TTLs : no
Deletion : yes ; but I think I can avoid this and thus running the same test 
without deletion, just to eliminate possibilities.

-----Original Message-----
From: Sylvain Lebresne [mailto:sylv...@datastax.com] 
Sent: woensdag 5 oktober 2011 15:34
To: user@cassandra.apache.org
Subject: Re: invalid column name length 0

Ok. Quick other question then. Did you issue deletion and/or used TTLs for that 
test ?

Also, it's probably worth creating a ticket on 
https://issues.apache.org/jira/browse/CASSANDRA
if you don't mind.

--
Sylvain

On Wed, Oct 5, 2011 at 2:42 PM, Desimpel, Ignace <ignace.desim...@nuance.com> 
wrote:
> Did the test again, empty database, with replication factor 3, Cassandra 
> running in it's own jvm.
> All data is now stored using a separate program that connects to the database 
> using THRIFT.
> At least this results in a lot less Dead/Up messages (I guess the GC had too 
> much work handling the non-cassandra memory objects), but it is still there.
>
> Also the exception 'invalid column name length 0' is there again. Below is a 
> log of machine x.x.x.59 starting after 00:00 hour. One hour before 00:00 I 
> stopped all storing, so that the machines had nothing else to do besides 
> compacting and cleaning up and ... (still compacting and discarding obsolete 
> commit logs).
>
> Checked the log files on all machines, and no exception nor assert related to 
> column names could be found.
>
> 2011-10-05 00:06:25.172 InetAddress /x.x.x.60 is now dead.
> 2011-10-05 00:06:25.179 InetAddress /x.x.x.60 is now UP
> 2011-10-05 00:46:47.091 Saved KsFullIdx-ForwardStringValues-KeyCache 
> (94 items) in 19 ms
> 2011-10-05 00:46:47.334 Saved KsFullIdx-ReverseLongValues-KeyCache 
> (98732 items) in 117 ms
> 2011-10-05 00:46:47.797 Saved KsFullIdx-ReverseLabelValues-KeyCache 
> (273425 items) in 259 ms
> 2011-10-05 00:46:48.645 Saved KsFullIdx-ReverseStringValues-KeyCache 
> (500000 items) in 472 ms
> 2011-10-05 01:00:52.691 ColumnFamilyStore(table='system', 
> columnFamily='HintsColumnFamily') liveRatio is 28.375375375375377 
> (just-counted was 28.375375375375377).  calculation took 4ms for 56 
> columns
> 2011-10-05 01:07:02.052 InetAddress /x.x.x.60 is now dead.
> 2011-10-05 01:07:02.058 InetAddress /x.x.x.60 is now UP
> 2011-10-05 01:07:02.060 InetAddress /x.x.x.61 is now dead.
> 2011-10-05 01:07:02.060 InetAddress /x.x.x.61 is now UP
> 2011-10-05 02:07:33.785 InetAddress /x.x.x.60 is now dead.
