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https://issues.apache.org/jira/browse/HBASE-9457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13762248#comment-13762248
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Jimmy Xiang commented on HBASE-9457:
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Yes, it is hard to ensure that, especially when those region server recovery
cases are considered, even harder if log replay is considered.
To undo the special namespace system table assignment, we need to change how
namespace is initialized. Currently ZKNamespaceManager can be initiated only
after the namespace table is assigned. However ZKNamespaceManager is not used
any where. If we are ok to (1) put ZKNamespaceManager aisde for now or just
remove it, (2) initiate TableNamespaceManager lazily only when it is needed,
then we can undo it.
> Master could fail start if region server with system table is down
> ------------------------------------------------------------------
>
> Key: HBASE-9457
> URL: https://issues.apache.org/jira/browse/HBASE-9457
> Project: HBase
> Issue Type: Bug
> Components: master, Region Assignment
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Critical
>
> In the region server holding the system table is killed while master is
> starting, master will hang there waiting for system table to be assigned
> which won't happen.
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