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Posted to commits@cassandra.apache.org by "Vladimir Bukhtoyarov (JIRA)" <ji...@apache.org> on 2018/09/21 10:59:00 UTC
[jira] [Created] (CASSANDRA-14773) Overflow of 32-bit integer
during compaction.
Vladimir Bukhtoyarov created CASSANDRA-14773:
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Summary: Overflow of 32-bit integer during compaction.
Key: CASSANDRA-14773
URL: https://issues.apache.org/jira/browse/CASSANDRA-14773
Project: Cassandra
Issue Type: Bug
Components: Compaction
Reporter: Vladimir Bukhtoyarov
Fix For: 4.x
In scope of CASSANDRA-13444 the compaction was significantly improved from CPU and memory perspective. Hovewer this improvement introduces the bug in rounding. When rounding the expriration time which is close to *Cell.MAX_DELETION_TIME*(it is just *Integer.MAX_VALUE*) the math overflow happens, as result point became negative and acts as silent poison for internal structures of StreamingTombstoneHistogramBuilder like *DistanceHolder* and *DataHolder*. Then depending of point intervals:
* The TombstoneHistogram produces wrong values when interval of points is less then binSize, it is not critical.
* Compaction crashes with ArrayIndexOutOfBoundsException if amount of point intervals is great then binSize, this case is very critical.
This is pull request [https://github.com/apache/cassandra/pull/273] that reproduces the issue and provides the fix.
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