> 2011-10-05 02:07:33.791 InetAddress /x.x.x.60 is now UP
> 2011-10-05 02:41:12.528 Fatal exception in thread 
> Thread[HintedHandoff:1,5,main]
> java.io.IOError: 
> org.apache.cassandra.db.ColumnSerializer$CorruptColumnException: 
> invalid column name length 0
>        at 
> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSort
> edMap.java:265) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
> 281) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
> 236) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> java.util.concurrent.ConcurrentSkipListMap.buildFromSorted(ConcurrentS
> kipListMap.java:1493) ~[na:1.6.0_24]
>        at 
> java.util.concurrent.ConcurrentSkipListMap.<init>(ConcurrentSkipListMa
> p.java:1443) ~[na:1.6.0_24]
>        at 
> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
> java:445) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
> java:428) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
> java:418) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
> java:380) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.columniterator.IndexedSliceReader$IndexedBlock
> Fetcher.getNextBlock(IndexedSliceReader.java:179) 
> ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext(
> IndexedSliceReader.java:121) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext(
> IndexedSliceReader.java:49) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIt
> erator.java:140) ~[guava-r08.jar:na]
>        at 
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.ja
> va:135) ~[guava-r08.jar:na]
>        at 
> org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(SS
> TableSliceIterator.java:108) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.commons.collections.iterators.CollatingIterator.set(Collati
> ngIterator.java:283) ~[commons-collections-3.2.1.jar:3.2.1]
>        at 
> org.apache.commons.collections.iterators.CollatingIterator.least(Colla
> tingIterator.java:326) ~[commons-collections-3.2.1.jar:3.2.1]
>        at 
> org.apache.commons.collections.iterators.CollatingIterator.next(Collat
> ingIterator.java:230) ~[commons-collections-3.2.1.jar:3.2.1]
>        at 
> org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIterat
> or.java:69) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIt
> erator.java:140) ~[guava-r08.jar:na]
>        at 
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.ja
> va:135) ~[guava-r08.jar:na]
>        at 
> org.apache.cassandra.db.filter.SliceQueryFilter.collectReducedColumns(
> SliceQueryFilter.java:116) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.filter.QueryFilter.collectCollatedColumns(Quer
> yFilter.java:142) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFam
> ilyStore.java:1427) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamily
> Store.java:1304) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamily
> Store.java:1261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.HintedHandOffManager.sendRow(HintedHandOffMana
> ger.java:155) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(Hi
> ntedHandOffManager.java:350) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.HintedHandOffManager.access$100(HintedHandOffM
> anager.java:89) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.db.HintedHandOffManager$2.runMayThrow(HintedHandO
> ffManager.java:397) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30
> ) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecu
> tor.java:886) ~[na:1.6.0_24]
>        at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.
> java:908) ~[na:1.6.0_24]
>        at java.lang.Thread.run(Thread.java:662) ~[na:1.6.0_24] Caused 
> by: org.apache.cassandra.db.ColumnSerializer$CorruptColumnException: 
> invalid column name length 0
>        at 
> org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.
> java:89) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        at 
> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSort
> edMap.java:261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>        ... 33 common frames omitted
> 2011-10-05 02:42:04.961 Started hinted handoff for endpoint /x.x.x.60
> 2011-10-05 02:42:04.961 Finished hinted handoff of 0 rows to endpoint 
> /x.x.x.60
> 2011-10-05 02:42:18.381 Started hinted handoff for endpoint /x.x.x.61
> 2011-10-05 03:08:04.882 InetAddress /x.x.x.60 is now dead.
> 2011-10-05 03:08:04.890 InetAddress /x.x.x.61 is now dead.
>
> -----Original Message-----
> From: Desimpel, Ignace [mailto:ignace.desim...@nuance.com]
> Sent: dinsdag 4 oktober 2011 10:48
> To: user@cassandra.apache.org
> Subject: RE: invalid column name length 0
>
> I run the application with the JVM -ea option, so assertions are enabled.
>
> I insert records using the StorageProxy.mutate function. The elements are 
> created  as specified below.
> Below : The arForwardFuncValueBytes and arReverseFuncValueBytes are tested 
> for null or length = 0 by my code. The oTokenColumnName bytebuffer is created 
> each time, but is reused in the two QueryPaths. I assume this is allowed.
>
> QueryPath oPathtoInsert = new QueryPath( sForwardColumnFamToAdd, 
> ByteBuffer.wrap(arForwardFuncValueBytes), oTokenColumnName); 
> oForwardRowMut.add(oPathtoInsert, oTokenPos, lUpdateTimeStamp);
>
> oPathtoInsert = new QueryPath(sReverseColumnFamToAdd, 
> ByteBuffer.wrap(arReverseFuncValueBytes), oTokenColumnName); 
> oReverseRowMut.add(oPathtoInsert, oTokenPos, lUpdateTimeStamp);
>
> Anyway, I will do a test inserting the same data, but via thrift and with 
> Cassandra in a separate jvm.
