Hi all,
the application I have written, when handling exceptions in one part,
performs a cache operation (setting a node's value) to inform the other members
of the cluster as to what is happening with a resource shared amongst the
cluster.
everything looks and acts fine, then a minute or two later after the dust has
settled, a warning pops up in server.log
17:56:19,454 WARN [TreeCache] status is 1 (not ACTIVE or PREPARING); returning
null)
java.lang.Throwable
at org.jboss.cache.TreeCache.getCurrentTransaction(TreeCache.java:5805)
at org.jboss.cache.TreeCache.getCurrentTransaction(TreeCache.java:5775)
at org.jboss.cache.TreeCache.put(TreeCache.java:3831)
at sun.reflect.GeneratedMethodAccessor116.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy56.put(Unknown Source)
at
com.mec.management.mbeans.TreeCacheFacade.setValue(TreeCacheFacade.java:296)
[and so on]
there are a few of these - it seems every cache related operation done while
handling an exception has problems. there is a transaction timeout message
before all this
17:55:17,034 WARN [TransactionImpl] Transaction
TransactionImpl:XidImpl[FormatId=257, GlobalId=xbod-app01.xb-online.com/37,
BranchQual=, localId=37] timed out. status=STATUS_ACTIVE
the cache is in REPL_SYNC mode, but I don't know what else to say as I'm not
sure what else is important
I am sensing that this general idea of using the cache to update information
within catch() blocks is not a good idea. I am lost as how to deal with this -
is there some general principles I should follow or should I move the cache
operation out of the exception handling all together (and how to?)?
yeah, they're only warnings but they look important. If someone could possibly
explain what is going on, I would greatly appreciate it
doug
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