Hi chris, christan,
Thanks for reply, i'm not using DSE.
I have in the log files, this error that appear two times.
ERROR [FlushWriter:3456] 2014-07-01 18:25:33,607 CassandraDaemon.java (line
196) Exception in thread Thread[FlushWriter:3456,5,main]
java.lang.AssertionError: 394920
at
org.apache.cassandra.utils.ByteBufferUtil.writeWithShortLength(ByteBufferUtil.java:342)
at
org.apache.cassandra.db.ColumnIndex$Builder.maybeWriteRowHeader(ColumnIndex.java:201)
at
org.apache.cassandra.db.ColumnIndex$Builder.add(ColumnIndex.java:188)
at
org.apache.cassandra.db.ColumnIndex$Builder.build(ColumnIndex.java:133)
at
org.apache.cassandra.io.sstable.SSTableWriter.rawAppend(SSTableWriter.java:202)
at
org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:187)
at
org.apache.cassandra.db.Memtable$FlushRunnable.writeSortedContents(Memtable.java:365)
at
org.apache.cassandra.db.Memtable$FlushRunnable.runWith(Memtable.java:318)
at
org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
It's the same error than this link
http://mail-archives.apache.org/mod_mbox/cassandra-user/201305.mbox/%3cbay169-w52699dd7a1c0007783f8d8a8...@phx.gbl%3E
,
with the same configuration 2 nodes RF 2 with SimpleStrategy.
Hope this help.
Thanks,
2014-07-16 1:49 GMT+02:00 Chris Lohfink <clohf...@blackbirdit.com>:
> The MemtablePostFlusher is also used for flushing non-cf backed (solr)
> indexes. Are you using DSE and solr by chance?
>
> Chris
>
> On Jul 15, 2014, at 5:01 PM, horschi <hors...@gmail.com> wrote:
>
> I have seen this behavour when Commitlog files got deleted (or permissions
> were set to read only).
>
> MemtablePostFlusher is the stage that marks the Commitlog as flushed. When
> they fail it usually means there is something wrong with the commitlog
> files.
>
> Check your logfiles for any commitlog related errors.
>
> regards,
> Christian
>
>
> On Tue, Jul 15, 2014 at 7:03 PM, Kais Ahmed <k...@neteck-fr.com> wrote:
>
>> Hi all,
>>
>> I have a small cluster (2 nodes RF 2) running with C* 2.0.6 on I2 Extra
>> Large (AWS) with SSD disk,
>> the nodetool tpstats shows many MemtablePostFlusher pending and
>> FlushWriter All time blocked.
>>
>> The two nodes have the default configuration. All CF use size-tiered
>> compaction strategy.
>>
>> There are 10 times more reads than writes (1300 reads/s and 150 writes/s).
>>
>>
>> ubuntu@node1 :~$ nodetool tpstats
>> Pool Name Active Pending Completed Blocked
>> All time blocked
>> MemtablePostFlusher 1 1158 159590
>> 0 0
>> FlushWriter 0 0 11568
>> 0 1031
>>
>> ubuntu@node1:~$ nodetool compactionstats
>> pending tasks: 90
>> Active compaction remaining time : n/a
>>
>>
>> ubuntu@node2:~$ nodetool tpstats
>> Pool Name Active Pending Completed Blocked
>> All time blocked
>> MemtablePostFlusher 1 1020 50987
>> 0 0
>> FlushWriter 0 0 6672
>> 0 948
>>
>>
>> ubuntu@node2:~$ nodetool compactionstats
>> pending tasks: 89
>> Active compaction remaining time : n/a
>>
>> I think there is something wrong, thank you for your help.
>>
>>
>
>
