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https://issues.apache.org/jira/browse/HBASE-17069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860007#comment-15860007
]
Andrew Purtell commented on HBASE-17069:
----------------------------------------
Thanks for digging in here [~abhishek.chouhan]. I wasn't making much progress
starting from the row locking change and looking outward. Let me assign this
issue to you since you have us back on the right track.
bq. However i do think that the first meta edit is getting a bit screwed up.
Correct, the crux of the issue is we write different pieces of a meta row at
different times and have a timing issue where the required serialized
HRegionInfo is not written yet or has failed to be written yet other metadata
has made it over, like servercode and server location. The result is a corrupt
meta table entry that clients cannot handle. They get stuck on ""HRegionInfo
was null" and never recover, even after hours, even after other chaos actions
on the test rig. This implies the code that writes the serialized HRegionInfo
fails to successfully execute once and we never try it again.
{quote}
- We successfully open the region a target RS. At the time of opening in
HRegionServer.postOpenDeployTasks(..) we do
MetaTableAccessor.updateRegionLocation(..). This put has other entries like
servername, startcode etc but doesn't have hregioninfo. This request now goes
through since meta is now up again on another RS. We end up with partial info
in hbase:meta and the region is online on a RS. The clients however can't
access the data belonging to this region and we get "java.io.IOException:
HRegionInfo was null".
{quote}
I think it would be fine as a stop-gap to also include the serialized
HRegionInfo into this put along with the servername and start code.
This is treating the symptom so I would not like us to stop there, but I do
think it is good defensive programming to always include in a meta row update
all the information a client is going to require, or at least HRegionInfo, the
absence of which renders a portion of the keyspace unaddressable until manual
intervention.
> RegionServer writes invalid META entries for split daughters in some
> circumstances
> ----------------------------------------------------------------------------------
>
> Key: HBASE-17069
> URL: https://issues.apache.org/jira/browse/HBASE-17069
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.2.4
> Reporter: Andrew Purtell
> Priority: Critical
> Attachments: daughter_1_d55ef81c2f8299abbddfce0445067830.log,
> daughter_2_08629d59564726da2497f70451aafcdb.log, logs.tar.gz,
> parent-393d2bfd8b1c52ce08540306659624f2.log
>
>
> I have been seeing frequent ITBLL failures testing various versions of 1.2.x.
> Over the lifetime of 1.2.x the following issues have been fixed:
> - HBASE-15315 (Remove always set super user call as high priority)
> - HBASE-16093 (Fix splits failed before creating daughter regions leave meta
> inconsistent)
> And this one is pending:
> - HBASE-17044 (Fix merge failed before creating merged region leaves meta
> inconsistent)
> I can apply all of the above to branch-1.2 and still see this failure:
> *The life of stillborn region d55ef81c2f8299abbddfce0445067830*
> *Master sees SPLITTING_NEW*
> {noformat}
> 2016-11-08 04:23:21,186 INFO [AM.ZK.Worker-pool2-t82] master.RegionStates:
> Transition null to {d55ef81c2f8299abbddfce0445067830 state=SPLITTING_NEW,
> ts=1478579001186, server=node-3.cluster,16020,1478578389506}
> {noformat}
> *The RegionServer creates it*
> {noformat}
> 2016-11-08 04:23:26,035 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for GomnU: blockCache=LruBlockCache{blockCount=34,
> currentSize=14996112, freeSize=12823716208, maxSize=12838712320,
> heapSize=14996112, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> 2016-11-08 04:23:26,038 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for big: blockCache=LruBlockCache{blockCount=34,
