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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/12/02 03:02:00 UTC
[jira] [Updated] (HDFS-15704) Mitigate lease monitor's rapid
infinite loop
[ https://issues.apache.org/jira/browse/HDFS-15704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDFS-15704:
----------------------------------
Labels: pull-request-available (was: )
> Mitigate lease monitor's rapid infinite loop
> --------------------------------------------
>
> Key: HDFS-15704
> URL: https://issues.apache.org/jira/browse/HDFS-15704
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> [~daryn] reported that the lease monitor goes into a rapid infinite loop if an exception occurs during a lease recovery. The two main issues are:
> # lease monitor thread does not sleep if an exception occurs before looping again
> # the loop peeks at the first element of a sorted tree set so when an exception occurs, the "bad" lease remains as the first element preventing recovery of other leases.
> This jira is not intended to fix the underlying issues causing the exception during recovery but merely to mitigate the cited issues.
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