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https://issues.apache.org/jira/browse/HDFS-14130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16722831#comment-16722831
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xiangheng edited comment on HDFS-14130 at 12/17/18 9:50 AM:
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Hey [~shv],Thanks for your answer,
I think make ZKFC aware of Observer state is important for HDFS-13182---Allow
Observer to participate in NameNode failover.
{quote}{{1.prevent ZKFC from commanding Obserbers to transition to SBN}}
{quote}
But this point seems to conflict with the HDFS-13182,is it?
And the design documents say that
● Transitions between Standbys and Observers are bidirectional.
it should allow Obserbers to auto failover to SBN in the failover
environment?In that case,Prohibit ZKFC process on Observers doesn't seem to be
a good solution.please correct me if I make any mistakes,thank you.
was (Author: xiangheng):
Hey [~shv],Thanks for your answer,
I think make ZKFC aware of Observer state is important for HDFS-13182---Allow
Observer to participate in NameNode failover.
{quote}{{1.prevent ZKFC from commanding Obserbers to transition to SBN}}
{quote}
But this point seems to conflict with the HDFS-13182,is it?
And the design documents say that
● Transitions between Standbys and Observers are bidirectional.
it should allow Obserbers to auto failover to SBN in the failover
environment,so,Prohibit ZKFC process on Observers doesn't seem to be a good
solution.please correct me if I make any mistakes,thank you.
> Make ZKFC ObserverNode aware
> ----------------------------
>
> Key: HDFS-14130
> URL: https://issues.apache.org/jira/browse/HDFS-14130
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: HDFS-12943
> Reporter: Konstantin Shvachko
> Priority: Major
>
> Need to fix automatic failover with ZKFC. Currently it does not know about
> ObserverNodes trying to convert them to SBNs.
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