>
> Ignace
>
> -----Original Message-----
> From: Sylvain Lebresne [mailto:sylv...@datastax.com]
> Sent: maandag 3 oktober 2011 18:02
> To: user@cassandra.apache.org
> Subject: Re: invalid column name length 0
>
> On the 'invalid column name length 0' exception, since you're embedding the 
> Cassandra server, it could be that you modify a column ByteBuffer that you 
> feed to Cassandra (that's fairly easy to do with ByteBuffer by calling some 
> relative get method of ByteBuffer). Or more generally that you feed a zero 
> length ByteBuffer as a column name (maybe by using a relative put without a 
> rewind/reset afterwards).
>
> Which leads me to a question: do you run your server without assertions 
> enabled ? (I suspect you do).
> If so I suggest you turn them on (to help you find the problem). It turns out 
> that we detect zero length column name at write time in an assertion, while 
> we detect them at read time using a good old 'if'. So if you do feed a zero 
> length column name to Cassandra throught the StorageService interface, you'd 
> only get the exception you get at read time.
>
> Now I don't know how much those exceptions are related to the 
> timeoutException you're seeing, but such error would typically produce 
> timeout on reads whatever the rpc_timeout value is.
>
> --
> Sylvain
>
> On Mon, Oct 3, 2011 at 4:58 PM, Desimpel, Ignace <ignace.desim...@nuance.com> 
> wrote:
>> I did an extra test, again starting from scratch but with replication factor 
>> 1.
>> I still get the dead/up messages and timeout exceptions, but the system 
>> keeps running and storing. However I ran out of disk space, logically 
>> producing a lot of other errors.
>> Then I restarted the Cassandra servers, so they were able to cleanup and 
>> restart without errors.
>> Then I did some queries I normally do and got again exceptions like " 
>> invalid column name length 0", but also other like " Corrupt (negative) 
>> value length encountered".
>> Exception : see below.
>>
>> With this test, I run Cassandra embedded, so a lot of processing ( and 
>> object allocations ) are done within the same JVM. I will modify the code so 
>> that 'my processing/allcations' are done outside and the Cassandra jvm only 
>> has to store the records. But that's for tomorrow.
>>
>> Did anyone ran into this type of error? And what was the reason? Any help?
>>
>> 2011-10-03 11:49:21.035 Fatal exception in thread 
>> Thread[ReadStage:623,5,main]
>> java.io.IOError: java.io.IOException: Corrupt (negative) value length 
>> encountered
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSor
>> t
>> edMap.java:265) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>> 281) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>> 236) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> java.util.concurrent.ConcurrentSkipListMap.buildFromSorted(Concurrent
>> S
>> kipListMap.java:1493) ~[na:1.6.0_24]
>>        at
>> java.util.concurrent.ConcurrentSkipListMap.<init>(ConcurrentSkipListM
>> a
>> p.java:1443) ~[na:1.6.0_24]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:445) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:428) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:418) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:380) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader$IndexedBloc
>> k
>> Fetcher.getNextBlock(IndexedSliceReader.java:179)
>> ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext
>> (
>> IndexedSliceReader.java:121) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext
>> (
>> IndexedSliceReader.java:49) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractI
>> t
>> erator.java:140) ~[guava-r08.jar:na]
>>        at
>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.j
>> a
>> va:135) ~[guava-r08.jar:na]
>>        at
>> org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(S
>> S
>> TableSliceIterator.java:108) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.commons.collections.iterators.CollatingIterator.set(Collat
>> i
>> ngIterator.java:283) ~[commons-collections-3.2.1.jar:3.2.1]
>>        at
>> org.apache.commons.collections.iterators.CollatingIterator.least(Coll
>> a
>> tingIterator.java:326) ~[commons-collections-3.2.1.jar:3.2.1]
>>        at
>> org.apache.commons.collections.iterators.CollatingIterator.next(Colla
>> t
>> ingIterator.java:230) ~[commons-collections-3.2.1.jar:3.2.1]
>>        at
>> org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingItera
>> t
>> or.java:69) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractI
>> t
>> erator.java:140) ~[guava-r08.jar:na]
>>        at
>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.j
>> a
>> va:135) ~[guava-r08.jar:na]
>>        at
>> org.apache.cassandra.db.filter.SliceQueryFilter.collectReducedColumns
>> (
>> SliceQueryFilter.java:116) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.filter.QueryFilter.collectCollatedColumns(Que
>> r
>> yFilter.java:142) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFa
>> m
>> ilyStore.java:1427) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamil
>> y
>> Store.java:1304) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamil
>> y
>> Store.java:1261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at org.apache.cassandra.db.Table.getRow(Table.java:385)
>> ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadComm
>> a
>> nd.java:61) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:6
>> 9
>> ) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.
