IBM iSeries throws unexpected SocketException
---------------------------------------------
Key: DIRMINA-200
URL: http://issues.apache.org/jira/browse/DIRMINA-200
Project: Directory MINA
Type: Bug
Versions: 0.9.3
Environment: mina-0.9.3 JDK 1.4.2 IBM iSeries OS/400 V5R2
Reporter: Simon Temple
Priority: Blocker
Attachments: mina-ex.patch
Proposal of a change to nio SocketSessionImpl.
I'd like the calls to:
getTrafficClass
setTrafficClass
setSendBufferSize
setReceiveBufferSize
to not throw RuntimeIOException when a SocketException is caught.
My reasoning is based on the Socket class javadoc:
E.g. setTrafficClass
"As the underlying network implementation may ignore this value applications
should consider it a hint."
and
"Setting bits in the precedence field may result in a SocketException
indicating that the operation is not permitted."
The other getter/setter method javadoc also refer to 'hints' and a 'if there is
an error obtaining' condition.
Some operating systems (OS/400 in my case ;-) ), do not allow the trafficClass
value to be read or written. I think this may also be the case as reported
here on Linux:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4709474
By ignoring the SocketException thrown by these methods (perhaps issuing a
log4j WARN instead? Or hooking up with an appropriate monitor?), socket
sessions can be established without error on an IBM iSeries.
Example stack trace:
2006-04-03 17:26:26,343 WARN
[org.apache.mina.common.support.DefaultExceptionMonitor](SocketAcceptor-0)
Unexpected exception.
org.apache.mina.common.RuntimeIOException: java.net.SocketException
at java.lang.Throwable.<init>(Throwable.java:240)
at java.lang.Exception.<init>(Exception.java:77)
at java.lang.RuntimeException.<init>(RuntimeException.java:77)
at
org.apache.mina.common.RuntimeIOException.<init>(RuntimeIOException.java:48)
at
org.apache.mina.transport.socket.nio.support.SocketSessionImpl$SocketSessionConfigImpl.setTrafficClass(SocketSessionImpl.java:342)
at
org.apache.mina.transport.socket.nio.support.SocketSessionImpl.<init>(SocketSessionImpl.java:71)
at
org.apache.mina.transport.socket.nio.support.SocketAcceptorDelegate$Worker.processSessions(SocketAcceptorDelegate.java:379)
at
org.apache.mina.transport.socket.nio.support.SocketAcceptorDelegate$Worker.run(SocketAcceptorDelegate.java:326)
Caused by: java.net.SocketException
at java.lang.Throwable.<init>(Throwable.java:180)
at java.lang.Exception.<init>(Exception.java:29)
at java.io.IOException.<init>(IOException.java:28)
at java.net.SocketException.<init>(SocketException.java:35)
at sun.nio.ch.Net.setIntOption(Net.java:156)
at sun.nio.ch.SocketChannelImpl$1.setInt(SocketChannelImpl.java:398)
at sun.nio.ch.SocketOptsImpl.setInt(SocketOptsImpl.java:46)
at sun.nio.ch.SocketOptsImpl$IP.typeOfService(SocketOptsImpl.java:249)
at sun.nio.ch.OptionAdaptor.setTrafficClass(OptionAdaptor.java:158)
at sun.nio.ch.SocketAdaptor.setTrafficClass(SocketAdaptor.java:320)
... 4 more
I have attached a proposed patch and welcome any comments.
SimonT
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