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https://issues.apache.org/jira/browse/HDFS-14758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-14758:
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Fix Version/s: 2.9.3
2.8.6
> Decrease lease hard limit
> -------------------------
>
> Key: HDFS-14758
> URL: https://issues.apache.org/jira/browse/HDFS-14758
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Eric Payne
> Assignee: hemanthboyina
> Priority: Minor
> Fix For: 3.3.0, 2.8.6, 2.9.3, 3.1.4, 3.2.2, 2.10.1
>
> Attachments: HDFS-14758.001.patch, HDFS-14758.002.patch,
> HDFS-14758.003.patch, HDFS-14758.004.patch, HDFS-14758.005.patch,
> HDFS-14758.005.patch, HDFS-14758.006.patch
>
>
> The hard limit is currently hard-coded to be 1 hour. This also determines the
> NN automatic lease recovery interval. Something like 20 min will make more
> sense.
> After the 5 min soft limit, other clients can recover the lease. If no one
> else takes the lease away, the original client still can renew the lease
> within the hard limit. So even after a NN full GC of 8 minutes, leases can be
> still valid.
> However, there is one risk in reducing the hard limit. E.g. Reduced to 20
> min. If the NN crashes and the manual failover takes more than 20 minutes,
> clients will abort.
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