MQSeries.net :: View topic - MQJE001 / 2009 error Java 1.5 + WS2003 + TCP Offload/Chimney

lhotari

We had communication problems in Windows 2003 which has SNP (Scalable Networking Pack) installed. SNP enables TCP Offload Engine (http://en.wikipedia.org/wiki/TCP_Offload_Engine) by default if the NIC supports it. The NIC was Broadcom NetXtreme II BCM 5708 C with a driver version 3.0.5.0 .

The problem occurs only with Java 1.5.x, not in Java 1.4.x . (this might be because of the different way Java uses the underlying OS socket library)

The TOE support is buggy with this NIC driver version. It causes this kind of error in the tracing log:
WrapperSimpleAppMain, Object: com.ibm.mq.MQv6InternalCommunications@12366215 Exception:
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:197)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:229)

This turns in to this error in client code:
com.ibm.mq.MQException: MQJE001: Completion Code 2, Reason 2009
at com.ibm.mq.MQQueue.get(MQQueue.java:1033)

All java sockets have this problem which have TCP SO_TIMEOUT (socket timeout) enabled.

The workaround is to disable TCP Chimney / TOE in Windows 2003 server.
This can be done from command line:
netsh int ip set chimney DISABLED

More information about TCP Chimney settings (registry keys): http://support.microsoft.com/kb/912222

Upgrading the NIC's driver might also help.
(Broadcom driver upgrade: http://www.broadcom.com/support/ethernet_nic/netxtremeii.php)