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Posted to commits@cassandra.apache.org by "Benjamin Lerer (JIRA)" <ji...@apache.org> on 2015/03/30 17:17:53 UTC
[jira] [Commented] (CASSANDRA-8978) CQLSSTableWriter causes
ArrayIndexOutOfBoundsException
[ https://issues.apache.org/jira/browse/CASSANDRA-8978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386848#comment-14386848 ]
Benjamin Lerer commented on CASSANDRA-8978:
-------------------------------------------
@Carl I do not fully understand the problem that you describe. Could you explain a bit more where is the race condition and how it trigger the ArrayIndexOutOfBoundException?
> CQLSSTableWriter causes ArrayIndexOutOfBoundsException
> ------------------------------------------------------
>
> Key: CASSANDRA-8978
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8978
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: 3.8.0-42-generic #62~precise1-Ubuntu SMP Wed Jun 4 22:04:18 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> java version "1.8.0_20"
> Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
> Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)
> Reporter: Thomas Borg Salling
> Assignee: Carl Yeksigian
> Fix For: 2.1.4
>
> Attachments: 8978-2.1.txt
>
>
> On long-running jobs with CQLSSTableWriter preparing sstables for later bulk load via sstableloader, occassionally I get the sporadic error shown below.
> I can run the exact same job again - and it will succeed or fail with the same error at another location in the input stream. The error is appears to occur "randomly" - with the same input it may occur never, early or late in the run with no apparent logic or system.
> I use five instances of CQLSSTableWriter in the application (to write redundantly to five different tables). But these instances do not exist at the same time; and thus never used concurrently.
> {code}
> 09:26:33.582 [main] INFO d.dma.ais.store.FileSSTableConverter - Finished processing directory, 369582175 packets was converted from /nas1/
> Exception in thread "main" java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:483)
> at dk.dma.commons.app.CliCommandList$1.execute(CliCommandList.java:50)
> at dk.dma.commons.app.CliCommandList.invoke(CliCommandList.java:80)
> at dk.dma.ais.store.Main.main(Main.java:34)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 297868
> at org.apache.cassandra.db.ArrayBackedSortedColumns.append(ArrayBackedSortedColumns.java:196)
> at org.apache.cassandra.db.ArrayBackedSortedColumns.appendOrReconcile(ArrayBackedSortedColumns.java:191)
> at org.apache.cassandra.db.ArrayBackedSortedColumns.sortCells(ArrayBackedSortedColumns.java:176)
> at org.apache.cassandra.db.ArrayBackedSortedColumns.maybeSortCells(ArrayBackedSortedColumns.java:125)
> at org.apache.cassandra.db.ArrayBackedSortedColumns.access$1100(ArrayBackedSortedColumns.java:44)
> at org.apache.cassandra.db.ArrayBackedSortedColumns$CellCollection.iterator(ArrayBackedSortedColumns.java:622)
> at org.apache.cassandra.db.ColumnFamily.iterator(ColumnFamily.java:476)
> at org.apache.cassandra.db.ColumnIndex$Builder.build(ColumnIndex.java:129)
> at org.apache.cassandra.io.sstable.SSTableWriter.rawAppend(SSTableWriter.java:233)
> at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:218)
> at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:215){code}
> So far I overcome this problem by simply retrying with another run of the application in attempt to generate the sstables. But this is a rather time consuming and shaky approach - and I feel a bit uneasy relying on the produced sstables, though their contents appear to be correct when I sample them with cqlsh 'select' after load into Cassandra.
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