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https://issues.apache.org/jira/browse/ACCUMULO-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14092938#comment-14092938
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John Vines commented on ACCUMULO-1628:
--------------------------------------
FYI, this still occurs and it presents as itself as an NPE coming up through
continueMultiScan.
Maybe this can be handled by changing the switched flag ot a shared object so
taht way all clones know when it flips?
> NPE on deep copied dumped memory iterator
> -----------------------------------------
>
> Key: ACCUMULO-1628
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1628
> Project: Accumulo
> Issue Type: Bug
> Affects Versions: 1.4.0, 1.5.0
> Reporter: Keith Turner
> Priority: Critical
> Fix For: 1.5.2, 1.6.1, 1.7.0
>
> Attachments: bpopp-ACCUMULO-1628.log
>
>
> Accumulo may dump memory while a scan is running and transparently switch
> iterators from memory to file. If an iterator calls deepcopy after this
> happens, then seek will fail on the deep copy.
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.accumulo.server.tabletserver.InMemoryMap$MemoryDataSource.iterator(InMemoryMap.java:349)
> at
> org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.seek(SourceSwitchingIterator.java:163)
> {noformat}
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