[jboss-jira] [JBoss JIRA] Created: (JBREM-552) cannot init cause of ClassCastException
cannot init cause of ClassCastException
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Key: JBREM-552
URL: http://jira.jboss.com/jira/browse/JBREM-552
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 2.0.0.Beta2 (Boon)
Reporter: John Mazzitelli
Assigned To: Tom Elrod
Priority: Minor
Fix For: 2.0.0.CR1 (Boon)
I'm in a catch clause within InvokerRegistry and I'm getting a weird exception
thrown:
java.lang.IllegalStateException: Can't overwrite cause
at java.lang.Throwable.initCause(Throwable.java:320)
at org.jboss.remoting.InvokerRegistry.loadClientInvoker(InvokerRegistry.java:447)
at org.jboss.remoting.InvokerRegistry.createClientInvoker(InvokerRegistry.java:324)
at org.jboss.remoting.Client.connect(Client.java:385)
at
org.jboss.on.communications.command.client.JBossRemotingRemoteCommunicator.getRemotingClient(JBossRemotingRemoteCommunicator.java:470)
at
org.jboss.on.communications.command.client.JBossRemotingRemoteCommunicator.send(JBossRemotingRemoteCommunicator.java:430)
at
org.jboss.on.communications.command.client.AbstractCommandClient.invoke(AbstractCommandClient.java:167)
at
org.jboss.on.communications.command.client.ClientCommandSender.send(ClientCommandSender.java:820)
at
org.jboss.on.communications.command.client.ServerPollingThread.run(ServerPollingThread.java:102)
Look at line 447 and you'll see it is trying to init the cause of a
ClassNotFoundException. Running in a debugger, the newly constructed exception created on
446 has a null cause. Looking then at Throwable.initCause and you'll see a null cause
causes this IllegalStateException to be thrown. The cause needs to be "this",
not null (I don't know why, seems like it should also look for null, but whatever -
that's the way the JDK is written).
The fix is simple - use the constructor that takes a throwable as its second parameter.
Not sure why initCause it being used, as opposed to this constructor.
e.g.:
new ClassNotFoundException("Can not invoke loadClientInvokerClass method on " +
transportFactoryClass, e);
(notice the ", e" parameter).
There are three other instances where initCause is called on ClassNotFoundException that
also need to be fixed. See the other catch clauses in here.
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