[jira] [Created] (FLINK-9367) Truncate() in BucketingSink is only allowed after hadoop2.7

[Shang Yuanchun (Jira)]

zhangxinyu created FLINK-9367:
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             Summary: Truncate() in BucketingSink is only allowed after hadoop2.7
                 Key: FLINK-9367
                 URL: https://issues.apache.org/jira/browse/FLINK-9367
             Project: Flink
          Issue Type: Improvement
          Components: Streaming Connectors
    Affects Versions: 1.5.0
            Reporter: zhangxinyu
             Fix For: 1.5.0


When output to HDFS using BucketingSink, truncate() is only allowed after hadoop2.7.
If some tasks failed, the ".valid-length" file is created for the lower version hadoop.

The problem is, if other people want to use the data in HDFS, they must know how to deal with the ".valid-length" file, otherwise, the data may be not exactly-once.

I think it's not convenient for other people to use the data. Why not just read the in-progress file and write a new file when restoring instead of writing a ".valid-length" file.

In this way, others who use the data in HDFS don't need to know how to deal with the ".valid-length" file.



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