merlimat commented on PR #22841:
URL: https://github.com/apache/pulsar/pull/22841#issuecomment-2148367070
I don't think this is caused by having a single-thread processing the
metadata-store callbacks (which should be typically solved by avoiding mixing
sync/async calls).
In this case it looks just a deadlock in the `BookieRackAffinityMapping`
code. The blocking of the metadata-callback thread is purely a side effect of
the `ManagedLedgerFactoryImpl` map lock being held by the other thread.
It would be useful to see which thread is holding that lock:
```
- parking to wait for <0x00001000f838ac60> (a
java.util.concurrent.CompletableFuture$Signaller)
```
Can you search for it in the full stack trace?
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