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https://issues.apache.org/jira/browse/CASSANDRA-10579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985202#comment-14985202
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Benedict commented on CASSANDRA-10579:
--------------------------------------
Good point. In fact, strengthening that position, it is already returning an
unsigned short for architectures not supporting unaligned memory accesses. So
it is definitely an oversight in the original API implementation.
I've pushed an update that fixes the {{MemoryUtil.getShort}} for unaligned
accesses, and removed the propagation to call-sites.
> 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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