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
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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