badmagicexception possible causes ?

[martin.virile]

Hi All

I got the following exception while starting fuse amq

ERROR: java.lang.RuntimeException: Failed to execute start task. Reason: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.apache.activemq.xbean.XBeanBrokerService#0' defined in class path resource : Invocation of init method failed; nested exception is org.apache.activemq.kaha.impl.index.BadMagicException

java.lang.RuntimeException: Failed to execute start task. Reason: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.apache.activemq.xbean.XBeanBrokerService#0' defined in class path resource : Invocation of init method failed; nested exception is org.apache.activemq.kaha.impl.index.BadMagicException

        at org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:99)

        at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)

        at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:106)

        at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:51)

        at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:78)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

        at org.apache.activemq.console.Main.runTaskClass(Main.java:225)

        at org.apache.activemq.console.Main.main(Main.java:106)

This exception talks abt some badmagicexception for which the javadoc doesnt give a convincing explanation. I ran it on Linux box

wat could be the possible causes of fuse amq not being able to read the files

This issue got resolved after i deleted the contents of the data folder and restarted the amq.

[davestanley]

Hi

It sounds like your message store index was corrupt. By deleting the data directory, you effectively wiped your message store, so this explains why the broker started correctly after that. A possible downside to this approach is that you would lose any persistent messages awaiting consumption.

It is possbile to force automatic recovery if using the Kaha reference store (the default) by deleting the kr-store/state/index-store-state file. This would just rebuild the indexes based on the existing message store without loosing persisted messages.

Regards

/Dave

[davestanley]

Martin

I also meant to ask you to post the version of the broker you were using. I have not seen this error before so it would be good to note the version that you saw the problem on.

Thanks

/Dave

[martin.virile]

Hi Dave

its Fuse 5.0.0.29

[davestanley]

Great, thanks for the update.