstractPollingIoConnector.connect0(AbstractPollingIoConnector.java:335)
> 	at org.apache.mina.core.service.AbstractIoConnector.connect(AbstractIoConnector.java:262)
> 	at org.apache.mina.core.service.AbstractIoConnector.connect(AbstractIoConnector.java:172)
> the AbstractPollingIoConnector invokes the close(handle) method following the connection
failure, and the implementation of that method in NioSocketConnector throws a NullPointerException
on line 218:
> 210    @Override
> 211    protected void close(SocketChannel handle) throws Exception {
> 212        SelectionKey key = handle.keyFor(selector);
> 213        
> 214        if (key != null) {
> 215            key.cancel();
> 216        }
> 217        
> 218        IoSession session = (IoSession)key.attach(null);
> 219        IoFilterChain filterChain = session.getFilterChain(); 
> 220        filterChain.fireSessionClosed();
> 221        
> 222        handle.close();
> 223    }
> I think lines 218-220 were added in version 2.0.3. I suspect the fix is to move them
inside the if (key != null) { } block above. 

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