On Mon, Jun 30, 2008 at 4:59 PM, allenb <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> I'm currently running a 4.0.1 server with 4.0.1 clients. I'd like to
> upgrade everything to 5.1.0, but not at the same time. Ideally, I'd do a 2
> stage upgrade where I first bump the server to 5.1.0 and then the clients.
>
> Are there any known compatibility issue between a 4.0.1 client and a 5.1.0
> server? I ask because in my testing there appears to be some problems. I'm
> running 4.0.1 clients against a 5.1.0 server and see errors similar to the
> following in the servers log over and over and eventually run out of heap.
>
> ERROR Service - Async error occurred:
> java.lang.NullPointerException
> java.lang.NullPointerException
> at org.apache.activemq.command.SessionId.<init>(SessionId.java:39)
> at
> org.apache.activemq.command.SessionInfo.<init>(SessionInfo.java:37)
> at
> org.apache.activemq.state.ConnectionState.<init>(ConnectionState.java:47)
> at
> org.apache.activemq.broker.TransportConnectionState.<init>(TransportConnectionState.java:35)
> at
> org.apache.activemq.broker.TransportConnection.processAddConnection(TransportConnection.java:619)
> at
> org.apache.activemq.command.ConnectionInfo.visit(ConnectionInfo.java:125)
> at
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:292)
> at
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:180)
> at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68)
> at
> org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:143)
> at
> org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:206)
> at
> org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84)
> at
> org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:196)
> at
> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:183)
> at java.lang.Thread.run(Unknown Source)
>
>
> Does anyone have any input on this? Is there a recommended upgrade path or
> a client/server compatibility matrix floating around?
Chances are there are some sizable incompatibilities between ActiveMQ
4.0.1 and 5.1 simply because the time between those releases is about
18 months. If you're going to upgrade the broker to 5.1 then I'd
recommend upgrading the clients at the same time.
Bruce
--
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Apache ActiveMQ - http://activemq.org/
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Blog: http://bruceblog.org/
