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https://issues.apache.org/jira/browse/CASSANDRA-8067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301040#comment-14301040
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Rafał Furmański commented on CASSANDRA-8067:
--------------------------------------------
It happened once again during repair session:
{noformat}
INFO [CompactionExecutor:243] 2015-02-02 06:30:00,845 CompactionTask.java:251
- Compacted 2 sstables to []. 319 bytes to 0 (~0% of original) in 1ms =
0.000000MB/s. 2 total partitions merged to 0. Partition merge counts were
{2:1, }
ERROR [CompactionExecutor:244] 2015-02-02 06:39:52,980 CassandraDaemon.java:153
- Exception in thread Thread[CompactionExecutor:244,1,main]
java.lang.NullPointerException: null
at
org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:475)
~[apache-cassandra-2.1.2.jar:2.1.2]
at
org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:463)
~[apache-cassandra-2.1.2.jar:2.1.2]
at
org.apache.cassandra.cache.AutoSavingCache$Writer.saveCache(AutoSavingCache.java:274)
~[apache-cassandra-2.1.2.jar:2.1.2]
at
org.apache.cassandra.db.compaction.CompactionManager$11.run(CompactionManager.java:1088)
~[apache-cassandra-2.1.2.jar:2.1.2]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
~[na:1.7.0_72]
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
~[na:1.7.0_72]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
~[na:1.7.0_72]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_72]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_72]
{noformat}
Please take a look especially at this weird log message before exception:
"Compacted 2 sstables to []".
> NullPointerException in KeyCacheSerializer
> ------------------------------------------
>
> Key: CASSANDRA-8067
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8067
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Eric Leleu
> Fix For: 2.1.1
>
>
> Hi,
> I have this stack trace in the logs of Cassandra server (v2.1)
> {code}
> ERROR [CompactionExecutor:14] 2014-10-06 23:32:02,098
> CassandraDaemon.java:166 - Exception in thread
> Thread[CompactionExecutor:14,1,main]
> java.lang.NullPointerException: null
> at
> org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:475)
> ~[apache-cassandra-2.1.0.jar:2.1.0]
> at
> org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:463)
> ~[apache-cassandra-2.1.0.jar:2.1.0]
> at
> org.apache.cassandra.cache.AutoSavingCache$Writer.saveCache(AutoSavingCache.java:225)
> ~[apache-cassandra-2.1.0.jar:2.1.0]
> at
> org.apache.cassandra.db.compaction.CompactionManager$11.run(CompactionManager.java:1061)
> ~[apache-cassandra-2.1.0.jar:2.1.0]
> at java.util.concurrent.Executors$RunnableAdapter.call(Unknown
> Source) ~[na:1.7.0]
> at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
> ~[na:1.7.0]
> at java.util.concurrent.FutureTask.run(Unknown Source) ~[na:1.7.0]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
> [na:1.7.0]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> [na:1.7.0]
> at java.lang.Thread.run(Unknown Source) [na:1.7.0]
> {code}
> It may not be critical because this error occured in the AutoSavingCache.
> However the line 475 is about the CFMetaData so it may hide bigger issue...
> {code}
> 474 CFMetaData cfm =
> Schema.instance.getCFMetaData(key.desc.ksname, key.desc.cfname);
> 475 cfm.comparator.rowIndexEntrySerializer().serialize(entry,
> out);
> {code}
> Regards,
> Eric
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