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https://issues.apache.org/jira/browse/ACCUMULO-4502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15644454#comment-15644454
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Josh Elser commented on ACCUMULO-4502:
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bq. I thing you said it when you said "re-initialized to use the local memdump
file and then re-seek()'ed." It is the seek call that results in everything
getting setup.
No, this doesn't answer my question, Ivan. The re-seek will re-initialize the
MemoryIterator, but I don't believe the parent HeapIterator/MultiIterator gets
reinitialized as a part of this process. If I'm correct with this hunch, I
don't see how topIdx in HeapIterator is getting modified when MemoryIterator is
switched from memory to disk.
I was hoping that you could show me some series of method calls which, after
MemoryIterators are {{switchNow()}}'d, the HeapIterator's {{topIdx}} would be
modified. Maybe this is all moot given Keith's comments though.
> Called next when there is no top
> --------------------------------
>
> Key: ACCUMULO-4502
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4502
> Project: Accumulo
> Issue Type: Bug
> Components: core, tserver
> Affects Versions: 1.6.6
> Reporter: Ivan Bella
> Assignee: Ivan Bella
> Fix For: 1.7.3, 1.8.1, 2.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> This happens very rarely but we have seen the following exception (pulled
> from a server running 1.6.4). Looking at the code I believe this condition
> can still happen in 1.8.0:
> java.util.concurrent.ExecutionException: java.lang.IllegalStateException:
> Called next() when there is no top
> ...
> Caused by: java.lang.IllegalStateException: Called next() when there is no top
> HeapIterator.next(HeapIterator.java: 77)
> WrappingIterator.next(WrappingIterator.java: 96)
> MemKeyConversionIterator.next(InMemoryMap.java:162)
> SourceSwitchingIterator.readNext(SourceSwitchingIterator.java: 139)
> SourceSwitchingIterator.next(SourceSwitchingIterator.java: 123)
> PartialMutationSkippingIterator.consume(InMemoryMap.java:108)
> SkippingIterator.seek(SkippingIterator.java:43)
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