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https://issues.apache.org/jira/browse/HDFS-14067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687015#comment-16687015
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Plamen Jeliazkov edited comment on HDFS-14067 at 11/14/18 7:32 PM:
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Seems we may need to re-purpose this JIRA.
I am unable to make use of `-forcemanual` properly. The `-transitionToObserver`
command fails to make use of it and if I try to I get "Incorrect number of
arguments". Likely this is because of lines 477-479 of HAAdmin (without .000
patch) where `-transitionToObserver` is not listed as a command that accepts
`-forcemanual`.
FWIW, the .000 patch didn't address it either.
{code:java}
// Mutative commands take FORCEMANUAL option
if ("-transitionToActive".equals(cmd) ||
"-transitionToStandby".equals(cmd) ||
"-failover".equals(cmd)) {
opts.addOption(FORCEMANUAL, false,
"force manual control even if auto-failover is enabled");
}
{code}
was (Author: zero45):
Seems we may need to re-purpose this JIRA.
I am unable to make use of `-forcemanual` properly. The `-transitionToObserver`
command fails to make use of it and if I try to I get "Incorrect number of
arguments". Likely this is because of lines 477-479 of HAAdmin (without .000
patch) where `-transitionToObserver` is not listed as a command that accepts
`-forcemanual`.
{code:java}
// Mutative commands take FORCEMANUAL option
if ("-transitionToActive".equals(cmd) ||
"-transitionToStandby".equals(cmd) ||
"-failover".equals(cmd)) {
opts.addOption(FORCEMANUAL, false,
"force manual control even if auto-failover is enabled");
}
{code}
> 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.
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