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Key: HDFS-788
URL: https://issues.apache.org/jira/browse/HDFS-788
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Reporter: Todd Lipcon
FSDataset.getNextVolume() uses FSVolume.getAvailable() to determine whether to allocate a block on a volume. This doesn't factor in other in-flight blocks that have been "promised" space on the volume. The resulting issue is that, if a volume is nearly full but not full, multiple blocks will be allocated on that volume, and then they will all hit "Out of space" errors during the write.
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