[CASSANDRA-8067] NullPointerException in KeyCacheSerializer

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.1.5
• Severity: Normal
• Since Version: 2.1.0
• Assignee: Aleksey Yeschenko
• Reporter: Eric Leleu

Authors

Aleksey Yeschenko

Reviewers

Benedict Elliott Smith

• Created: 07/Oct/14 08:02
• Updated: 16/Apr/19 09:31
• Resolved: 03/Mar/15 22:11

Description

Hi,

I have this stack trace in the logs of Cassandra server (v2.1)

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]

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...

 474             CFMetaData cfm = Schema.instance.getCFMetaData(key.desc.ksname, key.desc.cfname);
 475             cfm.comparator.rowIndexEntrySerializer().serialize(entry, out);

Regards,
Eric

Issue Links

• duplicates: CASSANDRA-7784 DROP table leaves the counter and row cache in a temporarily inconsistent state that, if saved during, will cause an exception to be thrown
• is duplicated by: CASSANDRA-8605 nullpointer exception in thread pool executor
• is duplicated by: CASSANDRA-9122 CassandraDaemon.java:167 NullPointerException
• is duplicated by: CASSANDRA-9216 NullPointerException (NPE) during Compaction Cache Serialization