Hey Rob, Thanks for the reply. BTW, when do you expect to roll out 5.1? We really need it due to this bug & NFS based master/slave which is broken in 5.0.
Thanks, Ramit rajdavies wrote: > > Hi Ramit, > > only just saw you stack trace - this is a known problem - caused by a > bug in the InactivityMonitor - its fixed in the upcoming 5.1 release > (you could test the release candidate - here: > http://people.apache.org/~chirino/staging-repos/activemq-5.1.0-RC3/org/apache/activemq/apache-activemq/5.1.0/) > > cheers, > > Rob > > > On 16 Apr 2008, at 07:03, Ramit Arora wrote: >> >> Hey Fred, >> The problem seems to be a bit strange. It occurs only if I use >> Solaris to >> host my broker. The problem is much more frequent if the server >> machine is >> Solaris/x86 rather than Solaris/Sparc. Windows machines are not >> suffering >> from this problem. And the problem disappears if i use JNDI to set my >> connection factories & destinations. Pretty weird! >> >> Thanks, >> Ramit >> >> Fred D wrote: >>> >>> Maybe try to see where the thresold is ... increase 1 or 2 subsribers >>> until it happens. >>> >>> A workaround might be to try a network of 2 brokers perhaps to see >>> if its >>> a scaling issue. >>> >>> Fred >>> >>> >>> Ramit Arora wrote: >>>> >>>> Hi, >>>> I am testing ActiveMQ 5.0 using a Perl Publisher (using >>>> Net::Stomp) & >>>> Java Subscribers (Openwire). It works well when the number of >>>> subscribers >>>> is low (1 or 2) but when I increase the number of subscribers to >>>> around >>>> 10, I face the following problem: >>>> >>>> A subscriber shows the following stack trace >>>> Exception in thread "ActiveMQ Transport: >>>> tcp://xx.yy.zz.com/nnn.nn.nnn.nn:61616" >>>> java.lang.ClassCastException: >>>> org.apache.activemq.command.BrokerId can not be cast to >>>> org.apache.activemq.command.ConsumerId >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3.MessageMarshaller.tightUnmarshal(MessageMarshaller.java:71) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .ActiveMQMessageMarshaller >>>> .tightUnmarshal(ActiveMQMessageMarshaller.java:67) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .ActiveMQTextMessageMarshaller >>>> .tightUnmarshal(ActiveMQTextMessageMarshaller.java:67) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .OpenWireFormat.tightUnmarshalNestedObject(OpenWireFormat.java:452) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .BaseDataStreamMarshaller >>>> .tightUnmarsalNestedObject(BaseDataStreamMarshaller.java:127) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .MessageDispatchMarshaller >>>> .tightUnmarshal(MessageDispatchMarshaller.java:72) >>>> at >>>> org >>>> .apache >>>> .activemq.openwire.OpenWireFormat.doUnmarshal(OpenWireFormat.java: >>>> 361) >>>> at >>>> org >>>> .apache >>>> .activemq.openwire.OpenWireFormat.unmarshal(OpenWireFormat.java:275) >>>> at >>>> org >>>> .apache >>>> .activemq.transport.tcp.TcpTransport.readCommand(TcpTransport.java: >>>> 192) >>>> at >>>> org >>>> .apache >>>> .activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:184) >>>> at >>>> org >>>> .apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java: >>>> 172) >>>> at java.lang.Thread.run(Thread.java:619) >>>> >>>> The broker shows the following stack trace: >>>> Exception in thread "ActiveMQ Connection Dispatcher: /nnn.nn.nn.nn: >>>> 39997" >>>> java.lang.NullPointerException >>>> at java.lang.System.arraycopy(Native Method) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .transport >>>> .tcp.TcpBufferedOutputStream.write(TcpBufferedOutputStream.java:89) >>>> at java.io.DataOutputStream.write(DataOutputStream.java:90) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .BaseDataStreamMarshaller >>>> .tightMarshalByteSequence2(BaseDataStreamMarshaller.java:433) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3.MessageMarshaller.tightMarshal2(MessageMarshaller.java:173) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .ActiveMQMessageMarshaller >>>> .tightMarshal2(ActiveMQMessageMarshaller.java:90) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .ActiveMQTextMessageMarshaller >>>> .tightMarshal2(ActiveMQTextMessageMarshaller.java:90) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .OpenWireFormat.tightMarshalNestedObject2(OpenWireFormat.java:423) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .BaseDataStreamMarshaller >>>> .tightMarshalNestedObject2(BaseDataStreamMarshaller.java:137) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .openwire >>>> .v3 >>>> .MessageDispatchMarshaller >>>> .tightMarshal2(MessageDispatchMarshaller.java:106) >>>> at >>>> org >>>> .apache >>>> .activemq.openwire.OpenWireFormat.marshal(OpenWireFormat.java:238) >>>> at >>>> org >>>> .apache >>>> .activemq.transport.tcp.TcpTransport.oneway(TcpTransport.java:153) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .transport.InactivityMonitor.oneway(InactivityMonitor.java:157) >>>> at >>>> org >>>> .apache >>>> .activemq.transport.TransportFilter.oneway(TransportFilter.java:82) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .transport.WireFormatNegotiator.oneway(WireFormatNegotiator.java:91) >>>> at >>>> org >>>> .apache >>>> .activemq.transport.MutexTransport.oneway(MutexTransport.java:40) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .broker.TransportConnection.dispatch(TransportConnection.java:1151) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .broker >>>> .TransportConnection.processDispatch(TransportConnection.java:766) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .broker.TransportConnection.iterate(TransportConnection.java:801) >>>> at >>>> org >>>> .apache >>>> .activemq >>>> .thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:98) >>>> at >>>> org.apache.activemq.thread.DedicatedTaskRunner >>>> $1.run(DedicatedTaskRunner.java:36) >>>> >>>> The broker & the subscriber keep running after this, but the >>>> broker does >>>> not deliver messages to that subscriber. Other subscribers work >>>> fine. >>>> This problem is repeatedly occuring. I am using SunOS 5.10 on a >>>> machine >>>> with 8 processors & 32 GB of RAM. >>>> Please help! >>>> >>>> TIA, >>>> Ramit >>>> >>>> >>>> >>> >>> >> >> -- >> View this message in context: >> http://www.nabble.com/Null-Pointer-Exception-on-broker-tp16048936s2354p16717003.html >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. >> > > > -- View this message in context: http://www.nabble.com/Null-Pointer-Exception-on-broker-tp16048936s2354p16717433.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
