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From "Xinyi Yan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-4936) Empty resultset returned when hbase.rpc.timeout hit
Date Tue, 12 Feb 2019 00:51:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-4936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16765572#comment-16765572
] 

Xinyi Yan commented on PHOENIX-4936:
------------------------------------

It has empty/bad results problem with HBase 0.98, but not with HBase 1.1+. This is because
HBase 0.98 has no way to enforce a timeout limit on a scan RPC request. For a large table,
such as SYSTEM.CATALOG, the region server takes a while to execute the scan, and it might
cause:
 # timeouts on the client side.
 # an empty/bad result is returned by the region server.

The region server cuts time and returns whatever results it has accumulated up to that point
to the client, and the client side can't interpret this as an exhausted table/region or no
results are retrieved.
 
Empty/bad result issues can be found at HBase Jira https://issues.apache.org/jira/browse/HBASE-13090

 

Should we close this issue? [~vincentpoon] [~tdsilva] [~karanmehta93] 

> Empty resultset returned when hbase.rpc.timeout hit
> ---------------------------------------------------
>
>                 Key: PHOENIX-4936
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4936
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.14.0
>            Reporter: Vincent Poon
>            Assignee: Xinyi Yan
>            Priority: Blocker
>              Labels: SFDC
>             Fix For: 4.15.0, 5.1.0
>
>
> Seeing this on a large syscat table (~11gb)
> From sqlline, issue a SELECT statement which does a full table scan
> hbase.rpc.timeout gets hit, and instead of getting an exception, an empty resultset is
silently returned.



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