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Alexey Zotov commented on CASSANDRA-15669: ------------------------------------------ [~blerer] [~marcuse] could you please take a look to the PR and let me know whether it is good to merge or any other changes are required. > 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 > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org