GitHub user glaksh100 opened a pull request:

    https://github.com/apache/flink/pull/5860

    [FLINK-9138][filesystem-connectors] Implement time based rollover in 
BucketingSink

    ## What is the purpose of the change
    
    This pull request enables a time-based rollover of the part file in the 
BucketingSink. This is particularly applicable when when write throughput is 
low and helps data become available at a fixed interval, for consumption.
    
    ## Brief change log
      - Add a `batchRolloverInterval` field with a setter 
      - Track a `firstWrittenToTime` for the bucket state
      - Check for `currentProcessingTime` - `firstWrittenToTime` > 
`batchRolloverInterval` and roll over if true
    
    ## Verifying this change
    
    This change added tests and can be verified as follows:
    
      - Added a `testRolloverInterval` test method to the `BucketingSinkTest`
    
    ## 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)


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/glaksh100/flink 
FLINK-9138.bucketingSinkRolloverInterval

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/5860.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5860
    
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commit fee3ba293f4db4ad2d39b4ac0f3993711da9bda6
Author: Lakshmi Gururaja Rao <lgururajarao@...>
Date:   2018-04-16T23:31:49Z

    [FLINK-9138] Implement time based rollover of part file in BucketingSink

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