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https://issues.apache.org/jira/browse/CASSANDRA-10579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985226#comment-14985226
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Benedict commented on CASSANDRA-10579:
--------------------------------------
No. I should have mentioned that. That's another bug that was exhibited by the
stack trace provided by [~jeffery.griffith], and as a result should be fixed at
the same time IMO. The {{apply}} happens twice, when it should only happen
once. This means we're wasting space in the offheap memtables, as we copy the
data twice. It's also a waste of cycles. The stack trace above would never have
been encountered without this bug, so it's within scope of the ticket. Mea
culpa for not calling it out (I actually forgot I'd done it, despite its
importance)
> IndexOutOfBoundsException during memtable flushing at startup (with
> offheap_objects)
> ------------------------------------------------------------------------------------
>
> Key: CASSANDRA-10579
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10579
> Project: Cassandra
> Issue Type: Bug
> Environment: 2.1.10 on linux
> Reporter: Jeff Griffith
> Assignee: Benedict
> Fix For: 2.1.x
>
>
> Sometimes we have problems at startup where memtable flushes with an index
> out of bounds exception as seen below. Cassandra is then dead in the water
> until we track down the corresponding commit log via the segment ID and
> remove it:
> {code}
> INFO [main] 2015-10-23 14:43:36,440 CommitLogReplayer.java:267 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832692.log
> INFO [main] 2015-10-23 14:43:36,440 CommitLogReplayer.java:270 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832692.log (CL version 4,
> messaging version 8)
> INFO [main] 2015-10-23 14:43:36,594 CommitLogReplayer.java:478 - Finished
> reading /home/y/var/cassandra/commitlog/CommitLog-4-1445474832692.log
> INFO [main] 2015-10-23 14:43:36,594 CommitLogReplayer.java:267 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832693.log
> INFO [main] 2015-10-23 14:43:36,595 CommitLogReplayer.java:270 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832693.log (CL version 4,
> messaging version 8)
> INFO [main] 2015-10-23 14:43:36,699 CommitLogReplayer.java:478 - Finished
> reading /home/y/var/cassandra/commitlog/CommitLog-4-1445474832693.log
> INFO [main] 2015-10-23 14:43:36,699 CommitLogReplayer.java:267 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832694.log
> INFO [main] 2015-10-23 14:43:36,699 CommitLogReplayer.java:270 - Replaying
> /home/y/var/cassandra/commitlog/CommitLog-4-1445474832694.log (CL version 4,
> messaging version 8)
> WARN [SharedPool-Worker-5] 2015-10-23 14:43:36,747
> AbstractTracingAwareExecutorService.java:169 - Uncaught exception on thread
> Thread[SharedPool-Worker-5,5,main]: {}
> java.lang.ArrayIndexOutOfBoundsException: 6
> at
> org.apache.cassandra.db.AbstractNativeCell.nametype(AbstractNativeCell.java:204)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.AbstractNativeCell.isStatic(AbstractNativeCell.java:199)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.composites.AbstractCType.compare(AbstractCType.java:166)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.composites.AbstractCellNameType$1.compare(AbstractCellNameType.java:61)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.composites.AbstractCellNameType$1.compare(AbstractCellNameType.java:58)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.utils.btree.BTree.find(BTree.java:277)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.utils.btree.NodeBuilder.update(NodeBuilder.java:154)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.utils.btree.Builder.update(Builder.java:74)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.utils.btree.BTree.update(BTree.java:186)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.AtomicBTreeColumns.addAllWithSizeDelta(AtomicBTreeColumns.java:225)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.db.Memtable.put(Memtable.java:210)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1225)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:396)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:359)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.db.commitlog.CommitLogReplayer$1.runMayThrow(CommitLogReplayer.java:455)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_31]
> at
> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
> ~[apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-2.1.10.jar:2.1.10-SNAPSHOT]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_31]
> {code}
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