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From "Zach Aller (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-7042) Disk space growth until restart
Date Tue, 22 Apr 2014 05:04:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13976392#comment-13976392
] 

Zach Aller edited comment on CASSANDRA-7042 at 4/22/14 5:02 AM:
----------------------------------------------------------------

Here is some screen shots for datastax opscenter. The dips are related to either running cleanup
or changing the gc_grace period down after learning that since we ttl all our data we don't
have to run repairs within gc_grace. You can see the spikes in the total disk space they will
basicly continue until it runs our of space or we restart cassandra.


was (Author: zaller):
Here is some screen shots for datastax opscenter. The dips are related to either running cleanup
or changing the gc_grace period down after learning that since we ttl all our data we don't
have to run repairs within gc_grace. You can see the spikes in the total disk space.

> Disk space growth until restart
> -------------------------------
>
>                 Key: CASSANDRA-7042
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7042
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Ubuntu 12.04
> Sun Java 7
> Cassandra 2.0.6
>            Reporter: Zach Aller
>         Attachments: Screen Shot 2014-04-17 at 11.07.24 AM.png, Screen Shot 2014-04-18
at 11.47.30 AM.png, after.log, before.log
>
>
> Cassandra will constantly eat disk space not sure whats causing it the only thing that
seems to fix it is a restart of cassandra this happens about every 3-5 hrs we will grow from
about 350GB to 650GB with no end in site. Once we restart cassandra it usually all clears
itself up and disks return to normal for a while then something triggers its and starts climbing
again. Sometimes when we restart compactions pending skyrocket and if we restart a second
time the compactions pending drop off back to a normal level. One other thing to note is the
space is not free'd until cassandra starts back up and not when shutdown.
> I will get a clean log of before and after restarting next time it happens and post it.
> Here is a common ERROR in our logs that might be related
> ERROR [CompactionExecutor:46] 2014-04-15 09:12:51,040 CassandraDaemon.java (line 196)
Exception in thread Thread[CompactionExecutor:46,1,main]
> java.lang.RuntimeException: java.io.FileNotFoundException: /local-project/cassandra_data/data/wxgrid/grid/wxgrid-grid-jb-468677-Data.db
(No such file or directory)
>         at org.apache.cassandra.io.util.ThrottledReader.open(ThrottledReader.java:53)
>         at org.apache.cassandra.io.sstable.SSTableReader.openDataReader(SSTableReader.java:1355)
>         at org.apache.cassandra.io.sstable.SSTableScanner.<init>(SSTableScanner.java:67)
>         at org.apache.cassandra.io.sstable.SSTableReader.getScanner(SSTableReader.java:1161)
>         at org.apache.cassandra.io.sstable.SSTableReader.getScanner(SSTableReader.java:1173)
>         at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getScanners(LeveledCompactionStrategy.java:194)
>         at org.apache.cassandra.db.compaction.AbstractCompactionStrategy.getScanners(AbstractCompactionStrategy.java:258)
>         at org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:126)
>         at org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
>         at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
>         at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:60)
>         at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:59)
>         at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run(CompactionManager.java:197)
>         at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
>         at java.util.concurrent.FutureTask.run(Unknown Source)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>         at java.lang.Thread.run(Unknown Source)
> Caused by: java.io.FileNotFoundException: /local-project/cassandra_data/data/wxgrid/grid/wxgrid-grid-jb-468677-Data.db
(No such file or directory)
>         at java.io.RandomAccessFile.open(Native Method)
>         at java.io.RandomAccessFile.<init>(Unknown Source)
>         at org.apache.cassandra.io.util.RandomAccessReader.<init>(RandomAccessReader.java:58)
>         at org.apache.cassandra.io.util.ThrottledReader.<init>(ThrottledReader.java:35)
>         at org.apache.cassandra.io.util.ThrottledReader.open(ThrottledReader.java:49)
>         ... 17 more



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