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From "Jose Martinez Poblete (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8295) Cassandra runs OOM @ java.util.concurrent.ConcurrentSkipListMap$HeadIndex
Date Tue, 11 Nov 2014 22:20:34 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jose Martinez Poblete updated CASSANDRA-8295:
---------------------------------------------
    Environment: 
DSE 4.5.3 Cassandra 2.0.11.82


  was:
Cassandra 2.0.11.82



> Cassandra runs OOM @ java.util.concurrent.ConcurrentSkipListMap$HeadIndex
> -------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8295
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8295
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: DSE 4.5.3 Cassandra 2.0.11.82
>            Reporter: Jose Martinez Poblete
>         Attachments: alln01-ats-cas3.cassandra.yaml, output.tgz, system.tgz, system.tgz.1,
system.tgz.2, system.tgz.3
>
>
> Customer runs a 3 node cluster 
> Their dataset is less than 1Tb and during data load, one of the nodes enter a GC death
spiral:
> {noformat}
>  INFO [ScheduledTasks:1] 2014-11-07 23:31:08,094 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
3348 ms for 2 collections, 1658268944 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:40:58,486 GCInspector.java (line 116) GC for ParNew:
442 ms for 2 collections, 6079570032 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:40:58,487 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
7351 ms for 2 collections, 6084678280 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:01,836 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
603 ms for 1 collections, 7132546096 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:09,626 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
761 ms for 1 collections, 7286946984 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:15,265 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
703 ms for 1 collections, 7251213520 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:25,027 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
1205 ms for 1 collections, 6507586104 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:41,374 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
13835 ms for 3 collections, 6514187192 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-07 23:41:54,137 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
6834 ms for 2 collections, 6521656200 used; max is 8375238656
> ...
>  INFO [ScheduledTasks:1] 2014-11-08 12:13:11,086 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
43967 ms for 2 collections, 8368777672 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-08 12:14:14,151 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
63968 ms for 3 collections, 8369623824 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-08 12:14:55,643 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
41307 ms for 2 collections, 8370115376 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-08 12:20:06,197 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
309634 ms for 15 collections, 8374994928 used; max is 8375238656
>  INFO [ScheduledTasks:1] 2014-11-08 13:07:33,617 GCInspector.java (line 116) GC for ConcurrentMarkSweep:
2681100 ms for 143 collections, 8347631560 used; max is 8375238656
> {noformat} 
> Their application waits 1 minute before a retry when a timeout is returned
> This is what we find on their heapdumps:
> {noformat}
> Class Name                                                                          
                                                                                         
                                                                                         
                                | Shallow Heap | Retained Heap | Percentage
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> org.apache.cassandra.db.Memtable @ 0x773f52f80                                      
                                                                                         
                                                                                         
                                |           72 | 8,086,073,504 |     96.66%
> |- java.util.concurrent.ConcurrentSkipListMap @ 0x724508fe8                         
                                                                                         
                                                                                         
                                |           48 | 8,086,073,320 |     96.66%
> |  |- java.util.concurrent.ConcurrentSkipListMap$HeadIndex @ 0x64f9219a0            
                                                                                         
                                                                                         
                                |           32 | 8,086,073,256 |     96.66%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x614b081a8              
                                                                                         
                                                                                         
                                |           24 |    16,230,976 |      0.19%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x7da171948              
                                                                                         
                                                                                         
                                |           24 |     4,922,288 |      0.06%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x7f4518a80              
                                                                                         
                                                                                         
                                |           24 |     4,405,496 |      0.05%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x611d69d10              
                                                                                         
                                                                                         
                                |           24 |     3,737,672 |      0.04%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x71cd2fae8              
                                                                                         
                                                                                         
                                |           24 |     2,921,048 |      0.03%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$HeadIndex @ 0x728faed50         
                                                                                         
                                                                                         
                                |           32 |     2,012,592 |      0.02%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x6387eb950              
                                                                                         
                                                                                         
                                |           24 |     1,641,696 |      0.02%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x727f474f0              
                                                                                         
                                                                                         
                                |           24 |     1,328,936 |      0.02%
> |  |  |- java.util.concurrent.ConcurrentSkipListMap$Node @ 0x70d7a02b0              
                                                                                         
