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HBASE-5329 addRowLock() may allocate duplicate lock id, causing the client to be blocked (Ian Varley) 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1376489 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Zhihong Yu 2012-08-23 13:48:39 +00:00
parent 8c811a6994
commit bbe297121d
1 changed files with 9 additions and 6 deletions
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15
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
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@ -51,6 +51,7 @@ import java.util.SortedMap;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
@ -320,7 +321,7 @@ public class HRegionServer implements ClientProtocol,
// Port we put up the webui on.
protected int webuiport = -1;
Map<String, Integer> rowlocks = new ConcurrentHashMap<String, Integer>();
ConcurrentMap<String, Integer> rowlocks = new ConcurrentHashMap<String, Integer>();
// A state before we go into stopped state. At this stage we're closing user
// space regions.
@ -2753,11 +2754,13 @@ public class HRegionServer implements ClientProtocol,
return this.fsOk;
}
protected long addRowLock(Integer r, HRegion region)
throws LeaseStillHeldException {
long lockId = nextLong();
String lockName = String.valueOf(lockId);
rowlocks.put(lockName, r);
protected long addRowLock(Integer r, HRegion region) throws LeaseStillHeldException {
String lockName = null;
long lockId;
do {
lockId = nextLong();
lockName = String.valueOf(lockId);
} while (rowlocks.putIfAbsent(lockName, r) != null);
this.leases.createLease(lockName, this.rowLockLeaseTimeoutPeriod, new RowLockListener(lockName,
region));
return lockId;