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From "Joshua McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-6283) Windows 7 data files kept open / can't be deleted after compaction.
Date Thu, 01 May 2014 00:12:17 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joshua McKenzie resolved CASSANDRA-6283.
----------------------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 2.0.8)
                   3.0
    Reproduced In: 2.0.3, 2.0.2, 2.1.0  (was: 2.0.2, 2.0.3, 2.1.0)

Reference CASSANDRA-6993 and CASSANDRA-4050 for patches, CASSANDRA-6890 for performance #'s.

> Windows 7 data files kept open / can't be deleted after compaction.
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-6283
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6283
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Windows 7 (32) / Java 1.7.0.45
>            Reporter: Andreas Schnitzerling
>            Assignee: Joshua McKenzie
>              Labels: compaction
>             Fix For: 3.0
>
>         Attachments: 6283_StreamWriter_patch.txt, leakdetect.patch, neighbor-log.zip,
root-log.zip, screenshot-1.jpg, system.log
>
>
> Files cannot be deleted, patch CASSANDRA-5383 (Win7 deleting problem) doesn't help on
Win-7 on Cassandra 2.0.2. Even 2.1 Snapshot is not running. The cause is: Opened file handles
seem to be lost and not closed properly. Win 7 blames, that another process is still using
the file (but its obviously cassandra). Only restart of the server makes the files deleted.
But after heavy using (changes) of tables, there are about 24K files in the data folder (instead
of 35 after every restart) and Cassandra crashes. I experiminted and I found out, that a finalizer
fixes the problem. So after GC the files will be deleted (not optimal, but working fine).
It runs now 2 days continously without problem. Possible fix/test:
> I wrote the following finalizer at the end of class org.apache.cassandra.io.util.RandomAccessReader:
> {code:title=RandomAccessReader.java|borderStyle=solid}
> @Override
> protected void finalize() throws Throwable {
> 	deallocate();
> 	super.finalize();
> }
> {code}
> Can somebody test / develop / patch it? Thx.



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