coderzc commented on code in PR #17164:
URL: https://github.com/apache/pulsar/pull/17164#discussion_r972556310
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managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
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@@ -350,21 +356,48 @@ public void operationComplete(Void result, Stat stat) {
public void operationFailed(MetaStoreException e) {
log.error("[{}] Error while updating ledger cursor: {}
properties {}", ledger.getName(),
name, cursorProperties, e);
- updateCursorPropertiesResult.completeExceptionally(e);
+ // if resource is updated by other operate then we
will get bad-version exception
+ // so, retry the operation.
+ if (e instanceof
ManagedLedgerException.BadVersionException) {
+
asyncReadAndUpdateCursorProperties(updateFunction).whenComplete((__, ex) -> {
Review Comment:
> If we want to update the key A to value 1 (current is 0)
Another operation removed the key A
After the retry, we will put key A back
I think the zookeeper will guarantee that the task execution sequence and
all callbacks are executed serially in the same thread, so it conforms to
linearizable semantics.
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