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HBASE-26832 Check epoch in AsyncFSWAL#syncCompleted, to avoid repeated release of flushed wal entries #4190

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HBASE-26832 Check epoch in AsyncFSWAL#syncCompleted, to avoid repeated release of flushed wal entries #4190

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19 changes: 16 additions & 3 deletions hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java
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Original file line number Diff line number Diff line change
Expand Up @@ -343,12 +343,25 @@ private void syncFailed(long epochWhenSync, Throwable error) {
}
}

private void syncCompleted(AsyncWriter writer, long processedTxid, long startTimeNs) {
private void syncCompleted(long epochWhenSync, AsyncWriter writer, long processedTxid,
long startTimeNs) {
highestSyncedTxid.set(processedTxid);
boolean epochChanged = false;
consumeLock.lock();
try {
int currentEpochAndState = epochAndState;
if (epoch(currentEpochAndState) != epochWhenSync) {
epochChanged = true;
}
} finally {
consumeLock.unlock();
}
for (Iterator<FSWALEntry> iter = unackedAppends.iterator(); iter.hasNext();) {
FSWALEntry entry = iter.next();
if (entry.getTxid() <= processedTxid) {
entry.release();
if (!epochChanged) {
entry.release();
}
iter.remove();
} else {
break;
Expand Down Expand Up @@ -399,7 +412,7 @@ private void sync(AsyncWriter writer) {
if (error != null) {
syncFailed(epoch, error);
} else {
syncCompleted(writer, currentHighestProcessedAppendTxid, startTimeNs);
syncCompleted(epoch, writer, currentHighestProcessedAppendTxid, startTimeNs);
}
}, consumeExecutor);
}
Expand Down