Re: [mod_cluster-dev] nullpointer exception while updating cluster status
This looks like the result of a partition merge. The merging of 2
partitions creates a situation where a former singleton master might be
in the middle of rpcs on the new singleton master, whose responses are
being handled correctly. JIRA filed here:
https://jira.jboss.org/jira/browse/MODCLUSTER-85
I presume that this stream of NPEs only occurs for a brief period. Is
that correct?
On Mon, 2009-07-27 at 21:27 +0200, Marek Goldmann wrote:
Hi,
I got today a NullPointerException:
java.lang.NullPointerException at
org.jboss.modcluster.ha.HAModClusterService
$
ClusteredCatalinaEventHandler
.updateClusterStatus(HAModClusterService.java:896) at
org.jboss.modcluster.ha.HAModClusterService
$ClusteredCatalinaEventHandler.status(HAModClusterService.java:836) at
org.jboss.modcluster.ha.HAModClusterService
$ClusteredCatalinaEventHandler.status(HAModClusterService.java:781) at
org
.jboss
.modcluster
.CatalinaEventHandlerAdapter
.lifecycleEvent(CatalinaEventHandlerAdapter.java:157) at
org
.apache
.catalina
.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at
org
.apache
.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:
1348) at org.apache.catalina.core.ContainerBase
$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1612)
at org.apache.catalina.core.ContainerBase
$ContainerBackgroundProcessor.run(ContainerBase.java:1601) at
java.lang.Thread.run(Thread.java:636)
JBoss AS log is here: http://pastie.org/560597
What could be the reason for that? I'm using mod_cluster 1.0.0.GA.