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From "John Vines (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1628) NPE on deep copied dumped memory iterator
Date Tue, 12 Aug 2014 16:35:14 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14094279#comment-14094279
] 

John Vines commented on ACCUMULO-1628:
--------------------------------------

Bottom of it {code}Caused by: java.lang.NullPointerException
at org.apache.accumulo.tserver.InMemoryMap$MemoryDataSource.iterator(InMemoryMap.java:547)
at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.seek(SourceSwitchingIterator.java:163)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.SkippingIterator.seek(SkippingIterator.java:37)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.system.MultiIterator.seek(MultiIterator.java:105)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.system.StatsIterator.seek(StatsIterator.java:64)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.system.DeletingIterator.seek(DeletingIterator.java:67)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.SkippingIterator.seek(SkippingIterator.java:37)
at org.apache.accumulo.core.iterators.system.ColumnFamilySkippingIterator.seek(ColumnFamilySkippingIterator.java:123)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.Filter.seek(Filter.java:64)
at org.apache.accumulo.core.iterators.WrappingIterator.seek(WrappingIterator.java:101)
at org.apache.accumulo.core.iterators.Filter.seek(Filter.java:64)
at org.apache.accumulo.core.iterators.system.SynchronizedIterator.seek(SynchronizedIterator.java:55){code}

> 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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