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https://issues.apache.org/jira/browse/IMPALA-12060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Abhishek Rawat updated IMPALA-12060:
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Description: Today Impala doesn't support multiple catalogd instances to be
part of the cluster. When using external Active Passive HA mechanisms like
leader election, it may be possible for multiple catalog replicas to be part of
the cluster, in some cases. This is mainly because catalogds have no idea that
there are other catalogd instances. One way to address this issue could be for
statestore to always ensure that there could only be a single instance of
catalogd in the cluster. Coordinator also has a config `catalog_service_host` -
both statestore and coordinator should have a consistent view and consider the
proper catalogd instance to be part of the cluster. (was: Today Impala doesn't
support multiple catalogd instances to be part of the cluster. When using
external Active Passive HA mechanisms like leader election, it may be possible
for multiple catalog replicas to be part of the cluster, in some cases. This is
mainly because catalogds have no idea that there are other catalogd instances.
One way to address this issue could be for statestore to always ensure that
there could only be a single instance of catalogd in the cluster. )
> statestore should only allow a single catalog instance to be part of cluster
> ----------------------------------------------------------------------------
>
> Key: IMPALA-12060
> URL: https://issues.apache.org/jira/browse/IMPALA-12060
> Project: IMPALA
> Issue Type: Bug
> Reporter: Abhishek Rawat
> Assignee: Abhishek Rawat
> Priority: Critical
>
> Today Impala doesn't support multiple catalogd instances to be part of the
> cluster. When using external Active Passive HA mechanisms like leader
> election, it may be possible for multiple catalog replicas to be part of the
> cluster, in some cases. This is mainly because catalogds have no idea that
> there are other catalogd instances. One way to address this issue could be
> for statestore to always ensure that there could only be a single instance of
> catalogd in the cluster. Coordinator also has a config `catalog_service_host`
> - both statestore and coordinator should have a consistent view and consider
> the proper catalogd instance to be part of the cluster.
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