[jira] [Created] (FLINK-4709) InputStreamFSInputWrapper does not close wrapped stream

[Shang Yuanchun (Jira)]

Holger Frydrych created FLINK-4709:
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             Summary: InputStreamFSInputWrapper does not close wrapped stream
                 Key: FLINK-4709
                 URL: https://issues.apache.org/jira/browse/FLINK-4709
             Project: Flink
          Issue Type: Bug
          Components: Core
    Affects Versions: 1.1.2, 1.0.3
            Reporter: Holger Frydrych


In FileInputFormat::decorateInputStream (flink.api.common.io), if the inputStream gets wrapped by an InputStreamFSInputWrapper, it will never get closed. FileInputFormat does call close() on its stream, but the wrapper does not implement close() to forward this call to the wrapped stream. This leads to a resource leak which can eventually exhaust the maximum number of open file handles allowed if processing a lot of input files.



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