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https://issues.apache.org/jira/browse/CASSANDRA-11063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114280#comment-15114280
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Navjyot Nishant commented on CASSANDRA-11063:
---------------------------------------------
*Update:*
We did executed major compaction against this table which got completed
successfully and at this point there is no compaction running but This error is
continuously getting logged in system.log. We tried bouncing the node which did
not helped at all.
{code}
~ $ nodetool compactionstats
pending tasks: 0
{code}
> Unable to compute ceiling for max when histogram overflowed
> -----------------------------------------------------------
>
> Key: CASSANDRA-11063
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11063
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Environment: Cassandra 2.1.9 on RHEL
> Reporter: Navjyot Nishant
> Labels: Compaction, thread
>
> Issue https://issues.apache.org/jira/browse/CASSANDRA-8028 seems related with
> error we are getting. But we are getting this with Cassandra 2.1.9 when
> autocompaction is running it keeps throwing following errors, we are unsure
> if its a bug or can be resolved, please suggest.
> {code}
> WARN [CompactionExecutor:3] 2016-01-23 13:30:40,907 SSTableWriter.java:240 -
> Compacting large partition gccatlgsvcks/category_name_dedup:66611300
> (138152195 bytes)
> ERROR [CompactionExecutor:1] 2016-01-23 13:30:50,267 CassandraDaemon.java:223
> - Exception in thread Thread[CompactionExecutor:1,1,main]
> java.lang.IllegalStateException: Unable to compute ceiling for max when
> histogram overflowed
> at
> org.apache.cassandra.utils.EstimatedHistogram.mean(EstimatedHistogram.java:203)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.io.sstable.metadata.StatsMetadata.getEstimatedDroppableTombstoneRatio(StatsMetadata.java:98)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.io.sstable.SSTableReader.getEstimatedDroppableTombstoneRatio(SSTableReader.java:1987)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.db.compaction.AbstractCompactionStrategy.worthDroppingTombstones(AbstractCompactionStrategy.java:370)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy.getNextBackgroundSSTables(SizeTieredCompactionStrategy.java:96)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy.getNextBackgroundTask(SizeTieredCompactionStrategy.java:179)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.db.compaction.WrappingCompactionStrategy.getNextBackgroundTask(WrappingCompactionStrategy.java:84)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:230)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> ~[na:1.7.0_51]
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> ~[na:1.7.0_51]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> ~[na:1.7.0_51]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_51]
> at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51]
> {code}
> h3. Additional info:
> *cfstats is running fine for that table...*
> {code}
> ~ $ nodetool cfstats gccatlgsvcks.category_name_dedup
> Keyspace: gccatlgsvcks
> Read Count: 0
> Read Latency: NaN ms.
> Write Count: 0
> Write Latency: NaN ms.
> Pending Flushes: 0
> Table: category_name_dedup
> SSTable count: 6
> Space used (live): 836314727
> Space used (total): 836314727
> Space used by snapshots (total): 3621519
> Off heap memory used (total): 6930368
> SSTable Compression Ratio: 0.03725358753117693
> Number of keys (estimate): 3004
> Memtable cell count: 0
> Memtable data size: 0
> Memtable off heap memory used: 0
> Memtable switch count: 0
> Local read count: 0
> Local read latency: NaN ms
> Local write count: 0
> Local write latency: NaN ms
> Pending flushes: 0
> Bloom filter false positives: 0
> Bloom filter false ratio: 0.00000
> Bloom filter space used: 5240
> Bloom filter off heap memory used: 5192
> Index summary off heap memory used: 1200
> Compression metadata off heap memory used: 6923976
> Compacted partition minimum bytes: 125
> Compacted partition maximum bytes: 30753941057
> Compacted partition mean bytes: 8352388
> Average live cells per slice (last five minutes): 0.0
> Maximum live cells per slice (last five minutes): 0.0
> Average tombstones per slice (last five minutes): 0.0
> Maximum tombstones per slice (last five minutes): 0.0
> {code}
> *cfhistograms is also running fine...*
> {code}
> ~ $ nodetool cfhistograms gccatlgsvcks category_name_dedup
> gccatlgsvcks/category_name_dedup histograms
> Percentile SSTables Write Latency Read Latency Partition Size
> Cell Count
> (micros) (micros) (bytes)
> 50% 0.00 0.00 0.00 1109
> 20
> 75% 0.00 0.00 0.00 2299
> 42
> 95% 0.00 0.00 0.00 11864
> 215
> 98% 0.00 0.00 0.00 35425
> 642
> 99% 0.00 0.00 0.00 51012
> 924
> Min 0.00 0.00 0.00 125
> 4
> Max 0.00 0.00 0.00 30753941057
> 268650950
> {code}
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