chenqin opened a new pull request #15442:
URL: https://github.com/apache/flink/pull/15442


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   ## What is the purpose of the change
   
   entropy injection suppose to filter entropy marker in plug able s3 
filesystem, instead, job manager incorrectly view s3 filesystem as non entropy 
fs because of nested file system types difference from task manager. 
   
   The goal of this fix is to accommodate both job manager as well as task 
manager on entropy marker parsing with pluggable filesystem ans make metadata 
path consistent with 1.9 and earlier.
   
   
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Flink-job-cannot-find-recover-path-after-using-entropy-injection-for-s3-file-systems-tp49527p49656.html
   
   
   ## Brief change log
   
   refactor EntropyInjectingFileSystem getEntropyFs if else logic able to 
handle pluggable filesystem.
   adding test coverage on job manager entropy marker handling
   
   ## Verifying this change
   run test job on  yarn cluster, verify job manager generate checkpoint path 
without entropy marker
    
   *(Please pick either of the following options)*
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   *(or)*
   
   This change is already covered by existing tests, such as *(please describe 
tests)*.
   
   *(or)*
   
   This change added tests and can be verified as follows:
   
   *(example:)*
     - *Added integration tests for end-to-end deployment with large payloads 
(100MB)*
     - *Extended integration test for recovery after master (JobManager) 
failure*
     - *Added test that validates that TaskInfo is transferred only once across 
recoveries*
     - *Manually verified the change by running a 4 node cluser with 2 
JobManagers and 4 TaskManagers, a stateful streaming program, and killing one 
JobManager and two TaskManagers during the execution, verifying that recovery 
happens correctly.*
   
   ## Does this pull request potentially affect one of the following parts:
   
   this is backward compatible change, adding handling to checkpoint path not 
covered previously.
   
   ## 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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