[
https://issues.apache.org/jira/browse/HBASE-13421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14486122#comment-14486122
]
Hudson commented on HBASE-13421:
--------------------------------
FAILURE: Integrated in HBase-TRUNK #6359 (See
[https://builds.apache.org/job/HBase-TRUNK/6359/])
HBASE-13421 Reduce the number of object creations introduced by HBASE-11544 in
scan RPC hot code paths (stack: rev 62d47e175c7c36dc2bd6b225d03978cd6303fc59)
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestStripeCompactionPolicy.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestMergeTool.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/ColumnAggregationEndpoint.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/ColumnAggregationEndpointWithErrors.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScannerContext.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoprocessorInterface.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/ColumnAggregationEndpointNullResponse.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestReplicasClient.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestReversibleScanners.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestPrefixTree.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/Compactor.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestBlocksScanned.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestKeepDeletes.java
*
hbase-examples/src/main/java/org/apache/hadoop/hbase/coprocessor/example/RowCountEndpoint.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultipleColumnPrefixFilter.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestAtomicOperation.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestScannerSelectionUsingTTL.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/AggregateImplementation.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWideScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiColumnScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStripeCompactor.java
* hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlLists.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java
*
hbase-examples/src/main/java/org/apache/hadoop/hbase/coprocessor/example/BulkDeleteEndpoint.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSeekOptimizations.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionMergeTransaction.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/client/ClientSideRegionScanner.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/NoLimitScannerContext.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestColumnPrefixFilter.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIntraRowPagination.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplay.java
*
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestScannerSelectionUsingKeyRange.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInvocationRecordFilter.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestColumnSeeking.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransaction.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanWithBloomError.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java
> Reduce the number of object creations introduced by HBASE-11544 in scan RPC
> hot code paths
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-13421
> URL: https://issues.apache.org/jira/browse/HBASE-13421
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jonathan Lawlor
> Assignee: Jonathan Lawlor
> Fix For: 2.0.0, 1.1.0
>
> Attachments: HBASE-13421-branch-1.patch, HBASE-13421-v1.patch,
> HBASE-13421-v2.patch, HBASE-13421-v3.patch
>
>
> HBASE-11544 made NextState the new return type of RegionScanner#nextRaw
> InternalScanner#next to allow state information to be passed back from a
> scanner (it was formerly a boolean indicating whether or not more values
> existed). The change in this return type led to an increased amount of
> objects being created... In the case that a scan spanned millions of rows,
> there was the potential for millions of object to be created.
> This issue looks to reduce the large amount of object creations from
> potentially many to at most one per RPC request.
> Please see the tail of the parent issue for relevant discussion on the design
> decisions related to this solution. This sub-task has been filed as it seems
> more appropriate to address the fix here rather than as an addendum to the
> parent.
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