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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5041) Major compaction on non existing table does not throw error
Date Fri, 23 Dec 2011 05:15:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175284#comment-13175284

stack commented on HBASE-5041:

I think patch is doing right thing.  Its changing the contract for isRegionName but this is
a private method and you are tightening what was a sloppy contract previous; it looks too
like all instances of isRegionName can benefit from this tightening (is this your though Shrijeet?).

Here's a few comments on the patch:

This bit of code is repeated three time:

+        final String tableName = Bytes.toString(tableNameOrRegionName);
+        if (!MetaReader.tableExists(ct, tableName)) {
+          throw new TableNotFoundException(tableName);
+        }

... which isn't the end of the world but if you are going to cut a new patch..... you might
make a method that returns a String tablename for a table you know exists (else it throws
the TNFE).

Then, given who the author of this patch is, I wonder about the below:

+    CatalogTracker ct = getCatalogTracker();
+    try {
+      return (MetaReader.getRegion(ct, tableNameOrRegionName) != null);
+    } finally {
+      cleanupCatalogTracker(ct);
+    }

We are creating a new CatalogTracker instance.  No one seems to be shutting it down?  Is that
a prob?

Otherwise, patch is good by me.

> Major compaction on non existing table does not throw error 
> ------------------------------------------------------------
>                 Key: HBASE-5041
>                 URL: https://issues.apache.org/jira/browse/HBASE-5041
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver, shell
>    Affects Versions: 0.90.3
>            Reporter: Shrijeet Paliwal
>            Assignee: Shrijeet Paliwal
>             Fix For: 0.92.0, 0.94.0, 0.90.6
>         Attachments: 0001-HBASE-5041-Throw-error-if-table-does-not-exist.patch
> Following will not complain even if fubar does not exist
> {code}
> echo "major_compact 'fubar'" | $HBASE_HOME/bin/hbase shell
> {code}
> The downside for this defect is that major compaction may be skipped due to
> a typo by Ops.

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