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HBASE-18487 Minor fixes in row lock implementation 

Signed-off-by: Andrew Purtell <apurtell@apache.org>
This commit is contained in:
James Taylor 2017-07-31 12:00:04 -07:00 committed by Andrew Purtell
parent 7bdabed275
commit f67dae90f9
1 changed files with 7 additions and 3 deletions
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10
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
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@ -5404,6 +5404,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
traceScope.getSpan().addTimelineAnnotation("Getting a " + (readLock?"readLock":"writeLock"));
}
boolean success = false;
try {
// Keep trying until we have a lock or error out.
// TODO: do we need to add a time component here?
@ -5434,8 +5435,6 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
traceScope.getSpan().addTimelineAnnotation("Failed to get row lock");
}
result = null;
// Clean up the counts just in case this was the thing keeping the context alive.
rowLockContext.cleanUp();
String message = "Timed out waiting for lock for row: " + rowKey + " in region "
+ getRegionInfo().getEncodedName();
if (reachDeadlineFirst) {
@ -5446,6 +5445,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
}
}
rowLockContext.setThreadName(Thread.currentThread().getName());
success = true;
return result;
} catch (InterruptedException ie) {
LOG.warn("Thread interrupted waiting for lock on row: " + rowKey);
@ -5457,6 +5457,10 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
Thread.currentThread().interrupt();
throw iie;
} finally {
// Clean up the counts just in case this was the thing keeping the context alive.
if (!success && rowLockContext != null) {
rowLockContext.cleanUp();
}
if (traceScope != null) {
traceScope.close();
}
@ -5519,7 +5523,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
long c = count.decrementAndGet();
if (c <= 0) {
synchronized (lock) {
if (count.get() <= 0){
if (count.get() <= 0 && usable.get()){ // Don't attempt to remove row if already removed
usable.set(false);
RowLockContext removed = lockedRows.remove(row);
assert removed == this: "we should never remove a different context";