[jira] [Created] (CASSANDRA-7278) NPE in StorageProxy.java:1920

["Duncan Sands (JIRA)" <ji...@apache.org>]

Duncan Sands created CASSANDRA-7278:
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             Summary: NPE in StorageProxy.java:1920
                 Key: CASSANDRA-7278
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7278
             Project: Cassandra
          Issue Type: Bug
          Components: Core
         Environment: Cassandra 2.07, x86-64 ubuntu 12.04
            Reporter: Duncan Sands
            Priority: Minor
         Attachments: sl

Got this this morning under heavy load:

ERROR [ReadStage:128] 2014-05-21 07:59:03,274 CassandraDaemon.java (line 198) Exception in thread Thread[ReadStage:128,5,main]
java.lang.RuntimeException: java.lang.NullPointerException
        at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1920)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
        at org.apache.cassandra.io.util.RandomAccessReader.getTotalBufferSize(RandomAccessReader.java:157)
        at org.apache.cassandra.io.compress.CompressedRandomAccessReader.getTotalBufferSize(CompressedRandomAccessReader.java:159)
        at org.apache.cassandra.service.FileCacheService.get(FileCacheService.java:96)
        at org.apache.cassandra.io.util.PoolingSegmentedFile.getSegment(PoolingSegmentedFile.java:36)
        at org.apache.cassandra.io.sstable.SSTableReader.getFileDataInput(SSTableReader.java:1195)
        at org.apache.cassandra.db.columniterator.SimpleSliceReader.<init>(SimpleSliceReader.java:57)
        at org.apache.cassandra.db.columniterator.SSTableSliceIterator.createReader(SSTableSliceIterator.java:65)
        at org.apache.cassandra.db.columniterator.SSTableSliceIterator.<init>(SSTableSliceIterator.java:42)
        at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:167)
        at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:62)
        at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:250)
        at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:53)
        at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1540)
        at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1369)
        at org.apache.cassandra.db.Keyspace.getRow(Keyspace.java:327)
        at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:65)
        at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1352)
        at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1916)
        ... 3 more


There had just been a 20 second GC pause, and the system was dropping messages like mad, see attached log snippet.



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