[ https://issues.apache.org/jira/browse/HBASE-13333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525881#comment-14525881 ]
Hudson commented on HBASE-13333: -------------------------------- FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #928 (See [https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/928/]) HBASE-13333 Renew Scanner Lease without advancing the RegionScanner. (larsh: rev f2bfe84f77d20ba8737d7d550c02e0df7a772747) * hbase-server/src/main/java/org/apache/hadoop/hbase/client/TableSnapshotScanner.java * hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java * hbase-client/src/main/java/org/apache/hadoop/hbase/client/AbstractClientScanner.java * hbase-server/src/main/java/org/apache/hadoop/hbase/client/ClientSideRegionScanner.java * hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java > 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, 1.1.1 > > 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 (v6.3.4#6332)