when client call lockRow,region server may allocate duplicated lock id, this
may cause that client is blocked.
---------------------------------------------------------------------------------------------------------------
Key: HBASE-5329
URL: https://issues.apache.org/jira/browse/HBASE-5329
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.90.3
Environment: Red Hat Enterprise Linux Server release 5.4
Reporter: liaoxiangui
protected long addRowLock(Integer r, HRegion region) throws
LeaseStillHeldException
{
long lockId = -1L;
lockId = rand.nextLong(); //!!!may generate duplicated
id，bug?
String lockName = String.valueOf(lockId);
rowlocks.put(lockName, r);
this.leases.createLease(lockName, new RowLockListener(lockName,
region));
return lockId;
}
In addRowLock(),rand may generate duplicated lock id, it may cause regionserver
throw exception(Leases$LeaseStillHeldException).The client will be blocked
until old rowlock is released.
2012-02-03 15:21:50,084 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer: Error obtaining row lock
(fsOk: true)
org.apache.hadoop.hbase.regionserver.Leases$LeaseStillHeldException
at
org.apache.hadoop.hbase.regionserver.Leases.createLease(Leases.java:150)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.addRowLock(HRegionServer.java:1986)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.lockRow(HRegionServer.java:1963)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1039)
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