Broken master failover
----------------------
Key: HBASE-1851
URL: https://issues.apache.org/jira/browse/HBASE-1851
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Master crashed, SIGSEGV (0xb) at pc=0x00000031a40fea07, pid=14689,
tid=1133910336. Four other masters running ready to take the failover. I see
where we move to new master but there is an error:
{code}
2009-09-13 22:07:02,061 DEBUG
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Wrote master address
XX.XX.XX.251:20000 to ZooKeeper
2009-09-13 22:07:02,064 WARN
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Failed to set state node in
ZooKeeper
org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode =
NodeExists for /hbase/shutdown
at org.apache.zookeeper.KeeperException.create(KeeperException.java:110)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:522)
at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.setClusterState(ZooKeeperWrapper.java:279)
at
org.apache.hadoop.hbase.master.HMaster.writeAddressToZooKeeper(HMaster.java:270)
at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:255)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.apache.hadoop.hbase.master.HMaster.doMain(HMaster.java:1200)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1241)
{code}
Is /hbase/shutdown now ephemeral?
Otherwise, the transition went off well it seems.
Except, if I look in zk -- this is a good while after teh event -- I do not see
a master.. its empty. Do we not record in zk on failover?
But then a split comes in:
2009-09-17 05:50:05,070 INFO org.apache.hadoop.hbase.master.BaseScanner: All 1
.META. region(s) scanned
2009-09-17 05:50:30,745 INFO org.apache.hadoop.hbase.master.ServerManager:
Processing MSG_REPORT_SPLIT: enwikibase_dumpurls,,1253145470066: Daughters;
enwikibase_dum
purls,,1253166628107,
enwikibase_dumpurls,EzAdzwPBtG_o9BLsEqu4bV\x3D\x3D,1253166628107 from
aa0-018-6.u.powerset.com,20020,1251458355425; 1 of 3
2009-09-17 05:50:30,745 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.44.91:20020, startcode: 1251458355425, load:
(requests=0, r
egions=3, usedHeap=490, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
2009-09-17 05:50:30,838 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.44.49:20020, startcode: 1250638276455, load:
(requests=3, r
egions=4, usedHeap=134, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
2009-09-17 05:50:31,117 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.45.128:20020, startcode: 1250638269214, load:
(requests=5,
regions=4, usedHeap=130, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
2009-09-17 05:50:31,119 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.45.221:20020, startcode: 1250638268709, load:
(requests=5,
regions=4, usedHeap=82, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
2009-09-17 05:50:31,150 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.44.75:20020, startcode: 1250638276632, load:
(requests=9, r
egions=4, usedHeap=284, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
2009-09-17 05:50:31,215 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.45.180:20020, startcode: 1250638269143, load:
(requests=11,
regions=4, usedHeap=132, maxHeap=2031): total nregions to assign=2, nregions
to reach balance=4, isMetaAssign=false
2009-09-17 05:50:31,265 DEBUG org.apache.hadoop.hbase.master.RegionManager:
Assigning for address: XX.XX.45.121:20020, startcode: 1250638269297, load:
(requests=5,
regions=4, usedHeap=54, maxHeap=2031): total nregions to assign=2, nregions to
reach balance=4, isMetaAssign=false
...
And we never recover from the above (12 hours and still at it).
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