>> j
>> ava:59) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
>> u
>> tor.java:886) ~[na:1.6.0_24]
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.
>> java:908) ~[na:1.6.0_24]
>>        at java.lang.Thread.run(Thread.java:662) ~[na:1.6.0_24] Caused
>> by: java.io.IOException: Corrupt (negative) value length encountered
>>        at
>> org.apache.cassandra.utils.ByteBufferUtil.readWithLength(ByteBufferUt
>> i
>> l.java:348) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.
>> java:108) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSor
>> t
>> edMap.java:261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        ... 32 common frames omitted
>> 2011-10-03 11:55:01.745 Fatal exception in thread 
>> Thread[ReadStage:624,5,main]
>> java.io.IOError:
>> org.apache.cassandra.db.ColumnSerializer$CorruptColumnException:
>> invalid column name length 0
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSor
>> t
>> edMap.java:265) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>> 281) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>> 236) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> java.util.concurrent.ConcurrentSkipListMap.buildFromSorted(Concurrent
>> S
>> kipListMap.java:1493) ~[na:1.6.0_24]
>>        at
>> java.util.concurrent.ConcurrentSkipListMap.<init>(ConcurrentSkipListM
>> a
>> p.java:1443) ~[na:1.6.0_24]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:445) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:428) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:418) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>> java:380) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader$IndexedBloc
>> k
>> Fetcher.getNextBlock(IndexedSliceReader.java:179)
>> ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext
>> (
>> IndexedSliceReader.java:121) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNext
>> (
>> IndexedSliceReader.java:49) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractI
>> t
>> erator.java:140) ~[guava-r08.jar:na]
>>        at
>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.j
>> a
>> va:135) ~[guava-r08.jar:na]
>>        at
>> org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(S
>> S
>> TableSliceIterator.java:108) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.commons.collections.iterators.CollatingIterator.anyHasNext
>> (
>> CollatingIterator.java:364) ~[commons-collections-3.2.1.jar:3.2.1]
>>        at
>> org.apache.commons.collections.iterators.CollatingIterator.hasNext(Co
>> l
>> latingIterator.java:217) ~[commons-collections-3.2.1.jar:3.2.1]
>>        at
>> org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingItera
>> t
>> or.java:55) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractI
>> t
>> erator.java:140) ~[guava-r08.jar:na]
>>        at
>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.j
>> a
>> va:135) ~[guava-r08.jar:na]
>>        at
>> org.apache.cassandra.db.filter.SliceQueryFilter.collectReducedColumns
>> (
>> SliceQueryFilter.java:116) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.filter.QueryFilter.collectCollatedColumns(Que
>> r
>> yFilter.java:142) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFa
>> m
>> ilyStore.java:1427) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamil
>> y
>> Store.java:1304) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamil
>> y
>> Store.java:1261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at org.apache.cassandra.db.Table.getRow(Table.java:385)
>> ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadComm
>> a
>> nd.java:61) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:6
>> 9
>> ) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.
>> j
>> ava:59) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
>> u
>> tor.java:886) ~[na:1.6.0_24]
>>        at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.
