michaeljmarshall commented on code in PR #20242:
URL: https://github.com/apache/pulsar/pull/20242#discussion_r1188120436
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pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerImpl.java:
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@@ -2153,9 +2153,14 @@ private CompletableFuture<Void> seekAsyncInternal(long
requestId, ByteBuf seek,
MessageIdAdv originSeekMessageId = seekMessageId;
seekMessageId = (MessageIdAdv) seekId;
- duringSeek.set(true);
+
+ if (!duringSeek.compareAndSet(false, true)) {
+ log.warn("[{}][{}] Attempting to seek operation that is already in
progress, cancelling {}",
+ topic, subscription, seekBy);
+ seekFuture.cancel(true);
Review Comment:
Nit: I think an `IllegalStateException` would be a clearer exception
indicating to the user that it was not a valid time to call this method. One
problem with `CancellationException` is that it has no message. However, I see
that there is a warning log indicating the problem, so it might be fine.
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