HDFS 20 append: Disallow pipeline recovery if a file is already being lease
recovered
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Key: HDFS-1555
URL: https://issues.apache.org/jira/browse/HDFS-1555
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 0.20-append
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.20-append
When a file is under lease recovery and the writer is still alive, the write
pipeline will be killed and then the writer will start a pipeline recovery.
Sometimes the pipeline recovery may race before the lease recovery and as a
result fail the lease recovery. This is very bad if we want to support the
strong recoverLease semantics in HDFS-1554. So it would be nice if we could
disallow a file's pipeline recovery while its lease recovery is in progress.
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