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https://issues.apache.org/jira/browse/GEODE-625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15264736#comment-15264736
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Dan Smith commented on GEODE-625:
---------------------------------
A little be more context on this:
It looks like the current behavior if you call ResultSender.sendResult with an
exception then the exception is never actually propagated to the user's
ResultCollector. Instead, it's hidden from the user's ResultCollector but
thrown from the getResult method of the ResultCollector returned by
Execution.execute(). That's the same behavior you get if you simply throw an
exception from the body of the function.
On the other hand, if you call sendException, then the exception *is* passed to
the addResult method of the users ResultCollector, and does not throw an
exception.
This seems somewhat backwards. It seems *anything* passed to sendResult and
lastResult ought to be passed on to the addResult method of the
ResultCollector. sendException should perhaps trigger the exception behavior we
are seeing from the default result collector, or be passed to something like an
addException method on a user's result collector.
Unfortunately, it will be hard to get to the desired behavior in a backwards
compatible way.
> A function's ResultCollector throws ClassCastException when
> ResultSender.sendException is invoked
> -------------------------------------------------------------------------------------------------
>
> Key: GEODE-625
> URL: https://issues.apache.org/jira/browse/GEODE-625
> Project: Geode
> Issue Type: Bug
> Components: functions
> Reporter: Ashvin
> Assignee: Dan Smith
>
> For e.g. If LuceneFunction.execute invokes resultSender.sendException, the
> following error is generated.
> {code}
> java.lang.ClassCastException: java.lang.IllegalArgumentException cannot be
> cast to com.gemstone.gemfire.cache.lucene.int
> ernal.distributed.TopEntriesCollector
> at
> com.gemstone.gemfire.cache.lucene.internal.distributed.TopEntriesFunctionCollector.addResult(TopEntriesFunctionColle
> ctor.java:1)
> at
> com.gemstone.gemfire.internal.cache.execute.LocalResultCollectorImpl.addResult(LocalResultCollectorImpl.java:76)
> at
> com.gemstone.gemfire.internal.cache.execute.PartitionedRegionFunctionResultSender.lastResult(PartitionedRegionFuncti
> onResultSender.java:208)
> at
> com.gemstone.gemfire.internal.cache.execute.PartitionedRegionFunctionResultSender.lastResult(PartitionedRegionFuncti
> onResultSender.java:166)
> at
> com.gemstone.gemfire.internal.cache.execute.PartitionedRegionFunctionResultSender.sendException(PartitionedRegionFun
> ctionResultSender.java:301)
> at
> com.gemstone.gemfire.cache.lucene.internal.distributed.LuceneFunction.execute(LuceneFunction.java:52)
> {code}
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