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HBASE-18475 ensure only non-null procedures are sent to requireTableExclusiveLock 

Signed-off-by: Umesh Agashe <uagashe@cloudera.com>
Signed-off-by: Michael Stack <stack@apache.org>
This commit is contained in:
Sean Busbey 2017-07-28 16:04:45 -05:00
parent 4d9982f33d
commit 331a6cface
1 changed files with 10 additions and 0 deletions
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10
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureScheduler.java
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@ -212,6 +212,9 @@ public class MasterProcedureScheduler extends AbstractProcedureScheduler {
}
final Procedure pollResult = rq.peek();
if (pollResult == null) {
return null;
}
final boolean xlockReq = rq.requireExclusiveLock(pollResult);
if (xlockReq && rq.getLockStatus().isLocked() && !rq.getLockStatus().hasLockAccess(pollResult)) {
// someone is already holding the lock (e.g. shared lock). avoid a yield
@ -586,6 +589,9 @@ public class MasterProcedureScheduler extends AbstractProcedureScheduler {
// ============================================================================
// Table Locking Helpers
// ============================================================================
/**
* @param proc must not be null
*/
private static boolean requireTableExclusiveLock(TableProcedureInterface proc) {
switch (proc.getTableOperationType()) {
case CREATE:
@ -1007,6 +1013,10 @@ public class MasterProcedureScheduler extends AbstractProcedureScheduler {
// ============================================================================
private static abstract class Queue<TKey extends Comparable<TKey>>
extends AvlLinkedNode<Queue<TKey>> {
/**
* @param proc must not be null
*/
abstract boolean requireExclusiveLock(Procedure proc);
private final TKey key;