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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: 1.0.3 cassandra java.lang.AssertionError
Date Tue, 13 Dec 2011 16:00:57 GMT
It means a garbage collection took 0 ms, which is unexpected.  It's harmless.

On Tue, Dec 13, 2011 at 1:16 AM, Michael Vaknine <michaelv@citypath.com> wrote:
> Hi,
> I am running a 4 cluster cassandra with replication factor 3.
> I have upgraded to 1.0.3 from 0.7.6
> After a week of work I get this errors.
> Does someone know what they mean?
>
> Thanks
> Michael
>
>
> STG-Cass1 INFO [COMMIT-LOG-WRITER] 2011-12-12 22:51:19,943 CommitLogSegment.java (line
60) Creating new commitlog segment /var/lib/cassandra/commitlog/CommitLog-1323730279943.log
> STG-Cass1 INFO [ScheduledTasks:1] 2011-12-12 22:51:40,961 GCInspector.java (line 123)
GC for ParNew: 256 ms for 1 collections, 8255093264 used; max is 12863930368
> STG-Cass2 INFO [ScheduledTasks:1] 2011-12-12 22:52:29,082 GCInspector.java (line 123)
GC for ParNew: 376 ms for 1 collections, 5685486648 used; max is 10716446720
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:29,997 MeteredFlusher.java (line 62)
flushing high-traffic column family CFS(Keyspace='City', ColumnFamily='Attractions') (estimated
1077151192 bytes)
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:29,997 ColumnFamilyStore.java (line
688) Enqueuing flush of Memtable-Attractions.Attractions_09partition_idx@914182009(1019770/3881818
serialized/live bytes, 30282 ops)
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:29,998 ColumnFamilyStore.java (line
688) Enqueuing flush of Memtable-Attractions@977851880(193229347/1073269374 serialized/live
bytes, 2552353 ops)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:29,998 Memtable.java (line 239) Writing
Memtable-Attractions.Attractions_09partition_idx@914182009(1019770/3881818 serialized/live
bytes, 30282 ops)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:30,060 Memtable.java (line 275) Completed
flushing /var/lib/cassandra/data/City/Attractions.Attractions_09partition_idx-hb-94-Data.db
(206749 bytes)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:30,061 Memtable.java (line 239) Writing
Memtable-Attractions@977851880(193229347/1073269374 serialized/live bytes, 2552353 ops)
> STG-Cass4 INFO [CompactionExecutor:25] 2011-12-12 22:52:30,061 CompactionTask.java (line
112) Compacting [SSTableReader(path='/var/lib/cassandra/data/City/Attractions.Attractions_09partition_idx-hb-93-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/City/Attractions.Attractions_09partition_idx-hb-92-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/City/Attractions.Attractions_09partition_idx-hb-94-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/City/Attractions.Attractions_09partition_idx-hb-90-Data.db')]
> STG-Cass4 INFO [ScheduledTasks:1] 2011-12-12 22:52:30,468 GCInspector.java (line 123)
GC for ParNew: 249 ms for 1 collections, 6580227336 used; max is 12863930368
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:31,002 MeteredFlusher.java (line 62)
flushing high-traffic column family CFS(Keyspace='User', ColumnFamily='Users') (estimated
874561935 bytes)
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:31,014 ColumnFamilyStore.java (line
688) Enqueuing flush of Memtable-Users.Users_09partition_idx@547620508(44385880/142668900
serialized/live bytes, 688387 ops)
> STG-Cass4 INFO [OptionalTasks:1] 2011-12-12 22:52:31,014 ColumnFamilyStore.java (line
688) Enqueuing flush of Memtable-Users@1890450561(79912773/731893035 serialized/live bytes,
1549850 ops)
> STG-Cass4 INFO [CompactionExecutor:25] 2011-12-12 22:52:31,248 CompactionTask.java (line
213) Compacted to .  3,342,843 to 2,631,394 (~78% of original) bytes for 1 keys at 2.114147MB/s.
 Time: 1,187ms.
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:34,646 Memtable.java (line 275) Completed
flushing /var/lib/cassandra/data/City/Attractions-hb-1301-Data.db (91834237 bytes)
> STG-Cass4 INFO [CompactionExecutor:25] 2011-12-12 22:52:34,647 CompactionTask.java (line
112) Compacting [SSTableReader(path='/var/lib/cassandra/data/City/Attractions-hb-1298-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/City/Attractions-hb-1299-Data.db'), SSTableReader(path='/var/lib/cassandra/data/City/Attractions-hb-1301-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/City/Attractions-hb-1300-Data.db')]
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:34,648 Memtable.java (line 239) Writing
Memtable-Users.Users_09partition_idx@547620508(44385880/142668900 serialized/live bytes, 688387
ops)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:35,036 Memtable.java (line 275) Completed
flushing /var/lib/cassandra/data/User/Users.Users_09partition_idx-hb-62-Data.db (4078473 bytes)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:35,036 Memtable.java (line 239) Writing
Memtable-Users@1890450561(79912773/731893035 serialized/live bytes, 1549850 ops)
> STG-Cass4 INFO [FlushWriter:10] 2011-12-12 22:52:38,616 Memtable.java (line 275) Completed
flushing /var/lib/cassandra/data/User/Users-hb-1335-Data.db (40788153 bytes)
> STG-Cass4 INFO [CompactionExecutor:25] 2011-12-12 22:53:20,669 CompactionTask.java (line
213) Compacted to .  483,546,752 to 240,371,887 (~49% of original) bytes for 23,806 keys
at 4.981020MB/s.  Time: 46,022ms.
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 AbstractCassandraDaemon.java
(line 133) Fatal exception in thread Thread
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 java.lang.AssertionError
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at org.apache.cassandra.service.GCInspector.logGCResults(GCInspector.java:103)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at org.apache.cassandra.service.GCInspector.access$000(GCInspector.java:41)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at org.apache.cassandra.service.GCInspector$1.run(GCInspector.java:85)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> STG-Cass4 ERROR [ScheduledTasks:1] 2011-12-12 22:55:26,554 at java.lang.Thread.run(Thread.java:619)
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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