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
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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