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https://issues.apache.org/jira/browse/HBASE-18006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022981#comment-16022981
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Zheng Hu commented on HBASE-18006:
----------------------------------
The javadoc said that:
{code}
/**
* Move the region <code>r</code> to <code>dest</code>.
*
* @param encodedRegionName The encoded region name; i.e. the hash that makes
up the region name
* suffix: e.g. if regionname is
*
<code>TestTable,0094429456,1289497600452.527db22f95c8a9e0116f0cc13c680396.</code>,
* then the encoded region name is:
<code>527db22f95c8a9e0116f0cc13c680396</code>.
* @param destServerName The servername of the destination regionserver. If
passed the empty byte
* array we'll assign to a random server. A server name is made of host,
port and startcode.
* Here is an example: <code> host187.example.com,60020,1289493121758</code>
* @throws IOException if we can't find a region named
* <code>encodedRegionName</code>
*/
void move(final byte[] encodedRegionName, final byte[] destServerName)
throws IOException;
{code}
So , we can only pass a encodedRegionName to HBaseAdmin.move() method. In our
HBaseAdmin , some API accept encodedRegionName only , some API need
fullRegionName only , some API accept both encodedRegionName and fulRegionName
, It really confused me sometime. :(
Anyway, it's not a bug, so I closed the issue.
> AsyncClientScanner does not retry openScan RPCs
> -----------------------------------------------
>
> Key: HBASE-18006
> URL: https://issues.apache.org/jira/browse/HBASE-18006
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: hbase-18006-test.patch
>
>
> I have been reading the code for the new async scan paths excessively, and
> noticed that there is a problem in the retrying layer for openScan RPCs.
> In AsyncClientScanner#callOpenScanner() we are doing a open scan RPC. The
> retrying logic comes from using the single rpc retrying caller in
> openScanner(). However, we have the logic for failing the scanner if any of
> the RPC calls here:
> {code}
> stub.scan(controller, request, resp -> {
> if (controller.failed()) {
> future.completeExceptionally(controller.getFailed());
> return;
> }
> future.complete(new OpenScannerResponse(loc, isRegionServerRemote,
> stub, controller, resp));
> });
> {code}
> So, if the open scan gets an UnknownScannerException or something, instead of
> retrying, it just fails the whole scan.
> [~Apache9] FYI.
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