> currentSize=14996112, freeSize=12823716208, maxSize=12838712320,
> heapSize=14996112, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> 2016-11-08 04:23:26,442 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for meta: blockCache=LruBlockCache{blockCount=63,
> currentSize=17187656, freeSize=12821524664, maxSize=12838712320,
> heapSize=17187656, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> 2016-11-08 04:23:26,713 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for nwmrW: blockCache=LruBlockCache{blockCount=96,
> currentSize=19178440, freeSize=12819533880, maxSize=12838712320,
> heapSize=19178440, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> 2016-11-08 04:23:26,715 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for piwbr: blockCache=LruBlockCache{blockCount=96,
> currentSize=19178440, freeSize=12819533880, maxSize=12838712320,
> heapSize=19178440, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> 2016-11-08 04:23:26,717 INFO
> [StoreOpener-d55ef81c2f8299abbddfce0445067830-1] hfile.CacheConfig: Created
> cacheConfig for tiny: blockCache=LruBlockCache{blockCount=96,
> currentSize=19178440, freeSize=12819533880, maxSize=12838712320,
> heapSize=19178440, minSize=12196776960, minFactor=0.95, multiSize=6098388480,
> multiFactor=0.5, singleSize=3049194240, singleFactor=0.25},
> cacheDataOnRead=true, cacheDataOnWrite=false, cacheIndexesOnWrite=false,
> cacheBloomsOnWrite=false, cacheEvictOnClose=false, cacheDataCompressed=false,
> prefetchOnOpen=false
> {noformat}
> *The RegionServer onlines it*
> {noformat}
> 2016-11-08 04:23:27,015 INFO
> [node-3.cluster,16020,1478578389506-daughterOpener=d55ef81c2f8299abbddfce0445067830]
> regionserver.HRegion: Onlined d55ef81c2f8299abbddfce0445067830; next
> sequenceid=19184
> 2016-11-08 04:23:27,029 INFO
> [regionserver/node-3.cluster/192.168.124.4:16020-splits-1478579001099]
> regionserver.HRegionServer: Post open deploy tasks for
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830.
> 2016-11-08 04:23:27,047 INFO
> [regionserver/node-3.cluster/192.168.124.4:16020-splits-1478579001099]
> hbase.MetaTableAccessor: Updated row
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830.
> with server=node-3.cluster,16020,1478578389506
> {noformat}
> *The Master transitions state from SPLITTING_NEW to OPEN*
> {noformat}
> 2016-11-08 04:23:27,058 INFO [AM.ZK.Worker-pool2-t84] master.RegionStates:
> Transition {d55ef81c2f8299abbddfce0445067830 state=SPLITTING_NEW,
> ts=1478579007057, server=node-3.cluster,16020,1478578389506} to
> {d55ef81c2f8299abbddfce0445067830 state=OPEN, ts=1478579007058,
> server=node-3.cluster,16020,1478578389506}
> 2016-11-08 04:23:27,059 INFO [AM.ZK.Worker-pool2-t84]
> master.AssignmentManager: Handled SPLIT event;
> parent=IntegrationTestBigLinkedList,,1478577020916.393d2bfd8b1c52ce08540306659624f2.,
> daughter
> a=IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830.,
> daughter
> b=IntegrationTestBigLinkedList,/\xFB\x14,1478579001155.08629d59564726da2497f70451aafcdb.,
> on node-3.cluster,16020,1478578389506
> {noformat}
> *RegionServer updates META - BUT APPARENTLY NOT CORRECTLY*
> {noformat}
> 2016-11-08 04:23:27,165 INFO
> [regionserver/node-3.cluster/192.168.124.4:16020-splits-1478579001099]
> regionserver.SplitRequest: Region split, hbase:meta updated, and report to
> master.
> Parent=IntegrationTestBigLinkedList,,1478577020916.393d2bfd8b1c52ce08540306659624f2.,
> new regions:
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830.,
>
> IntegrationTestBigLinkedList,/\xFB\x14,1478579001155.08629d59564726da2497f70451aafcdb..
> Split took 6sec
> {noformat}
> *RegionServer delays flush*
> (Is this important?)
> {noformat}
> 2016-11-08 04:24:14,639 WARN [MemStoreFlusher.0]
> regionserver.MemStoreFlusher: Region
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830.
