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https://issues.apache.org/jira/browse/HADOOP-11196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14169467#comment-14169467
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Mostafa Elhemali commented on HADOOP-11196:
-------------------------------------------
Sample exception from Flume:
{{
flume.sink.hdfs.BucketWriter.getRefIsClosed:210) - isFileClosed is not
available in the version of HDFS being used. Flume will not attempt to close
files if the close fails on the first attempt
java.lang.NoSuchMethodException:
org.apache.hadoop.fs.azure.NativeAzureFileSystem.isFileClosed(org.apache.hadoop.fs.Path)
at java.lang.Class.getMethod(Class.java:1665)
at
org.apache.flume.sink.hdfs.BucketWriter.getRefIsClosed(BucketWriter.java:207)
at org.apache.flume.sink.hdfs.BucketWriter.open(BucketWriter.java:295)
at org.apache.flume.sink.hdfs.BucketWriter.append(BucketWriter.java:584)
at
org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:426)
at
org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
at java.lang.Thread.run(Thread.java:745)
}}
> Implement isFileClosed in WASB to make Flume happy
> --------------------------------------------------
>
> Key: HADOOP-11196
> URL: https://issues.apache.org/jira/browse/HADOOP-11196
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.5.1
> Reporter: Mostafa Elhemali
> Priority: Minor
>
> Flume uses reflection to call isFileClosed() which is a method implemented by
> DFS but not part of the FileSystem abstract base class. It still works if the
> function is not implemented, but issues a lot of warnings and is distracting.
> It would help make it work smoother if we added the same method in the
> NativeAzureFileSystem class.
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