[GitHub] [pulsar] rdhabalia opened a new pull request #11754: [pulsar-client] clean up MultiTopicsConsumerImpl reference on consumer creation failure

[GitBox]

rdhabalia opened a new pull request #11754:
URL: https://github.com/apache/pulsar/pull/11754


   ### Motivation
   
   Partitioned-topic Consumer doesn't cleanup the resources when it fails to 
create consumer, and it creates memory leak if consumer creation is keep 
failing with non-recoverable error (eg: `BusySubscriptionError`) which makes 
application unstable. One of the issue is `unAckedMessageTracker` timer, which 
still keeps consumer reference even after closing the timer-task in cleanup 
method and consume-creation failure introduces memory leak with objects 
associated with timer-task.
   
   
![image](https://user-images.githubusercontent.com/2898254/130532756-90850175-c59f-4f2e-a220-df2d0bc363af.png)
   
   
   ### Modification
   Close and clean timer task references.


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