chunhui shen created HBASE-7504:
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Summary: -ROOT- may be offline forever after FullGC of RS
Key: HBASE-7504
URL: https://issues.apache.org/jira/browse/HBASE-7504
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.3
Reporter: chunhui shen
Assignee: chunhui shen
1.FullGC happen on ROOT regionserver.
2.ZK session timeout, master expire the regionserver and submit to
ServerShutdownHandler
3.Regionserver complete the FullGC
4.In the process of ServerShutdownHandler, verifyRootRegionLocation returns true
5.ServerShutdownHandler skip assigning -ROOT- region
6.Regionserver abort itself because it reveive YouAreDeadException after a
regionserver report
7.-ROO- is offline now, and won't be assigned any more unless we restart master
Master Log:
{code}
2012-10-31 19:51:39,043 DEBUG org.apache.hadoop.hbase.master.ServerManager:
Added=dw88.kgb.sqa.cm4,60020,1351671478752 to dead servers, submitted shutdown
handler to be executed, root=true, meta=false
2012-10-31 19:51:39,045 INFO
org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Splitting logs
for dw88.kgb.sqa.cm4,60020,1351671478752
2012-10-31 19:51:50,113 INFO
org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Server
dw88.kgb.sqa.cm4,60020,1351671478752 was carrying ROOT. Trying to assign.
2012-10-31 19:52:15,939 DEBUG org.apache.hadoop.hbase.master.ServerManager:
Server REPORT rejected; currently processing
dw88.kgb.sqa.cm4,60020,1351671478752 as dead server
2012-10-31 19:52:15,945 INFO
org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Skipping log
splitting for dw88.kgb.sqa.cm4,60020,1351671478752
{code}
No log of assigning -ROOT-
Regionserver log:
{code}
2012-10-31 19:52:15,923 WARN org.apache.hadoop.hbase.util.Sleeper: We slept
229128ms instead of 100000ms, this is likely due to a long garbage collecting
pause and it's usually bad, see
http://hbase.apache.org/book.html#trouble.rs.runtime.zkexpired
{code}
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