[GitHub] GJL opened a new pull request #6915: [FLINK-10663][streaming] Fix NPE when StreamingFileSink is closed without initialization.

[GitBox <gi...@apache.org>]

GJL opened a new pull request #6915: [FLINK-10663][streaming] Fix NPE when StreamingFileSink is closed without initialization.
URL: https://github.com/apache/flink/pull/6915
 
 
   
   ## What is the purpose of the change
   
   *There is a potential NPE in the StreamingFileSink. If you don't want the NPE, this PR should be merged.*
   
   cc: @kl0u 
   
   ## Brief change log
   
     - *Add null check to `StreamingFileSink#close()`.*
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
     - *Added unit test to `LocalStreamingFileSinkTest`.* 
   
   ## 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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