congbobo184 commented on code in PR #18981:
URL: https://github.com/apache/pulsar/pull/18981#discussion_r1052827107
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pulsar-client/src/main/java/org/apache/pulsar/client/impl/MessageIdImpl.java:
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@@ -204,11 +204,13 @@ public byte[] toByteArray() {
@Override
public int compareTo(@Nonnull MessageId o) {
if (o instanceof MessageIdImpl) {
+ if (o instanceof BatchMessageIdImpl) {
+ throw new
UnsupportedOperationException(this.getClass().getName()
Review Comment:
We should prohibit comparing the two types. This is not the correct behavior
for users. In what scenario will they compare BatchMessageId and MessageId? Now
that you have decided to throw an exception, why not just forbid it?
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