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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (CASSANDRA-8308) Windows: Commitlog access violations on unit tests
Date Sun, 01 Feb 2015 08:30:34 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Stupp reopened CASSANDRA-8308:
-------------------------------------

[~JoshuaMcKenzie] cassci now also complains about TimeoutExceptions (http://cassci.datastax.com/job/trunk_utest/1353/testReport/
and various previous builds).

I digged a bit more into it and have a patch that solves the TimeoutException-problem: https://gist.github.com/snazy/6f2f8203ca4ab7c19422
and a branch https://github.com/snazy/cassandra/tree/8308-post-fix
The good: the problem does only affect unit tests - not the production code.

Background:
Sometimes {{CommitLogSegmentManager.resetUnsafe()}} produces a deadlock - when depends on
'random' - i.e. when {{COMMIT-LOG-ALLOCATOR}} thread works against data 'corrupted' by {{resetUnsafe}}.
The patch of {{resetUnsafe}} just shuts down {{COMMIT-LOG-ALLOCATOR}} thread, does its work
and restarts {{COMMIT-LOG-ALLOCATOR}}.

> Windows: Commitlog access violations on unit tests
> --------------------------------------------------
>
>                 Key: CASSANDRA-8308
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8308
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Joshua McKenzie
>            Assignee: Joshua McKenzie
>            Priority: Minor
>              Labels: Windows
>             Fix For: 3.0
>
>         Attachments: 8308_v1.txt, 8308_v2.txt, 8308_v3.txt
>
>
> We have four unit tests failing on trunk on Windows, all with FileSystemException's related
to the SchemaLoader:
> {noformat}
> [junit] Test org.apache.cassandra.db.compaction.DateTieredCompactionStrategyTest FAILED
> [junit] Test org.apache.cassandra.cql3.ThriftCompatibilityTest FAILED
> [junit] Test org.apache.cassandra.io.sstable.SSTableRewriterTest FAILED
> [junit] Test org.apache.cassandra.repair.LocalSyncTaskTest FAILED
> {noformat}
> Example error:
> {noformat}
>     [junit] Caused by: java.nio.file.FileSystemException: build\test\cassandra\commitlog;0\CommitLog-5-1415908745965.log:
The process cannot access the file because it is being used by another process.
>     [junit]
>     [junit]     at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
>     [junit]     at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
>     [junit]     at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
>     [junit]     at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
>     [junit]     at sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
>     [junit]     at java.nio.file.Files.delete(Files.java:1079)
>     [junit]     at org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:125)
> {noformat}



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