>> java:908) ~[na:1.6.0_24]
>>        at java.lang.Thread.run(Thread.java:662) ~[na:1.6.0_24] Caused
>> by: org.apache.cassandra.db.ColumnSerializer$CorruptColumnException:
>> invalid column name length 0
>>        at
>> org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.
>> java:89) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        at
>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSor
>> t
>> edMap.java:261) ~[apache-cassandra-0.8.6.jar:0.8.6]
>>        ... 31 common frames omitted
>> 2011-10-03 14:18:53.436 Saved CodeStructure-Computers-KeyCache (1
>> items) in 16 ms
>> 2011-10-03 14:19:24.804 Saved KsFullIdx-ReverseLabelValues-KeyCache
>> (123981 items) in 192 ms
>>
>> -----Original Message-----
>> From: Desimpel, Ignace [mailto:ignace.desim...@nuance.com]
>> Sent: dinsdag 27 september 2011 17:51
>> To: user@cassandra.apache.org
>> Subject: RE: invalid column name length 0
>>
>> No, brand new, started from scratch, no data at all.
>> My setup get into trouble after a couple of hours since it then starts 
>> giving the Dead/up messages.
>> I also get messages like '11 MUTATION messages dropped in server lifetime'
>> Later on I got this type of exception also.
>>
>> -----Original Message-----
>> From: Jonathan Ellis [mailto:jbel...@gmail.com]
>> Sent: dinsdag 27 september 2011 17:41
>> To: user@cassandra.apache.org
>> Subject: Re: invalid column name length 0
>>
>> Is this upgraded from an earlier version?
>>
>> On Tue, Sep 27, 2011 at 8:51 AM, Desimpel, Ignace 
>> <ignace.desim...@nuance.com> wrote:
>>> Version 0.8.6.
>>>
>>> After an extreme load to 4 (embedded) cassandra servers with 
>>> replication factor 3 ( Ubuntu 10.4, dual six core, 64 bit, no swap, 
>>> 1
>>> 15000 rpm commitlog disk, 1 15000 rpm datafile disk, ) I get a fatal 
>>> exception as listed below.
>>>
>>> No more messages were found after that.
>>>
>>>
>>>
>>> Probably other things are going wrong like the message "410 Could 
>>> not complete hinted handoff to /xxx.yyy.zzz.60", or the Dead/Up 
>>> messages (occurring long before this exception).
>>>
>>> But maybe this exception can point me in the right direction or even 
>>> point out some bug in Cassandra.
>>>
>>>
>>>
>>> Thanks,
>>>
>>> Ignace
>>>
>>>
>>>
>>>
>>>
>>> 2011-09-27 06:59:46,383 Compacting large row
>>> KsFullIdx/ForwardStringValues:3237343034 (178032211 bytes) 
>>> incrementally
>>>
>>> 2011-09-27 07:00:09,738 GC for ParNew: 311 ms for 1 collections,
>>> 8139389704 used; max is 33344716800
>>>
>>> 2011-09-27 07:00:12,818 Compacting large row
>>> KsFullIdx/ForwardStringValues:31363437 (1281862723 bytes) 
>>> incrementally
>>>
>>> 2011-09-27 07:02:16,025 Compacting large row
>>> KsFullIdx/ForwardStringValues:31363438 (1623095072 bytes) 
>>> incrementally
>>>
>>> 2011-09-27 07:04:38,332 GC for ParNew: 534 ms for 1 collections,
>>> 7811259472 used; max is 33344716800
>>>
>>> 2011-09-27 07:04:52,803 Compacting large row
>>> KsFullIdx/ForwardStringValues:3238313433 (1435774436 bytes) 
>>> incrementally
>>>
>>> 2011-09-27 07:06:57,160 Compacted to 
>>> /media/datadrive1/capd.cassandra.capd/dbdatafile/KsFullIdx/ForwardStringValues-tmp-g-542-Data.db.
