wsry opened a new pull request #10472: [FLINK-14872][runtime] Temporary fix for 
potential deadlock problem when tasks read from blocking ResultPartitions.
URL: https://github.com/apache/flink/pull/10472
 
 
   ## What is the purpose of the change
   
   This commit implements a temporary fix for the potential deadlock problem 
reported in FLINK-14872. The problem itself is not solved completely, however 
the possibility of deadlock is largely reduced. We leave the proper fix of this 
problem to the future version. Because the fix does not solve the deadlock 
problem completely and the fix is trivial, so no new test is attached.
   
   
   ## Brief change log
   
     - Reduce the max size of local buffer pool from ```Integer.MAX_VALUE``` to 
```floatingNetworkBuffersPerGate``` for InputGates reading from blocking result 
partition.
   
   
   ## Verifying this change
   
   Because the fix does not solve the deadlock problem completely and the fix 
is trivial, so no new test is attached.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** 
/ don't know)
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (**not applicable** / docs / 
JavaDocs / not documented)
   

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