cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Andreas Schnitzerling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6283) Windows 7 data files keept open / can't be deleted after compaction.
Date Thu, 20 Feb 2014 09:50:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906818#comment-13906818
] 

Andreas Schnitzerling commented on CASSANDRA-6283:
--------------------------------------------------

So the repair issue (with snapshots) is another problem compared to the compaction issue,
where my finalizer patch works perfectly in normal operation and shows, that handles are not
closed from C* ? Relying to compaction issue, if C* generates a tmp folder, there will be
thousands of files (I had for instance more than 64K files in one KS w/o finalizer patch).
Is that a good idea for the operating system, when C* is running for weeks?

> Windows 7 data files keept 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: 2.0.6
>
>         Attachments: leakdetect.patch, 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.



--
This message was sent by Atlassian JIRA
(v6.1.5#6160)

Mime
View raw message