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Posted to commits@cassandra.apache.org by "Vijay (Commented) (JIRA)" <ji...@apache.org> on 2012/03/29 20:58:22 UTC
[jira] [Commented] (CASSANDRA-4095) Internal error processing
get_slice (NullPointerException)
[ https://issues.apache.org/jira/browse/CASSANDRA-4095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241510#comment-13241510 ]
Vijay commented on CASSANDRA-4095:
----------------------------------
+1
> Internal error processing get_slice (NullPointerException)
> ----------------------------------------------------------
>
> Key: CASSANDRA-4095
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4095
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.2
> Environment: Java(TM) SE Runtime Environment (build 1.6.0_30-b12)
> Reporter: John Laban
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 1.0.9, 1.1.0
>
> Attachments: 4095.txt
>
>
> I get this pretty regularly. It seems to happen transiently on multiple nodes in my cluster, every so often, and goes away.
> ERROR [Thrift:45] 2012-03-26 19:59:12,024 Cassandra.java (line 3041) Internal error processing get_slice
> java.lang.NullPointerException
> at org.apache.cassandra.db.SliceFromReadCommand.maybeGenerateRetryCommand(SliceFromReadCommand.java:76)
> at org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:724)
> at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:564)
> at org.apache.cassandra.thrift.CassandraServer.readColumnFamily(CassandraServer.java:128)
> at org.apache.cassandra.thrift.CassandraServer.getSlice(CassandraServer.java:283)
> at org.apache.cassandra.thrift.CassandraServer.multigetSliceInternal(CassandraServer.java:365)
> at org.apache.cassandra.thrift.CassandraServer.get_slice(CassandraServer.java:326)
> at org.apache.cassandra.thrift.Cassandra$Processor$get_slice.process(Cassandra.java:3033)
> at org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2889)
> at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:187)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> The line in question is (I think) the one below, so it looks like the column family reference for a row can sometimes be null?
> int liveColumnsInRow = row != null ? row.cf.getLiveColumnCount() : 0;
> Here is my column family (on 1.0.8):
> ColumnFamily: WorkQueue (Super)
> Key Validation Class: org.apache.cassandra.db.marshal.UTF8Type
> Default column value validator: org.apache.cassandra.db.marshal.UTF8Type
> Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type/org.apache.cassandra.db.marshal.UTF8Type
> Row cache size / save period in seconds / keys to save : 0.0/0/all
> Row Cache Provider: org.apache.cassandra.cache.ConcurrentLinkedHashCacheProvider
> Key cache size / save period in seconds: 0.0/0
> GC grace seconds: 0
> Compaction min/max thresholds: 4/32
> Read repair chance: 0.0
> Replicate on write: false
> Bloom Filter FP chance: default
> Built indexes: []
> Compaction Strategy: org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy
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