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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10579) IndexOutOfBoundsException during memtable flushing at startup (with offheap_objects)
Date Mon, 26 Oct 2015 14:24:28 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14974273#comment-14974273
] 

Benedict commented on CASSANDRA-10579:
--------------------------------------

I've pushed a branch [here|https://github.com/belliottsmith/cassandra/tree/10579-debug] that
will print some information when this occurs that may help us pin down what is happening,
or at least point is in the direction of where to look next.

If you could run this branch while trying to replay one of these broken commit log segments,
it would give us something to investigate. Otherwise, if you send us your schema and one of
the broken commit log segments, I can try to reproduce it locally.

> 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
>          Components: Core
>         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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