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• I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker.

User environment

Broker version: 3.1.1

Issue Description

In KoP Test OffsetResetTest#testLessThanStartOffset, there is a test case:

1. Trim Topic ledger
2. Send 5 messages to Topic.
3. Set consumer offset to 0.
4. Consume messages from Topic.

Expect consumed message num to be 5. But some times, actual consumed message num is 0.

After debugging, I found it is related to pulsar NonDurableCursor.

Error messages

Reproducing the issue

Run KoP Test OffsetResetTest#testLessThanStartOffset. A machine with high load may increase the chances to reproduce.

Or run NonDurableCursorTest#testOpenNonDurableCursorWhileLedgerIsAddingFirstEntryAfterTrimmed.

Additional information

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!