                                                                                         
                                |           24 |     1,050,624 |      0.01%
> |  |  |- byte[1048576] @ 0x7d87873d8  .........8.........CS.l`...attributes...slot..............attributes...runtime......A..<x.........C.......attributes...procgid.87.....CS.`....attributes...bflush.00.....CV......attributes...username........uV....server.f1432541.........8...server......A..<...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x60ab7b920  .....7...p...attributes...tottime....../..%....area......0.......attributes...lineid.56.....7.i.....attributes...tottime.156258924.....0B)\....container.4...../.......server....,PTXCALsdihqprod1\sdihqprod1...../.......machine.fxcdom1.....7.i.....attributes...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x609fb54f8  .....E.......attributes...lineid.901137423.....E.......attributes...testr1.1413.....E.......attributes...testr2.M393B1K70QB0-YK02014-01-03
06:46:31.....E.......attributes...tenum1name.EFSTLOOP.....CV......attributes...numunits.1.....E.......attributes...pa...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x60a0b5508  .....E.z.....area......?.......attributes...labelnum.SYSFA.....0"U.....attributes...testr1name.D75165799...../..^....attributes...crc.Hexload_Bootloader.....E.TR....machine......0.......attributes...bflush....../..&....attributes...majline....../._.P...att...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7d8f5e2b8  ......B9.....machine.solfr5.......L.....attributes...runtime.146.............attributes...tottime.109.......t.h...attributes...bmap.0......B9.....uuttype.VIP2-40=.......L.....attributes...cpptimeid.2006-04-11
10:53:48.............attributes...partnum.73-91...|    1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7d905e2c8  .....E.|.x...attributes...runtime.310.....E.P.0...attributes...partnum.15-13637-02.....E./<....area.SYSFA.....E./<....passfail.S.....E.|.x...attributes...testr1.1413.....E.P.0...attributes...partnum2.15-13637-02.....E./<....container....T.....E./<....attri...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7d915e2d8  ...../..l........../..l....server.sdihqprod1\sdihqprod1...../..l....machine.fxcdom1...../..l....uuttype.73-12304-03...../..l....area.PASTE...../..l....passfail.P...../..l....container........../..l....attributes...majline.0...../..l....attributes...subslot...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7d925e2e8  .............attributes...tottime.42........KH...attributes...testtime.........3....uuttype.0.............attributes...runtime..............attributes...procgid.73-9341-021417817........3....area.PASTE.............attributes...test.PASSED........3....passf...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7be7473f0  .....=..Jh.........=...(...attributes...runtime.f6f1298f-830f-47f4-b1dd-1adb07b99ff9653.....=..*(...attributes...numunits.1.....=..Jh...server......=.._....attributes...testr3name.RCDN9HQPROD1\RCDN9HQPROD1CPPVersion:3.6.2803.0.....=..*(...attributes...test...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7be847800  .........0...passfail.P........ (...attributes...bflush.0.......w.....attributes...tottime.1161.....A.b.(...area.SYSVF.......kH....attributes...test..............attributes...runtime.PASSED.....A.zl....attributes...procgid.2.........0...container.............|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7be949070  .....=...0...attributes...pcid......=..>....attributes...cpptimeid.6cc40f78-9525-4488-909f-2247d9537cf82013-04-04
19:24:23.....=.Z.....attributes...runtime.0.....=...0...attributes...testr3name.CPPVersion:3.6.2803.0.....=.............=...0...attributes...p...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7bea4a8e0  .....>{A0....uuttype.FJZPROD1\FJZPROD1.....>z.Mp...attributes...pcid......Ct..(...attributes...lineid......=..n8...container......=.oE..........4B......machine.F2049802CBLSTB-4044066-K9fxhmcekit2.....=.p(h...attributes...proctime......>z..`...machine.........|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7beb4a8f0  .....A../....attributes...partnum2......B'......attributes...username....D.....B'.L....area.f1303257.....A...P...area.74-8071-01F118190965553.....A.......server.PCBDLSYSPM.......$.....attributes...runtime......>{r+....attributes...cpptimeid......B.B.
...co...|    1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7bec4a900  .....=..;x...attributes...username.tczpawe73-100074-01.....=..;x...attributes...slot.0.....=.......area.ASSY.....=..;x...attributes...lineid......=.......passfail.0P.....=.......container..........=..;x...attributes...numunits.1.....=.......attributes...pa...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x7bed55ff0  .....=oC/....machine......"..Q....uuttype......"...`...attributes...parentsernum.73-8479-02FCZ133171DPfxcestgfqa1....."`..x...attributes...test......=l.2p...attributes...tenum3.8242009070919300730FOC13283D6A....."..Q....area......"...(...attributes...bflus...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  |- byte[1048576] @ 0x61cf45088  .....CSaL....server.FXCPROD1\FXCPROD1.....CW......passfail.P.....CSr.....attributes...runtime.50.....CSaL....machine.foxchict217.....CW......container..........CSaL....uuttype......CW......attributes...username.73-13315-03xzhang.....CSr.....attributes...te...|
   1,048,592 |     1,048,592 |      0.01%
> |  |  '- Total: 25 of 166,289 entries; 166,264 more                                 
                                                                                         
                                                                                         
                                |              |               |           
> |  |- java.util.concurrent.ConcurrentSkipListMap$EntrySet @ 0x72541dc58             
                                                                                         
                                                                                         
                                |           16 |            16 |      0.00%
> |  '- Total: 2 entries                                                              
                                                                                         
                                                                                         
                                |              |               |           
> |- org.github.jamm.MemoryMeter @ 0x72541db50                                        
                                                                                         
                                                                                         
                                |           24 |            40 |      0.00%
> |- java.util.concurrent.atomic.AtomicLong @ 0x72541db68                             
                                                                                         
                                                                                         
                                |           24 |            24 |      0.00%
> |- java.util.concurrent.atomic.AtomicLong @ 0x72541db80                             
                                                                                         
                                                                                         
                                |           24 |            24 |      0.00%
> |- java.util.concurrent.atomic.AtomicLong @ 0x72541db38                             
                                                                                         
                                                                                         
                                |           24 |            24 |      0.00%
> '- Total: 5 entries                                                                 
                                                                                         
                                                                                         
                                |              |               |           
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> {noformat}
> They are using the defaults at cassandra.yaml which means sstables should not use that
much heap.  Setting the following have been of no use:
> {noformat}
> memtable_total_space_in_mb: 2000
> memtable_flush_queue_size: 1
> {noformat}



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