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https://issues.apache.org/jira/browse/CASSANDRA-606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12786556#action_12786556
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Jonathan Ellis edited comment on CASSANDRA-606 at 12/6/09 1:45 AM:
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+1 v2
was (Author: jbellis):
+1
> Compaction can't find files
> ---------------------------
>
> Key: CASSANDRA-606
> URL: https://issues.apache.org/jira/browse/CASSANDRA-606
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.5
> Reporter: Chris Goffinet
> Fix For: 0.5
>
> Attachments:
> 0001-ColumnFamily.onStart-was-not-checking-files-related-.patch,
> 0001-v2-ColumnFamily.onStart-was-not-checking-files-related-.patch
>
>
> We have been seeing issues with compaction running very often. We ran into
> this case when I found out in one of our CFs we were inserting a high volume
> of columns. Our threshold for memtable size flushes is 64MB but the
> MemtableObjectCountInMillions is 0.1 (we know this is low and will increase).
> On average we are writing so much data that compaction kicks off reguarly.
> And when we start trying to lookup data, we get lots of errors during
> compaction and get_slice (since sometimes files don't get cleaned up). In
> every event that this has occurred, a -Filter file was left behind. Never
> Data or Index.
> ERROR [COMPACTION-POOL:1] 2009-12-05 15:04:47,412
> DebuggableThreadPoolExecutor.java (line 120) Error in executor futuretask
> java.util.concurrent.ExecutionException: java.io.FileNotFoundException:
> /mnt/var/cassandra/data/Digg/UserActivity-1243-Data.db (No such file or
> directory)
> at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
> at java.util.concurrent.FutureTask.get(FutureTask.java:83)
> at
> org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:112)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.io.FileNotFoundException:
> /mnt/var/cassandra/data/Digg/UserActivity-1243-Data.db (No such file or
> directory)
> at java.io.RandomAccessFile.open(Native Method)
> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:98)
> at
> org.apache.cassandra.io.BufferedRandomAccessFile.<init>(BufferedRandomAccessFile.java:142)
> at
> org.apache.cassandra.io.SSTableScanner.<init>(SSTableScanner.java:47)
> at
> org.apache.cassandra.io.SSTableReader.getScanner(SSTableReader.java:386)
> at
> org.apache.cassandra.io.CompactionIterator.getCollatingIterator(CompactionIterator.java:65)
> at
> org.apache.cassandra.io.CompactionIterator.<init>(CompactionIterator.java:48)
> at
> org.apache.cassandra.db.ColumnFamilyStore.doFileCompaction(ColumnFamilyStore.java:902)
> at
> org.apache.cassandra.db.ColumnFamilyStore.doFileCompaction(ColumnFamilyStore.java:861)
> at
> org.apache.cassandra.db.ColumnFamilyStore.doCompaction(ColumnFamilyStore.java:663)
> at
> org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:180)
> at
> org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:177)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> ... 2 more
> INFO [main] 2009-12-05 15:08:54,384 SSTable.java (line 156) Deleted
> /mnt/var/cassandra/data/Digg/UserActivity-1130-Data.db
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