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https://issues.apache.org/jira/browse/PHOENIX-3757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16177698#comment-16177698
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Ankit Singhal commented on PHOENIX-3757:
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bq. if namespace mapping is enabled then the name is automatically transformed
to SYSTEM:MUTEX and it results in TABLE_NOT_FOUND_EXCEPTION
Yes, I think offline upgrade can fail with TABLE_NOT_FOUND_EXCEPTION.(online
upgrade should not have any problem).
> System mutex table not being created in SYSTEM namespace when namespace
> mapping is enabled
> ------------------------------------------------------------------------------------------
>
> Key: PHOENIX-3757
> URL: https://issues.apache.org/jira/browse/PHOENIX-3757
> Project: Phoenix
> Issue Type: Bug
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Critical
> Labels: namespaces
> Fix For: 4.12.0
>
> Attachments: PHOENIX-3757.001.patch, PHOENIX-3757.002.patch
>
>
> Noticed this issue while writing a test for PHOENIX-3756:
> The SYSTEM.MUTEX table is always created in the default namespace, even when
> {{phoenix.schema.isNamespaceMappingEnabled=true}}. At a glance, it looks like
> the logic for the other system tables isn't applied to the mutex table.
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