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Handling exceptions while closing BeamSink #294

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@KKcorps KKcorps commented Apr 10, 2019

Currently Flink is not able to close the BeamSink properly when Tranquility isn't initialised properly in open method. The initialisation can be prohibited due to NoClassDefFoundError in usual scenarios due to dependency conflicts. As a result Flink throws

ERROR org.apache.flink.streaming.runtime.tasks.StreamTask - Error during disposal of stream operator.
java.util.NoSuchElementException: None.get

This pull request catches this error and simply logs it.

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KKcorps commented May 29, 2019

Hi
In absence of this exception handling the tranquilizer is not able to close properly and leads to unexpected failures when run inside docker or yarn

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