Jaroslaw Grabowski created FLUME-1779:
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             Summary: Backoff returned from HDFSEventSink after IOException
                 Key: FLUME-1779
                 URL: https://issues.apache.org/jira/browse/FLUME-1779
             Project: Flume
          Issue Type: Bug
            Reporter: Jaroslaw Grabowski


Status.Backoff is returned from HdfsEventSink.process() in case of IOException. 
This behavior prevents FailoverSinkProcessor from pushing event to next sink in 
queue.

In my test case, IOException is caused by serious hdfs failure, for example all 
DataNodes in cluster are dead. After such failure BucketWriter throws 
IOException and becomes unavailable - it probably should be removed from 
sfWriters map.

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