[
https://issues.apache.org/jira/browse/HBASE-13333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16159867#comment-16159867
]
Chia-Ping Tsai commented on HBASE-13333:
----------------------------------------
bq. that is hella confusing but I guess correct then
The codes you posted is not committed to branch-1 but master.
{code}
diff --git
a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
index 381505c..6b7f1dd 100644
---
a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
+++
b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
@@ -52,4 +52,10 @@ public interface ResultScanner extends Closeable,
Iterable<Result> {
*/
@Override
void close();
+
+ /**
+ * Allow the client to renew the scanner's lease on the server.
+ * @return true if the lease was successfully renewed, false otherwise.
+ */
+ boolean renewLease();
}
{code}
> Renew Scanner Lease without advancing the RegionScanner
> -------------------------------------------------------
>
> Key: HBASE-13333
> URL: https://issues.apache.org/jira/browse/HBASE-13333
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 2.0.0, 0.98.13, 1.0.2, 1.2.0, 1.1.1
>
> Attachments: 13333-0.98.txt, 13333-master.txt
>
>
> We have a usecase (for Phoenix) where we want to let the server know that the
> client is still around. Like a client-side heartbeat.
> Doing a full heartbeat is complicated, but we could add the ability to make
> scanner call with caching set to 0. The server already does the right thing
> (it renews the lease, but does not advance the scanner).
> It looks like the client (ScannerCallable) also does the right thing. We
> cannot break ResultScanner before HBase 2.0, but we can add a renewLease()
> method to AbstractClientScaner. Phoenix (or any other caller) can then cast
> to ClientScanner and call that method to ensure we renew the lease on the
> server.
> It would be a simple and fully backwards compatible change. [~giacomotaylor]
> Comments?
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
