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Erik Krogen commented on HDFS-14067: ------------------------------------ {quote} Is the concern about that the states could be cached somewhere? or potential conflicts between manual and auto failover, where a standby could be involved in both? {quote} I think more along the latter. Maybe let me rephrase my question: for what reason are manual transitions between active and standby disallowed, and what is different about the standby/observer transition that makes it allowed? Intuitively it makes sense, but we should be careful about any assumptions that we might break. > Allow manual failover between standby and observer > -------------------------------------------------- > > Key: HDFS-14067 > URL: https://issues.apache.org/jira/browse/HDFS-14067 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Chao Sun > Assignee: Chao Sun > Priority: Major > Attachments: HDFS-14067-HDFS-12943.000.patch > > > Currently if automatic failover is enabled in a HA environment, transition > from standby to observer would be blocked: > {code} > [hdfs@*** hadoop-3.3.0-SNAPSHOT]$ bin/hdfs haadmin -transitionToObserver ha2 > Automatic failover is enabled for NameNode at **** > Refusing to manually manage HA state, since it may cause > a split-brain scenario or other incorrect state. > If you are very sure you know what you are doing, please > specify the --forcemanual flag. > {code} > We should allow manual transition between standby and observer in this case. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org