[
https://issues.apache.org/jira/browse/HDFS-14914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Fengnan Li updated HDFS-14914:
------------------------------
Description:
When observer is in safemode, calling getBlockLocations will make it throw
RetriableException as in HDFS-13898. However, during startup the safemode is
taking a really long time and retry would not help much here.
The change is to make the exception to be failover so that client side can
failover. Currently ObserverReadProxyProvider always failover regardless
RetriableException or StandbyException so it doesn't get affected.
was:
When observer is in safemode, calling getBlockLocations will make it throw
RetriableException as in HDFS-13898. However, during startup the safemode is
taking a really long time and retry would not help much here.
The change is to make it failover so that Router can immediately try another
Observer or Active namenode (depends on the design). The current
ObserverReadProxyProvider doesn't get affected since both RetriableException
and StandbyException will make it failover.
> Observer should throw StandbyException in Safemode
> --------------------------------------------------
>
> Key: HDFS-14914
> URL: https://issues.apache.org/jira/browse/HDFS-14914
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Fengnan Li
> Assignee: Fengnan Li
> Priority: Minor
> Attachments: HDFS-14914-001.patch
>
>
> When observer is in safemode, calling getBlockLocations will make it throw
> RetriableException as in HDFS-13898. However, during startup the safemode is
> taking a really long time and retry would not help much here.
> The change is to make the exception to be failover so that client side can
> failover. Currently ObserverReadProxyProvider always failover regardless
> RetriableException or StandbyException so it doesn't get affected.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