> has too many store files; delaying flush up to 90000ms
> {noformat}
> *Immediate warnings about No serialized HRegionInfo*
> {noformat}
> 2016-11-08 04:24:44,691 WARN
> [B.defaultRpcServer.handler=26,queue=2,port=16000] hbase.MetaTableAccessor:
> No serialized HRegionInfo in
> keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478579007029/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478579007029/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478579007029/Put/vlen=8/seqid=0}
> {noformat}
> *Master is not happy either*
> {noformat}
> 2016-11-08 04:24:51,148 WARN [MASTER_TABLE_OPERATIONS-node-1:16000-0]
> hbase.MetaTableAccessor: No serialized HRegionInfo in
> keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478579007029/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478579007029/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478579007029/Put/vlen=8/seqid=0}
> {noformat}
> *TestRunner MetaScanner complains about invalid entries in META missing
> HRegionInfo*
> {noformat}
> (standard input):9086:2016-11-08 05:04:17,230 WARN
> [B.defaultRpcServer.handler=4,queue=1,port=16000] hbase.MetaTableAccessor: No
> serialized HRegionInfo in
> keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478581041080/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478581041080/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478581041080/Put/vlen=8/seqid=0}
> {noformat}
> *ITBLL MapReduce tasks fail because part of the keyspace cannot be located:*
> {noformat}
> java.io.IOException: HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478581041080/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478581041080/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478581041080/Put/vlen=8/seqid=0}
> at
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegionInMeta(ConnectionManager.java:1293)
> at
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:1185)
> at
> org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:410)
> at
> org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:359)
> at
> org.apache.hadoop.hbase.client.BufferedMutatorImpl.backgroundFlushCommits(BufferedMutatorImpl.java:238)
> at
> org.apache.hadoop.hbase.client.BufferedMutatorImpl.mutate(BufferedMutatorImpl.java:154)
> at
> org.apache.hadoop.hbase.client.BufferedMutatorImpl.mutate(BufferedMutatorImpl.java:121)
> at
> org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList$Generator$GeneratorMapper.persist(IntegrationTestBigLinkedList.java:486)
> at
> org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList$Generator$GeneratorMapper.map(IntegrationTestBigLinkedList.java:431)
> at
> org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList$Generator$GeneratorMapper.map(IntegrationTestBigLinkedList.java:375)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:170)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1719)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:164)
> {noformat}
> {noformat}
> ./application_1478574724776_0002/container_1478574724776_0002_01_000008/syslog:920:java.io.IOException:
> HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478580288482/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478580288482/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478580288482/Put/vlen=8/seqid=0}
> {noformat}
> {noformat}
> ./application_1478574724776_0002/container_1478574724776_0002_01_000010/syslog:920:java.io.IOException:
> HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478580288482/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478580288482/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478580288482/Put/vlen=8/seqid=0}
> {noformat}
> {noformat}
> ./application_1478574724776_0002/container_1478574724776_0002_01_000011/syslog:909:java.io.IOException:
> HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478580288482/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478580288482/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478580288482/Put/vlen=8/seqid=0}
> {noformat}
> {noformat}
> ./application_1478574724776_0002/container_1478574724776_0002_01_000030/syslog:48:java.io.IOException:
> HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478581041080/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478581041080/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478581041080/Put/vlen=8/seqid=0}
> {noformat}
> {noformat}
> ./application_1478574724776_0002/container_1478574724776_0002_01_000048/syslog:48:java.io.IOException:
> HRegionInfo was null in IntegrationTestBigLinkedList,
> row=keyvalues={IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:seqnumDuringOpen/1478581041080/Put/vlen=8/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:server/1478581041080/Put/vlen=20/seqid=0,
>
> IntegrationTestBigLinkedList,,1478579001155.d55ef81c2f8299abbddfce0445067830./info:serverstartcode/1478581041080/Put/vlen=8/seqid=0}
> {noformat}
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