thetumbled commented on code in PR #19662:
URL: https://github.com/apache/pulsar/pull/19662#discussion_r1122521829
##########
pulsar-transaction/coordinator/src/main/java/org/apache/pulsar/transaction/coordinator/impl/MLTransactionMetadataStore.java:
##########
@@ -400,6 +400,10 @@ public CompletableFuture<Void> updateTxnStatus(TxnID
txnID, TxnStatus newStatus,
appendLogCount.increment();
try {
synchronized (txnMetaListPair.getLeft()) {
+ if (txnMetaListPair.getLeft().status() ==
newStatus) {
Review Comment:
for 2: Lines 385 to 388 can't avoid race condition, so i check the state
status in synchronized block.
for 3: this can be fixed easily, we just delete the duplicate transaction
logs.
```
transactionLog.deletePosition(Collections.singletonList(position));
```
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