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From "Charlie Qiangeng Xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-16626) User customized RegionScanner from 1.X is incompatible in 2.0.0's off heap part
Date Tue, 13 Sep 2016 11:47:22 GMT
Charlie Qiangeng Xu created HBASE-16626:
-------------------------------------------

             Summary: User customized RegionScanner from 1.X is incompatible in 2.0.0's off
heap part
                 Key: HBASE-16626
                 URL: https://issues.apache.org/jira/browse/HBASE-16626
             Project: HBase
          Issue Type: Sub-task
          Components: Offheaping
    Affects Versions: 1.1.6, 1.2.2
            Reporter: Charlie Qiangeng Xu
             Fix For: 2.0.0


Introduced by 2.0.0's off-heap feature, the interface RegionScanner extends a new interface
Shipper which contains a  "shipped()" method. 
In our case, some application user defined customized scanner that 
implements Interface RegionScanner in 1.X . After we back ported the Off Heap feature of 2.0.0,
RegionScannerShippedCallBack throws a "java.lang.AbstractMethodError" when executing scanner.shipped();

Instead of forcing every one of our users to add a empty implementation(if they don't really
need to scan the file or the RS don't use L2 cache) , adding a default method of shipped might
be a better way.(since HBASE-15624 we decide to use JAVA8 only in 2.0.0)




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