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https://issues.apache.org/jira/browse/BEAM-6707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16802047#comment-16802047
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Chamikara Jayalath commented on BEAM-6707:
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Why would FileSystems.rename(srcFiles, dstFiles,
StandardMoveOptions.IGNORE_MISSING_FILES); not raise an exception when there's
some sort of an error ?
I think, if GCS returned an exception that will be raised here. But if the
source file is not available but the corresponding destination file is already
there (meaning that this file was copied in a previous run of the same
workitem) we will just ignore that.
> TextIO.Write appear success but request not sent to Google Cloud Storage
> ------------------------------------------------------------------------
>
> Key: BEAM-6707
> URL: https://issues.apache.org/jira/browse/BEAM-6707
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.8.0
> Environment: Google Cloud Dataflow and Google Cloud Storage
> Reporter: Wei Cheng A
> Priority: Major
>
> Google Cloud Dataflow is being used to run Apache Beam job.
> from the Dataflow log, the file operation appear to be success.
> Will copy temporary file FileResult{tempFilename=gs://xxxxxx, shard=0,
> window=org.apache.beam.sdk.transforms.windowing.GlobalWindow@xxxxx,
> paneInfo=PaneInfo{isFirst=true, isLast=true, timing=ON_TIME, index=0,
> onTimeIndex=0}} to final location gs://xxxx/20190211.csv
> But when I checked GCS and its log, there was no put or post request during
> that time.
> This issue happened intermittently. The file is copied successfully
> sometimes, after retry.
> I have checked the relevant Beam source code
> https://github.com/apache/beam/blob/c96b096b77c324b886ab94aebcf320976002c0d4/sdks/java/core/src/main/java/org/apache/beam/sdk/io/FileBasedSink.java#L763
> and
> https://github.com/apache/beam/blob/c96b096b77c324b886ab94aebcf320976002c0d4/sdks/java/core/src/main/java/org/apache/beam/sdk/io/FileSystems.java#L304
> seems like in rename() method, there are multiple conditions that the method
> would return without Exception and appear as "success" in log.
> Is there any bug in these Beam methods or I should check for error in my code?
> {code:java}
> TextIO.write().withoutSharding().to(options.getOutFilePath()));
> {code}
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