michaeljmarshall commented on a change in pull request #12123:
URL: https://github.com/apache/pulsar/pull/12123#discussion_r713583729
##########
File path:
tiered-storage/jcloud/src/main/java/org/apache/bookkeeper/mledger/offload/jcloud/impl/BlobStoreBackedReadHandleImpl.java
##########
@@ -54,6 +56,15 @@
private final DataInputStream dataStream;
private final ExecutorService executor;
+ enum State {
+ Opened,
+ Closed
+ }
+
+ private AtomicReferenceFieldUpdater<BlobStoreBackedReadHandleImpl, State>
STATE_UPDATER = AtomicReferenceFieldUpdater
+ .newUpdater(BlobStoreBackedReadHandleImpl.class, State.class, "state");
+ private volatile State state = null;
Review comment:
I'm not sure that we need these concurrency controls. The `executor` in
this class is a single thread. Therefore, a local `state` variable should be
sufficient as long as we only update the variable from within the `executor`'s
thread.
##########
File path:
tiered-storage/jcloud/src/main/java/org/apache/bookkeeper/mledger/offload/jcloud/impl/BlobStoreBackedReadHandleImpl.java
##########
@@ -105,6 +118,11 @@ public LedgerMetadata getLedgerMetadata() {
long nextExpectedId = firstEntry;
try {
while (entriesToRead > 0) {
+ State state = STATE_UPDATER.get(this);
+ if (state == State.Closed) {
+ log.warn("Reading a closed read handler. Ledger
ID: {}, Read range: {}-{}", ledgerId, firstEntry, lastEntry);
+ throw new
BKException.BKUnexpectedConditionException();
Review comment:
Should this complete the `promise` exceptionally?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
