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https://issues.apache.org/jira/browse/HBASE-19861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16515366#comment-16515366
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Nihal Jain edited comment on HBASE-19861 at 6/18/18 5:56 AM:
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Hi, just wondering, the backup master UI does not list any user/system tables.
Is this behaviour intentional? I mean do we intend to list tables only on
active master?
Does the backup master's memory does have user/system table names? I don't
think so, hence it comes out to be empty. Right?
I think we should fall back to rpc based listing in case of backup master and
can have this improvement in case of active master.
was (Author: nihaljain.cs):
Hi, just wondering, the backup master UI does not list any user/system tables.
Is this behaviour intentional? I mean do we intend to list tables only on
active master?
> Avoid using RPCs when querying table infos for master status pages
> ------------------------------------------------------------------
>
> Key: HBASE-19861
> URL: https://issues.apache.org/jira/browse/HBASE-19861
> Project: HBase
> Issue Type: Improvement
> Components: UI
> Reporter: Xiaolin Ha
> Assignee: Xiaolin Ha
> Priority: Major
> Fix For: 2.0.0-beta-2, 2.0.0
>
> Attachments: 19861.4.patch, HBASE-19861.v1.patch,
> HBASE-19861.v3.patch, HBASE-19861.v4.patch, errorMsgExample.png
>
>
> When querying table information for master status pages, currently method is
> using admin interfaces. For example, when list user tables, codes are as
> follows.
> Connection connection = master.getConnection();
> Admin admin = connection.getAdmin();
> try {
> tables = admin.listTables();
> } finally {
> admin.close();
> }
> But actually, we can get all user tables from master's memory.
> Using admin interfaces means using RPCs, which has a low efficiency.
>
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