[
https://issues.apache.org/jira/browse/HBASE-17069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15867762#comment-15867762
]
Abhishek Singh Chouhan commented on HBASE-17069:
------------------------------------------------
[~Apache9] Yep got confused a bit there :) retrowIOException might be better.
Got to the bottom of things. Here's what was happening.
- Region A getting split into B & C. The first request with daughter info is a
multi (with hregion info) while the second one is a put.
In Hregion.processRowsWithLocks we have
{noformat}
// 6. Append no sync
if (!walEdit.isEmpty()) {
// we use HLogKey here instead of WALKey directly to support legacy
coprocessors.
walKey = new HLogKey(this.getRegionInfo().getEncodedNameAsBytes(),
this.htableDescriptor.getTableName(), WALKey.NO_SEQUENCE_ID, now,
processor.getClusterIds(), nonceGroup, nonce, mvcc);
txid = this.wal.append(this.htableDescriptor, this.getRegionInfo(),
walKey, walEdit, false);
}
{noformat}
Since we pass false for inMemstore in append, we mess up the seq id accounting.
In SequenceIdAccounting.update() we pass false for the multirequest (lets say
sequence id here was 1) so lowestunflusedsequenceid is not updated.
Now for the second put that goes through doMiniBatchMutation we pass true
correctly during append(Seq id 2). lowestUnflushedSequenceIds is set to 2 for
the metafamily. The rs sends the report using HRegion.setCompleteSequenceId
where it sets the lastflushedsequence id for this store as 1 (however we still
haven't actually flushed).
- At this point the RS dies
- During the split we receive lastflushedseqid for this store as 1 and filter
out the cells belonging to the multi which had the hregioninfo. The
regionserver thats opening the region now will replay the edits correctly but
we've lost data belonging to the multi and hence the client fails with
"HRegionInfo was null"
However this case is not particular to split or meta but the case where a
region is just opened and we do a number of multi followed by a put, in case
the RS dies before we flush we lose data belonging to the multi. Fix is simply
a line change :)
[~apurtell] [~lhofhansl]
> 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
> Assignee: Abhishek Singh Chouhan
> 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}
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
