Jack Tolfree

> > We suspect the exception is being thrown by std::recursive_mutex when trying to aquire the lock in: > > You can enable the debug level logs to verify your...

> I think it should be caused by > > https://github.com/apache/pulsar-client-cpp/blob/d2094828f9fe756b315ba194e1f8a69ca24ac6b4/lib/UnAckedMessageTrackerEnabled.cc#L38 > > We should catch `shared_from_this()` rather than `&` to ensure the this pointer is valid when the callback...

Thank you for the prompt investigation and PR. I have run against this patch and I do not see a crash. There is however a slight change in behaviour. If...

I tried changing/reducing the operationTimeout, but I don't see any difference, subscribe does not return. Please see logs attached. Also for clarity, this is the rough code snippet. `void subscribeClient()...