Reid Chan created HDFS-11760:
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Summary: Make CHECK_CANCEL_INTERVAL configurable
Key: HDFS-11760
URL: https://issues.apache.org/jira/browse/HDFS-11760
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 3.0.0-alpha2, 3.0.0-alpha1, 2.7.3, 2.7.2, 2.7.1, 2.7.0
Reporter: Reid Chan
Priority: Minor
There's a case in my company: when two namenodes tried to transit state,
checkpoint took place in standbynode and it didn't check cancellation until
every after 4096 inodes saved, which took too much time between checks in our
case and caused state transition fail at the end. After we changed it to 50,
state transition succeed.
The {noformat}CHECK_CANCEL_INTERVAL{noformat} was introduced in HDFS-7097 and
set to 4096, previously was 50. There may be some reasons for the choice of
4096, but i'm not sure that, so I suggest to make it configurable.
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