Vishy Kasar created CASSANDRA-7632:
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             Summary: NPE in AutoSavingCache$Writer.deleteOldCacheFiles
                 Key: CASSANDRA-7632
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7632
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Vishy Kasar
            Priority: Minor


Observed this NPE in one of our production cluster (2.0.9). Does not seem to be 
causing harm but good to resolve.

ERROR [CompactionExecutor:1188] 2014-07-27 21:57:08,225 CassandraDaemon.java 
(line 199) Exception in thread Thread[CompactionExecutor:1188,1,main] 
clusterName=clouddb_p03 
java.lang.NullPointerException 
at 
org.apache.cassandra.cache.AutoSavingCache$Writer.deleteOldCacheFiles(AutoSavingCache.java:265)
 
at 
org.apache.cassandra.cache.AutoSavingCache$Writer.saveCache(AutoSavingCache.java:195)
 
at 
org.apache.cassandra.db.compaction.CompactionManager$10.run(CompactionManager.java:862)
 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
at java.lang.Thread.run(Thread.java:722)



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