Race between BlockPoolSliceScanner and append
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Key: HDFS-2525
URL: https://issues.apache.org/jira/browse/HDFS-2525
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Priority: Critical
I wrote a test which runs append() in a loop on a single file with a single
replica, appending 0~100 bytes each time. If this races with the
BlockPoolSliceScanner, I observe the BlockPoolSliceScanner getting FNFE, then
reporting the block as bad to the NN. This causes the writer thread to loop
forever on completeFile() since it doesn't see a valid replica.
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