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HBASE-20975 Lock may not be taken or released while rolling back procedure

This commit is contained in:
Allan Yang 2018-08-13 20:23:04 +08:00
parent 21e02813fe
commit a07e755625
1 changed files with 4 additions and 12 deletions
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16
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java
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@ -1363,29 +1363,21 @@ public class ProcedureExecutor<TEnvironment> {
assert subprocStack != null : "Called rollback with no steps executed rootProc=" + rootProc;
int stackTail = subprocStack.size();
boolean reuseLock = false;
while (stackTail --> 0) {
while (stackTail-- > 0) {
Procedure<TEnvironment> proc = subprocStack.get(stackTail);
LockState lockState;
if (!reuseLock && (lockState = acquireLock(proc)) != LockState.LOCK_ACQUIRED) {
LockState lockState = acquireLock(proc);
if (lockState != LockState.LOCK_ACQUIRED) {
// can't take a lock on the procedure, add the root-proc back on the
// queue waiting for the lock availability
return lockState;
}
lockState = executeRollback(proc);
releaseLock(proc, false);
boolean abortRollback = lockState != LockState.LOCK_ACQUIRED;
abortRollback |= !isRunning() || !store.isRunning();
// If the next procedure is the same to this one
// (e.g. StateMachineProcedure reuse the same instance)
// we can avoid to lock/unlock each step
reuseLock = stackTail > 0 && (subprocStack.get(stackTail - 1) == proc) && !abortRollback;
if (!reuseLock && proc.hasLock()) {
releaseLock(proc, false);
}
// allows to kill the executor before something is stored to the wal.
// useful to test the procedure recovery.
if (abortRollback) {