>>> 43,244,902,670 to 42,780,624,408 (~98% of original) bytes for 1,260 keys.
>>> Time: 4,321,960ms.
>>>
>>> 2011-09-27 08:01:42,090 Saved KsFullIdx-ForwardStringValues-KeyCache
>>> (572
>>> items) in 16 ms
>>>
>>> 2011-09-27 08:01:42,182 Saved KsFullIdx-ReverseStringValues-KeyCache
>>> (25688
>>> items) in 63 ms
>>>
>>> 2011-09-27 08:18:13,078 InetAddress /xxx.yyy.zzz.62 is now dead.
>>>
>>> 2011-09-27 08:18:16,467 InetAddress /xxx.yyy.zzz.62 is now UP
>>>
>>> 2011-09-27 08:48:56,410 Could not complete hinted handoff to
>>> /xxx.yyy.zzz.60
>>>
>>> 2011-09-27 08:48:56,410 Enqueuing flush of
>>> Memtable-HintsColumnFamily@2083796703(12097/196566 serialized/live 
>>> bytes,
>>> 254 ops)
>>>
>>> 2011-09-27 08:48:56,411 Writing
>>> Memtable-HintsColumnFamily@2083796703(12097/196566 serialized/live 
>>> bytes,
>>> 254 ops)
>>>
>>> 2011-09-27 08:48:56,411 Nothing to compact in HintsColumnFamily; use 
>>> forceUserDefinedCompaction if you wish to force compaction of single 
>>> sstables (e.g. for tombstone collection)
>>>
>>> 2011-09-27 08:48:56,411 Finished hinted handoff of 254 rows to 
>>> endpoint
>>> /xxx.yyy.zzz.60
>>>
>>> 2011-09-27 08:48:56,490 Completed flushing 
>>> /media/datadrive1/capd.cassandra.capd/dbdatafile/system/HintsColumnF
>>> a
>>> m
>>> ily-g-10-Data.db
>>> (25079 bytes)
>>>
>>> 2011-09-27 08:49:42,858 Started hinted handoff for endpoint
>>> /xxx.yyy.zzz.62
>>>
>>> 2011-09-27 12:01:42,100 Saved KsFullIdx-ForwardStringValues-KeyCache
>>> (712
>>> items) in 27 ms
>>>
>>> 2011-09-27 12:01:42,182 Saved KsFullIdx-ReverseStringValues-KeyCache
>>> (30742
>>> items) in 55 ms
>>>
>>> 2011-09-27 12:10:01,016 InetAddress /xxx.yyy.zzz.59 is now dead.
>>>
>>> 2011-09-27 12:10:02,272 InetAddress /xxx.yyy.zzz.59 is now UP
>>>
>>> 2011-09-27 12:17:34,596 Fatal exception in thread 
>>> Thread[HintedHandoff:1,5,RMI Runtime]
>>>
>>> java.io.IOError:
>>> org.apache.cassandra.db.ColumnSerializer$CorruptColumnException:
>>> invalid column name length 0
>>>
>>>                 at
>>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSo
>>> r
>>> t
>>> edMap.java:265)
>>>
>>>                 at
>>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>>> 281)
>>>
>>>                 at
>>> org.apache.cassandra.io.util.ColumnIterator.next(ColumnSortedMap.java:
>>> 236)
>>>
>>>                 at
>>> java.util.concurrent.ConcurrentSkipListMap.buildFromSorted(Concurren
>>> t
>>> S
>>> kipListMap.java:1493)
>>>
>>>                 at
>>> java.util.concurrent.ConcurrentSkipListMap.<init>(ConcurrentSkipList
>>> M
>>> a
>>> p.java:1443)
>>>
>>>                 at
>>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>>> java:445)
>>>
>>>                 at
>>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>>> java:428)
>>>
>>>                 at
>>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>>> java:418)
>>>
>>>                 at
>>> org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.
