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https://reviews.apache.org/r/24741/
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Review request for accumulo.
Bugs: ACCUMULO-1628
https://issues.apache.org/jira/browse/ACCUMULO-1628
Repository: accumulo
Description
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Bug fix for ACCUMULO-1628. If no activity on review by 8/20 I will push patch.
I was concerned about the case where two threads will concurrently switch
different deep copies. There is the scan thread and the thread deleting in
mem map and calling switchNow on each deepCopy. Access to each deep copy is
synchronized, so thats fine. This patch modified the deep copies to use a
shared rfile. I think deep copy of the shared rfile is synchronized properly.
The shared rfile was introduced to get around problems with the temp file
being deleted.
Diffs
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core/src/main/java/org/apache/accumulo/core/iterators/system/SourceSwitchingIterator.java
a4970dc
server/src/main/java/org/apache/accumulo/server/tabletserver/InMemoryMap.java
914cd85
server/src/test/java/org/apache/accumulo/server/tabletserver/InMemoryMapTest.java
97c8eec
Diff: https://reviews.apache.org/r/24741/diff/
Testing
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A unit test was added that reproduced the bug. After changes in patch, unit
test no longer reproduces bug.
mvn package runs w/o a problem
Thanks,
kturner
