[xmlblaster] NullPointer exception

[David Kerry <xml at navahonetworks.com>]

Hello all,

We just ran into another exception in the server that seems to have totally confused
our clients:

Jun 28, 2006 8:41:17 AM org.xmlBlaster.engine.AvailabilityChecker checkException
SEVERE: publishArr() failed: XmlBlasterException serverSideException=true node=[xmlBlaster_172_23_254_15_10412] location=[TopicHandler] java.lang.NullPointerException
stackTrace=java.lang.NullPointerException
        at org.xmlBlaster.authentication.SessionInfo.toXml(SessionInfo.java:594)
        at org.xmlBlaster.engine.TopicHandler.checkIfAllowedToSend(TopicHandler.java:1219)
        at org.xmlBlaster.engine.TopicHandler.invokeCallback(TopicHandler.java:1342)
        at org.xmlBlaster.engine.TopicHandler.invokeCallbackAndHandleFailure(TopicHandler.java:1202)
        at org.xmlBlaster.engine.TopicHandler.publish(TopicHandler.java:660)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1704)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1495)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1489)
        at org.xmlBlaster.engine.XmlBlasterImpl.publishArr(XmlBlasterImpl.java:198)
        at org.xmlBlaster.util.protocol.RequestReplyExecutor.receiveReply(RequestReplyExecutor.java:405)
        at org.xmlBlaster.protocol.socket.HandleClient.handleMessage(HandleClient.java:232)
        at org.xmlBlaster.protocol.socket.HandleClient.run(HandleClient.java:354)
        at java.lang.Thread.run(Thread.java:595)
errorCode=internal.unknown message=#15171M This is an unknown and unexpected error, usually a Java runtime exception, please post it to the mailing list. -> http://www.xmlblaster.org/xmlBlaster/doc/requirements/admin.errorcodes.listing.html#internal.unknown
        at org.xmlBlaster.engine.TopicHandler.publish(TopicHandler.java:669)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1704)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1495)
        at org.xmlBlaster.engine.RequestBroker.publish(RequestBroker.java:1489)
        at org.xmlBlaster.engine.XmlBlasterImpl.publishArr(XmlBlasterImpl.java:198)
        at org.xmlBlaster.util.protocol.RequestReplyExecutor.receiveReply(RequestReplyExecutor.java:405)
        at org.xmlBlaster.protocol.socket.HandleClient.handleMessage(HandleClient.java:232)
        at org.xmlBlaster.protocol.socket.HandleClient.run(HandleClient.java:354)
        at java.lang.Thread.run(Thread.java:595)
versionInfo=version=1.2,revision=15171M,os.name=Linux,os.version=2.6.15.6,java.vm.vendor=Sun Microsystems Inc.,java.vm.version=1.5.0_06-b05,os.arch=i386,build.timestamp=05/24/2006 09:56 AM,build.java.vendor=Sun Microsystems Inc.,build.java.version=1.5.0_04 errorCode description=http://www.xmlblaster.org/xmlBlaster/doc/requirements/admin.errorcodes.listing.html#internal.unknown

Jun 28, 2006 8:41:17 AM org.xmlBlaster.protocol.socket.HandleClient handleMessage
FINE: Can't handle message, throwing exception back to client: errorCode=internal.unknown message=#15171M This is an unknown and unexpected error, usually a Java runtime exception, please post it to the mailing list. -> http://www.xmlblaster.org/xmlBlaster/doc/requirements/admin.errorcodes.listing.html#internal.unknown :
 java.lang.NullPointerException


Also, since I'm here - any word on resolving some of the other
multi-thread race issues we keep banging into?  For some reason,
our access patterns seem to expose them more than anyone else it seems.

-- 
David Kerry