Jose Martinez Poblete created CASSANDRA-8295:
------------------------------------------------
Summary: 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 w/Cassandra 2.0.11.82
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INFO 10:36:21,991 Logging initialized
INFO 10:36:22,016 DSE version: 4.5.3
INFO 10:36:22,016 Hadoop version: 1.0.4.13
INFO 10:36:22,017 Hive version: 0.12.0.5
INFO 10:36:22,017 Pig version: 0.10.1
INFO 10:36:22,018 Solr version: 4.6.0.2.8
INFO 10:36:22,019 Sqoop version: 1.4.4.14.2
INFO 10:36:22,019 Mahout version: 0.8
INFO 10:36:22,020 Appender version: 3.0.2
INFO 10:36:22,020 Spark version: 0.9.1
INFO 10:36:22,021 Shark version: 0.9.1.4
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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:
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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
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Their application waits 1 minute before a retry when a timeout is returned
This is what we find on their heapdumps:
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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:
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memtable_total_space_in_mb: 2000
memtable_flush_queue_size: 1
{noformat}
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