Kihwal Lee created HDFS-7603:
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Summary: The background replication queue initialization may not
let other run
Key: HDFS-7603
URL: https://issues.apache.org/jira/browse/HDFS-7603
Project: Hadoop HDFS
Issue Type: Bug
Components: rolling upgrades
Reporter: Kihwal Lee
Priority: Critical
The background replication queue initialization processes configured number of
blocks at a time and releases the namesystem write lock. This was to let
namenode start serving right after a standby to active transition or leaving
safe mode. However, this does not allow others to run much if the lock
fairness is set to "unfair" for the higher throughput.
I propose adding a delay between unlocking and locking in the async repl queue
init thread.
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