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Posted to commits@cassandra.apache.org by "Alexey Zotov (Jira)" <ji...@apache.org> on 2021/05/05 04:21:00 UTC
[jira] [Commented] (CASSANDRA-15669) LeveledCompactionStrategy
compact last level throw an ArrayIndexOutOfBoundsException
[ https://issues.apache.org/jira/browse/CASSANDRA-15669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17339393#comment-17339393 ]
Alexey Zotov commented on CASSANDRA-15669:
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Thanks [~yifanc]! Please, let me know if I need to make any other changes like squashing or updating {{CHANGES.txt}}.
> LeveledCompactionStrategy compact last level throw an ArrayIndexOutOfBoundsException
> ------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15669
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15669
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Compaction/LCS
> Reporter: sunhaihong
> Assignee: Alexey Zotov
> Priority: Normal
> Fix For: 3.11.x, 4.0.x
>
> Attachments: cfs_compaction_info.png, error_info.png
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Cassandra will throw an ArrayIndexOutOfBoundsException when compact last level.
> My test is as follows:
> # Create a table with LeveledCompactionStrategy and its params are 'enabled': 'true', 'fanout_size': '2', 'max_threshold': '32', 'min_threshold': '4', 'sstable_size_in_mb': '2'(fanout_size and sstable_size_in_mb are too small just to make it easier to reproduce the problem);
> # Insert data into the table by stress;
> # Cassandra throw an ArrayIndexOutOfBoundsException when compact level9 sstables(this level score bigger than 1.001)
> ERROR [CompactionExecutor:4] 2020-03-28 08:59:00,990 CassandraDaemon.java:442 - Exception in thread Thread[CompactionExecutor:4,1,main]
> java.lang.ArrayIndexOutOfBoundsException: 9
> at org.apache.cassandra.db.compaction.LeveledManifest.getLevel(LeveledManifest.java:814)
> at org.apache.cassandra.db.compaction.LeveledManifest.getCandidatesFor(LeveledManifest.java:746)
> at org.apache.cassandra.db.compaction.LeveledManifest.getCompactionCandidates(LeveledManifest.java:398)
> at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:131)
> at org.apache.cassandra.db.compaction.CompactionStrategyHolder.lambda$getBackgroundTaskSuppliers$0(CompactionStrategyHolder.java:109)
> at org.apache.cassandra.db.compaction.AbstractStrategyHolder$TaskSupplier.getTask(AbstractStrategyHolder.java:66)
> at org.apache.cassandra.db.compaction.CompactionStrategyManager.getNextBackgroundTask(CompactionStrategyManager.java:214)
> at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:289)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
> at java.util.concurrent.FutureTask.run(FutureTask.java)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.lang.Thread.run(Thread.java:748)
> I tested it on cassandra version 3.11.3 & 4.0-alpha3. The exception all happened.
> once it triggers, level1- leveln compaction no longer works, level0 is still valid
>
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