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Yu Li commented on HBASE-16626: ------------------------------- We also encountered HBASE-16609, and I guess more will expose if there's any since we already start A/B testing for the offheap backpoted version, JFYI. > User customized RegionScanner from 1.X is incompatible with 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: 1.2.2, 1.1.6 > 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(). It is because the customized scanner didn't > override the shipped method yet. > Instead of forcing every user to add a empty implementation(if they don't > really need to scan the file or the RS don't use L2 cache, they don't need to > do anything in shipped method) , adding a default method of shipped in > Interface RegionScanner might be a better way. -- This message was sent by Atlassian JIRA (v6.3.4#6332)