Append/flush should support concurrent "tailer" use case
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Key: HDFS-1060
URL: https://issues.apache.org/jira/browse/HDFS-1060
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node, hdfs client
Affects Versions: 0.21.0, 0.22.0
Reporter: Todd Lipcon
Several people have a usecase for a writer logging edits and using hflush()
while one or more readers "tails" the file by periodically reopening and
seeking to get the latest bytes. Currently there are several bugs. Using this
ticket as a supertask for those bugs (and to add test cases for this use case)
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