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https://issues.apache.org/jira/browse/CASSANDRA-8269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Shuler updated CASSANDRA-8269:
--------------------------------------
Comment: was deleted
(was: I believe CASSANDRA-6998 is the correct ticket number from the first
comment.)
> Large number of system hints & other CF's cause heap to fill and run OOM
> ------------------------------------------------------------------------
>
> Key: CASSANDRA-8269
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8269
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: DSE 4.5.0 with Apache Cassandra 2.0.5
> Reporter: Jose Martinez Poblete
> Attachments: alln01-ats-cas2-java_1414110068_Leak_Suspects.zip,
> system.log
>
>
> A 3 node cluster with large amount of sstables for system.hints and other 3
> user tables was coming down regularly with OOM on system log showing up the
> following:
> {noformat}
> ERROR [OptionalTasks:1] 2014-10-23 18:51:29,052 CassandraDaemon.java (line
> 199) Exception in thread Thread[OptionalTasks:1,5,main]
> java.lang.OutOfMemoryError: Java heap space
> at
> org.apache.cassandra.io.sstable.IndexHelper$IndexInfo.deserialize(IndexHelper.java:187)
> at
> org.apache.cassandra.db.RowIndexEntry$Serializer.deserialize(RowIndexEntry.java:122)
> at
> org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.computeNext(SSTableScanner.java:229)
> at
> org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.computeNext(SSTableScanner.java:203)
> at
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
> at
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
> at
> org.apache.cassandra.io.sstable.SSTableScanner.hasNext(SSTableScanner.java:183)
> at
> org.apache.cassandra.utils.MergeIterator$Candidate.advance(MergeIterator.java:144)
> at
> org.apache.cassandra.utils.MergeIterator$ManyToOne.<init>(MergeIterator.java:87)
> at org.apache.cassandra.utils.MergeIterator.get(MergeIterator.java:46)
> at
> org.apache.cassandra.db.RowIteratorFactory.getIterator(RowIteratorFactory.java:74)
> at
> org.apache.cassandra.db.ColumnFamilyStore.getSequentialIterator(ColumnFamilyStore.java:1586)
> at
> org.apache.cassandra.db.ColumnFamilyStore.getRangeSlice(ColumnFamilyStore.java:1709)
> at
> org.apache.cassandra.db.ColumnFamilyStore.getRangeSlice(ColumnFamilyStore.java:1643)
> at
> org.apache.cassandra.db.HintedHandOffManager.scheduleAllDeliveries(HintedHandOffManager.java:513)
> at
> org.apache.cassandra.db.HintedHandOffManager.access$000(HintedHandOffManager.java:91)
> at
> org.apache.cassandra.db.HintedHandOffManager$1.run(HintedHandOffManager.java:173)
> at
> org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor$UncomplainingRunnable.run(DebuggableScheduledThreadPoolExecutor.java:75)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> {noformat}
> A heapdump would show the following:
> {noformat}
> Class Name
> | Shallow Heap | Retained Heap | Percentage
> ----------------------------------------------------------------------------------------------------------------------------------
> java.lang.Thread @ 0x67b292138 OptionalTasks:1 Thread
> | 104 | 4,901,485,768 | 58.60%
> |- org.apache.cassandra.utils.MergeIterator$ManyToOne @ 0x7b9dc4ad8
> | 40 | 4,900,817,312 | 58.59%
> | |- java.util.ArrayList @ 0x6f05f15f0
> | 24 | 403,635,848 | 4.83%
> | |- org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator @
> 0x7b5fe7078| 40 | 29,669,312 | 0.35%
> | | |- org.apache.cassandra.db.RowIndexEntry$IndexedEntry @ 0x7b7caaa28
> | 32 | 26,770,264 | 0.32%
> | | |- org.apache.cassandra.db.RowIndexEntry$IndexedEntry @ 0x7b7f6e670
> | 32 | 2,898,864 | 0.03%
> | | | '- java.util.ArrayList @ 0x7b7caaae0
> | 24 | 2,898,832 | 0.03%
> | | | '- java.lang.Object[12283] @ 0x7b7caaaf8
> | 49,152 | 2,898,808 | 0.03%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6af8 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6be0 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6cc8 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6db0 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6e98 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb6f80 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7068 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7150 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7238 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7320 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7408 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb74f0 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb75d8 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb76c0 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb77a8 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7890 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7978 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7a60 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7b48 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7c30 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7d18 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7e00 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7ee8 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb7fd0 | 40 | 232 | 0.00%
> | | | |- org.apache.cassandra.io.sstable.IndexHelper$IndexInfo @
> 0x7b7cb80b8 | 40 | 232 | 0.00%
> | | | '- Total: 25 of 12,283 entries; 12,258 more
> | | |
> ----------------------------------------------------------------------------------------------------------------------------------
> {noformat}
> We suspected of large amount of system tables to be an issue:
> {noformat}
> alln01-ats-cas2:
> ============
> [root@alln01-ats-cas2 ~]# sstableReport | tee /tmp/sstableReport.txt
> Data directory: /cassandra/data
> Total sstable files: 45662
> Itemized:
> ks_r_only test_results_verify FileCount: 3
> mfgprod test_results FileCount: 292
> mfgprod test_results_logs FileCount: 4
> mfgprod test_results_new FileCount: 12
> mfgprod test_results_new2 FileCount: 6
> mfgprod test_results_new3 FileCount: 6
> mfgprod test_results_new4 FileCount: 9633
> mfgprod test_results_new5 FileCount: 9667
> mfgprod test_results_new6 FileCount: 8867
> mfgprod test_results_verify_threads FileCount: 1
> mfgprod test_results_verify_threads_new5 FileCount: 1
> mfgprod test_results_verify_threads_new6 FileCount: 24
> OpsCenter bestpractice_results FileCount: 1
> OpsCenter events FileCount: 6
> OpsCenter events_timeline FileCount: 2
> OpsCenter pdps FileCount: 7
> OpsCenter rollups300 FileCount: 10
> OpsCenter rollups60 FileCount: 29
> OpsCenter rollups7200 FileCount: 1
> OpsCenter rollups86400 FileCount: 1
> OpsCenter settings FileCount: 10
> pkm_test pkm1 FileCount: 1
> stressd Standard1 FileCount: 2
> stress Standard1 FileCount: 1
> system batchlog FileCount: 165
> system compaction_history FileCount: 2
> system compactions_in_progress FileCount: 5
> system hints FileCount: 16856
> system IndexInfo FileCount: 1
> system local FileCount: 2
> system peer_events FileCount: 3
> system peers FileCount: 4
> system schema_columnfamilies FileCount: 3
> system schema_columns FileCount: 3
> system schema_keyspaces FileCount: 3
> system sstable_activity FileCount: 28
> {noformat}
> System became stable after we rid of the system hints and compacted other 3
> user tables:
> {noformat}
> mfgprod test_results_new4 FileCount: 9633
> mfgprod test_results_new5 FileCount: 9667
> mfgprod test_results_new6 FileCount: 8867
> system hints FileCount: 16856
> {noformat}
> Heapdump is rather large to be attached
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