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From "Matteo Bertozzi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13058) Hbase shell command 'scan' for non existent table shows unnecessary info for one unrelated existent table.
Date Tue, 24 Feb 2015 14:51:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14334949#comment-14334949
] 

Matteo Bertozzi commented on HBASE-13058:
-----------------------------------------

[~saint.ack@gmail.com] [~a72877] this patch is not right. it is the undo of HBASE-10533

> Hbase shell command 'scan' for non existent table shows unnecessary info for one unrelated
existent table.
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-13058
>                 URL: https://issues.apache.org/jira/browse/HBASE-13058
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>            Reporter: Abhishek Kumar
>            Priority: Trivial
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: 0001-HBASE-13058-Error-messages-in-scan-table.patch, 0001-HBASE-13058-shell-unknown-table-message-update.patch
>
>
> When scanning for a non existent table in hbase shell, error message in shell  sometimes(based
on META table content) displays completely unrelated table info , which seems to be unnecessary
and inconsistent with other error messages:
> {noformat}
> hbase(main):016:0> scan 'noTable'
> ROW                                              COLUMN+CELL
> ERROR: Unknown table Table 'noTable' was not found, got: hbase:namespace.!
> ---------------------------------------------------------------------------------------------
> hbase(main):017:0> scan '01_noTable'
> ROW                                              COLUMN+CELL
> ERROR: Unknown table 01_noTable!
> --------------------------------------------------
> {noformat}
> Its happening when doing a META table scan (to locate input table ) and scanner stops
at row of another table (beyond which table can not exist) in ConnectionManager.locateRegionInMeta:
> {noformat}
> private RegionLocations locateRegionInMeta(TableName tableName, byte[] row,
>                    boolean useCache, boolean retry, int replicaId) throws IOException
{
> .................................
> ................................
> // possible we got a region of a different table...
>           if (!regionInfo.getTable().equals(tableName)) {
>             throw new TableNotFoundException(
>                   "Table '" + tableName + "' was not found, got: " +
>                   regionInfo.getTable() + ".");
>           }
> ...............................
> ...............................
> {noformat}
> Here, we can simply put a debug message(if required) and just throw the TableNotFoundException(tableName)
 with only tableName instead of with scanner positioned row.



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