>>> java:380)
>>>
>>>                 at
>>> org.apache.cassandra.db.columniterator.IndexedSliceReader$IndexedBlo
>>> c
>>> k
>>> Fetcher.getNextBlock(IndexedSliceReader.java:179)
>>>
>>>                 at
>>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNex
>>> t
>>> (
>>> IndexedSliceReader.java:121)
>>>
>>>                 at
>>> org.apache.cassandra.db.columniterator.IndexedSliceReader.computeNex
>>> t
>>> (
>>> IndexedSliceReader.java:49)
>>>
>>>                 at
>>> com.google.common.collect.AbstractIterator.tryToComputeNext(Abstract
>>> I
>>> t
>>> erator.java:140)
>>>
>>>                 at
>>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.
>>> j
>>> a
>>> va:135)
>>>
>>>                 at
>>> org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(
>>> S
>>> S
>>> TableSliceIterator.java:108)
>>>
>>>                 at
>>> org.apache.commons.collections.iterators.CollatingIterator.set(Colla
>>> t
>>> i
>>> ngIterator.java:283)
>>>
>>>                 at
>>> org.apache.commons.collections.iterators.CollatingIterator.least(Col
>>> l
>>> a
>>> tingIterator.java:326)
>>>
>>>                 at
>>> org.apache.commons.collections.iterators.CollatingIterator.next(Coll
>>> a
>>> t
>>> ingIterator.java:230)
>>>
>>>                 at
>>> org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIter
>>> a
>>> t
>>> or.java:69)
>>>
>>>                 at
>>> com.google.common.collect.AbstractIterator.tryToComputeNext(Abstract
>>> I
>>> t
>>> erator.java:140)
>>>
>>>                 at
>>> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.
>>> j
>>> a
>>> va:135)
>>>
>>>                 at
>>> org.apache.cassandra.db.filter.SliceQueryFilter.collectReducedColumn
>>> s
>>> (
>>> SliceQueryFilter.java:116)
>>>
>>>                 at
>>> org.apache.cassandra.db.filter.QueryFilter.collectCollatedColumns(Qu
>>> e
>>> r
>>> yFilter.java:142)
>>>
>>>                 at
>>> org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnF
>>> a
>>> m
>>> ilyStore.java:1427)
>>>
>>>                 at
>>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFami
>>> l
>>> y
>>> Store.java:1304)
>>>
>>>                 at
>>> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFami
>>> l
>>> y
>>> Store.java:1261)
>>>
>>>                 at
>>> org.apache.cassandra.db.HintedHandOffManager.sendRow(HintedHandOffMa
>>> n
>>> a
>>> ger.java:155)
>>>
>>>                 at
>>> org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(
>>> H
>>> i
>>> ntedHandOffManager.java:350)
>>>
>>>                 at
>>> org.apache.cassandra.db.HintedHandOffManager.access$100(HintedHandOf
>>> f
>>> M
>>> anager.java:89)
>>>
>>>                 at
>>> org.apache.cassandra.db.HintedHandOffManager$2.runMayThrow(HintedHan
>>> d
>>> O
>>> ffManager.java:397)
>>>
>>>                 at
>>> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:
>>> 3
>>> 0
>>> )
>>>
>>>                 at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExe
>>> c
>>> u
>>> tor.java:886)
>>>
>>>                 at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.
>>> java:908)
>>>
>>>                 at java.lang.Thread.run(Thread.java:662)
>>>
>>> Caused by: org.apache.cassandra.db.ColumnSerializer$CorruptColumnException:
>>> invalid column name length 0
>>>
>>>                 at
>>> org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.
>>> java:89)
>>>
>>>                 at
>>> org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSo
>>> r
>>> t
>>> edMap.java:261)
>>>
>>>                 ... 33 more
>>>
>>> 2011-09-27 12:17:53,291 Started hinted handoff for endpoint
>>> /xxx.yyy.zzz.59
>>
>>
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of DataStax, the source for professional Cassandra support 
>> http://www.datastax.com
>>
>

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