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https://issues.apache.org/jira/browse/CASSANDRA-11821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Jirsa updated CASSANDRA-11821:
-----------------------------------
Labels: (was: proposed-wontfix)
> nodetool cfhistograms throws java.lang.ArrayIndexOutOfBoundsException and
> reset the cfhistograms
> ------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-11821
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11821
> Project: Cassandra
> Issue Type: Bug
> Components: Tools
> Environment: 2.0.17, rhel6.4
> Reporter: Benoit Perroud
> Priority: Minor
>
> I had nodes running for a decent amount of time (like 3 months).
> {code}
> nodetool cfhistograms keyspace table
> {code}
> did throw and {{ArrayIndexOutOfBoundsException}} in the read latency section:
> {code}
> Read Latency (microseconds)
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 90
> at org.apache.cassandra.tools.NodeCmd.printHistogram(NodeCmd.java:1086)
> at
> org.apache.cassandra.tools.NodeCmd.printCfHistograms(NodeCmd.java:1138)
> at org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:1472)
> {code}
> Surprisingly, the running the same cmd a second time did succeeded, but the
> histograms seem to be reset:
> first call:
> {code}
> SSTables per Read
> 1 sstables: 183026
> 2 sstables: 176538
> 3 sstables: 49159
> 4 sstables: 23034
> 5 sstables: 16380
> ...
> Write Latency (microseconds)
> 3 us: 4
> 4 us: 33
> 5 us: 237
> 6 us: 1193
> 7 us: 4055
> 8 us: 14357
> 10 us: 146728
> 12 us: 565588
> 14 us: 1907616
> 17 us: 8468503
> 20 us: 16218034
> ...
> {code}
> After:
> {code}
> SSTables per Read
> 2 sstables: 52
> 3 sstables: 4
> Write Latency (microseconds)
> 6 us: 1
> 7 us: 3
> 8 us: 5
> 10 us: 53
> 12 us: 133
> 14 us: 379
> 17 us: 1190
> 20 us: 1605
> {code}
> I didn't find anything on the logs, and I wasn't able to have the exception
> popping out more than once per servers.
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