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Jason Kania commented on CASSANDRA-9216: ---------------------------------------- I have not encountered it since. Might I suggest that if it is due to a corrupt keycache file that a specific error be generated in this case? In my opinion NullPointers should never be passed beyond an API boundary as they communicate too little information. > NullPointerException (NPE) during Compaction Cache Serialization > ---------------------------------------------------------------- > > Key: CASSANDRA-9216 > URL: https://issues.apache.org/jira/browse/CASSANDRA-9216 > Project: Cassandra > Issue Type: Bug > Environment: Debian linux wheezy patch current > Reporter: Jason Kania > Labels: Compaction, NPE > Fix For: 2.1.x > > > In case this hasn't been reported (I looked but did not see it), a null > pointer exception is occurring during compaction. The stack track is as > follows: > {code} > ERROR [CompactionExecutor:50] 2015-04-20 13:42:43,827 > CassandraDaemon.java:223 - Exception in thread > Thread[CompactionExecutor:50,1,main] > java.lang.NullPointerException: null > at > org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:475) > ~[apache-cassandra-2.1.4.jar:2.1.4] > at > org.apache.cassandra.service.CacheService$KeyCacheSerializer.serialize(CacheService.java:463) > ~[apache-cassandra-2.1.4.jar:2.1.4] > at > org.apache.cassandra.cache.AutoSavingCache$Writer.saveCache(AutoSavingCache.java:274) > ~[apache-cassandra-2.1.4.jar:2.1.4] > at > org.apache.cassandra.db.compaction.CompactionManager$11.run(CompactionManager.java:1152) > ~[apache-cassandra-2.1.4.jar:2.1.4] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > ~[na:1.7.0_75] > at java.util.concurrent.FutureTask.run(FutureTask.java:262) > ~[na:1.7.0_75] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > ~[na:1.7.0_75] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > [na:1.7.0_75] > at java.lang.Thread.run(Thread.java:745) [na:1.7.0_75]{code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)