Compaction does, but flush didn't until https://issues.apache.org/jira/browse/CASSANDRA-2404
On Tue, May 3, 2011 at 2:26 PM, Terje Marthinussen <tmarthinus...@gmail.com> wrote: > Yes, I realize that. > I am bit curious why it ran out of disk, or rather, why I have 200GB empty > disk now, but unfortunately it seems like we may not have had monitoring > enabled on this node to tell me what happened in terms of disk usage. > I also thought that compaction was supposed to resume (try again with less > data) if it fails? > Terje > > On Wed, May 4, 2011 at 3:50 AM, Jonathan Ellis <jbel...@gmail.com> wrote: >> >> post flusher is responsible for updating commitlog header after a >> flush; each task waits for a specific flush to complete, then does its >> thing. >> >> so when you had a flush catastrophically fail, its corresponding >> post-flush task will be stuck. >> >> On Tue, May 3, 2011 at 1:20 PM, Terje Marthinussen >> <tmarthinus...@gmail.com> wrote: >> > Just some very tiny amount of writes in the background here (some hints >> > spooled up on another node slowly coming in). >> > No new data. >> > >> > I thought there was no exceptions, but I did not look far enough back in >> > the >> > log at first. >> > Going back a bit further now however, I see that about 50 hours ago: >> > ERROR [CompactionExecutor:387] 2011-05-02 01:16:01,027 >> > AbstractCassandraDaemon.java (line 112) Fatal exception in thread >> > Thread[CompactionExecutor:387,1,main] >> > java.io.IOException: No space left on device >> > at java.io.RandomAccessFile.writeBytes(Native Method) >> > at java.io.RandomAccessFile.write(RandomAccessFile.java:466) >> > at >> > >> > org.apache.cassandra.io.util.BufferedRandomAccessFile.flush(BufferedRandomAccessFile.java:160) >> > at >> > >> > org.apache.cassandra.io.util.BufferedRandomAccessFile.reBuffer(BufferedRandomAccessFile.java:225) >> > at >> > >> > org.apache.cassandra.io.util.BufferedRandomAccessFile.writeAtMost(BufferedRandomAccessFile.java:356) >> > at >> > >> > org.apache.cassandra.io.util.BufferedRandomAccessFile.write(BufferedRandomAccessFile.java:335) >> > at >> > org.apache.cassandra.io.PrecompactedRow.write(PrecompactedRow.java:102) >> > at >> > >> > org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:130) >> > at >> > >> > org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:566) >> > at >> > >> > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:146) >> > at >> > >> > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:112) >> > at >> > java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) >> > at java.util.concurrent.FutureTask.run(FutureTask.java:138) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) >> > at java.lang.Thread.run(Thread.java:662) >> > [followed by a few more of those...] >> > and then a bunch of these: >> > ERROR [FlushWriter:123] 2011-05-02 01:21:12,690 >> > AbstractCassandraDaemon.java >> > (line 112) Fatal exception in thread Thread[FlushWriter:123,5,main] >> > java.lang.RuntimeException: java.lang.RuntimeException: Insufficient >> > disk >> > space to flush 40009184 bytes >> > at >> > org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) >> > at >> > >> > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) >> > at java.lang.Thread.run(Thread.java:662) >> > Caused by: java.lang.RuntimeException: Insufficient disk space to flush >> > 40009184 bytes >> > at >> > >> > org.apache.cassandra.db.ColumnFamilyStore.getFlushPath(ColumnFamilyStore.java:597) >> > at >> > >> > org.apache.cassandra.db.ColumnFamilyStore.createFlushWriter(ColumnFamilyStore.java:2100) >> > at >> > org.apache.cassandra.db.Memtable.writeSortedContents(Memtable.java:239) >> > at org.apache.cassandra.db.Memtable.access$400(Memtable.java:50) >> > at >> > org.apache.cassandra.db.Memtable$3.runMayThrow(Memtable.java:263) >> > at >> > org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30) >> > ... 3 more >> > Seems like compactions stopped after this (a bunch of tmp tables there >> > still >> > from when those errors where generated), and I can only suspect the post >> > flusher may have stopped at the same time. >> > There is 890GB of disk for data, sstables are currently using 604G >> > (139GB is >> > old tmp tables from when it ran out of disk) and "ring" tells me the >> > load on >> > the node is 313GB. >> > Terje >> > >> > >> > On Wed, May 4, 2011 at 3:02 AM, Jonathan Ellis <jbel...@gmail.com> >> > wrote: >> >> >> >> ... and are there any exceptions in the log? >> >> >> >> On Tue, May 3, 2011 at 1:01 PM, Jonathan Ellis <jbel...@gmail.com> >> >> wrote: >> >> > Does it resolve down to 0 eventually if you stop doing writes? >> >> > >> >> > On Tue, May 3, 2011 at 12:56 PM, Terje Marthinussen >> >> > <tmarthinus...@gmail.com> wrote: >> >> >> Cassandra 0.8 beta trunk from about 1 week ago: >> >> >> Pool Name Active Pending Completed >> >> >> ReadStage 0 0 5 >> >> >> RequestResponseStage 0 0 87129 >> >> >> MutationStage 0 0 187298 >> >> >> ReadRepairStage 0 0 0 >> >> >> ReplicateOnWriteStage 0 0 0 >> >> >> GossipStage 0 0 1353524 >> >> >> AntiEntropyStage 0 0 0 >> >> >> MigrationStage 0 0 10 >> >> >> MemtablePostFlusher 1 190 108 >> >> >> StreamStage 0 0 0 >> >> >> FlushWriter 0 0 302 >> >> >> FILEUTILS-DELETE-POOL 0 0 26 >> >> >> MiscStage 0 0 0 >> >> >> FlushSorter 0 0 0 >> >> >> InternalResponseStage 0 0 0 >> >> >> HintedHandoff 1 4 7 >> >> >> >> >> >> Anyone with nice theories about the pending value on the memtable >> >> >> post >> >> >> flusher? >> >> >> Regards, >> >> >> Terje >> >> > >> >> > >> >> > >> >> > -- >> >> > Jonathan Ellis >> >> > Project Chair, Apache Cassandra >> >> > co-founder of DataStax, the source for professional Cassandra support >> >> > http://www.datastax.com >> >> > >> >> >> >> >> >> >> >> -- >> >> Jonathan Ellis >> >> Project Chair, Apache Cassandra >> >> co-founder of DataStax, the source for professional Cassandra support >> >> http://www.datastax.com >> > >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
