Technoboy- opened a new pull request, #16403:
URL: https://github.com/apache/pulsar/pull/16403
Cherry-pick #12602
### Motivation
For the non-durable cursor, the ledgers trimming task will cause skip the
removed ledgers
to avoid readers introduced backlogs and make sure the data can be removed
if over the retention,
more details to see #6787.
But for a topic that enabled compaction, this will lead to the reader
skipping the compacted data.
The newly added test can illustrate this problem well. For reading compacted
data, reading a message ID
that earlier that the first message ID of the original data is normal
behavior, so we should not
move forward the cursor which will read the compacted data.
### Documentation
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- [ ] `doc-required`
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- [ ] `doc`
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