Viraj Jasani created HBASE-23261:
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Summary: Region stuck in transition while splitting
Key: HBASE-23261
URL: https://issues.apache.org/jira/browse/HBASE-23261
Project: HBase
Issue Type: Bug
Affects Versions: 1.3.5
Reporter: Viraj Jasani
Assignee: Viraj Jasani
While splitting, some region gets stuck in transition. After RegionServer
initiates split, ZK has the region marked in RIT ZNode. However, HMaster has
KeeperException with BadVersion for /hbase/region-in-transition/\{region-name}
and hence, it runs rollback/cleanup of failed split of the region. Even after
successful rollback, region is in transition.
{code:java}
2019-11-05 04:07:17,711 INFO [splits-1572926837064] regionserver.SplitRequest -
Successful rollback of failed split of
TABLE1,1572894157455.257ff8985e7a169af0514208b3b0b430.
{code}
{code:java}
2019-11-05 04:07:17,688 INFO [splits-1572926837064] regionserver.SplitRequest -
Running rollback/cleanup of failed split of
TABLE1,1572894157455.257ff8985e7a169af0514208b3b0b430.; Failed getting
SPLITTING znode on TABLE1,1572894157455.257ff8985e7a169af0514208b3b0b430.
{code}
{code:java}
java.io.IOException: Failed getting SPLITTING znode on
TABLE1,1572894157455.257ff8985e7a169af0514208b3b0b430. at
org.apache.hadoop.hbase.coordination.ZKSplitTransactionCoordination.waitForSplitTransaction(ZKSplitTransactionCoordination.java:203)
at
org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.stepsBeforePONR(SplitTransactionImpl.java:383)
at
org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.createDaughters(SplitTransactionImpl.java:278)
at
org.apache.hadoop.hbase.regionserver.SplitTransactionImpl.execute(SplitTransactionImpl.java:561)
at
org.apache.hadoop.hbase.regionserver.SplitRequest.doSplitting(SplitRequest.java:82)
at
org.apache.hadoop.hbase.regionserver.SplitRequest.run(SplitRequest.java:153) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748) Caused by: java.io.IOException: Failed
transition of splitting node
TABLE1,1572894157455.257ff8985e7a169af0514208b3b0b430. at
org.apache.hadoop.hbase.coordination.ZKSplitTransactionCoordination.transitionSplittingNode(ZKSplitTransactionCoordination.java:132)
at
org.apache.hadoop.hbase.coordination.ZKSplitTransactionCoordination.waitForSplitTransaction(ZKSplitTransactionCoordination.java:161)
... 8 more Caused by:
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode =
BadVersion for /hbase/region-in-transition/257ff8985e7a169af0514208b3b0b430 at
org.apache.zookeeper.KeeperException.create(KeeperException.java:115) at
org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at
org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1336) at
org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.setData(RecoverableZooKeeper.java:442)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.setData(ZKUtil.java:818) at
org.apache.hadoop.hbase.zookeeper.ZKAssign.transitionNode(ZKAssign.java:871) at
org.apache.hadoop.hbase.coordination.ZKSplitTransactionCoordination.transitionSplittingNode(ZKSplitTransactionCoordination.java:128)
... 9 more
{code}
{code:java}
2019-11-05 04:07:17,688 INFO [.Worker-pool3-t26826] master.RegionStates -
Transition {257ff8985e7a169af0514208b3b0b430 state=OPEN, ts=1572923178845,
server=rsserver.net,60020,1572890688075} to {257ff8985e7a169af0514208b3b0b430
state=SPLITTING, ts=1572926837688, server=rsserver.net,60020,1572890688075}
{code}
{code:java}
2019-11-05 04:07:17,680 INFO [myid:5] [ead(sid:5 cport:-1):]
server.PrepRequestProcessor - Got user-level KeeperException when processing
sessionid:0x36dd5dc94536a3e type:setData cxid:0x8f8a zxid:0x304fd98ef
txntype:-1 reqpath:n/a Error
Path:/hbase/region-in-transition/257ff8985e7a169af0514208b3b0b430
Error:KeeperErrorCode = BadVersion for
/hbase/region-in-transition/257ff8985e7a169af0514208b3b0b430
{code}
{code:java}
2019-11-05 04:07:17,668 DEBUG [.Worker-pool3-t26826] master.AssignmentManager -
Handling RS_ZK_REQUEST_REGION_SPLIT, server=rsserver.net,60020,1572890688075,
region=257ff8985e7a169af0514208b3b0b430,
current_state={257ff8985e7a169af0514208b3b0b430 state=OPEN, ts=1572923178845,
server=rsserver.net,60020,1572890688075}
{code}
{code:java}
2019-11-05 04:07:17,661 DEBUG [splits-1572926837064]
coordination.ZKSplitTransactionCoordination - Still waiting for master to
process the pending_split for 257ff8985e7a169af0514208b3b0b430
{code}
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