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https://issues.apache.org/jira/browse/HBASE-15650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15243490#comment-15243490
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Hudson commented on HBASE-15650:
--------------------------------

FAILURE: Integrated in HBase-Trunk_matrix #850 (See 
[https://builds.apache.org/job/HBase-Trunk_matrix/850/])
    HBASE-15650 Remove TimeRangeTracker as point of contention when many 
(stack: rev d815211f5a2583e4b03c627585709872cc711b7e)
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ImmutableSegment.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableSegment.java
* 
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestTimeRangeTracker.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DefaultMemStore.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileWriter.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java
* 
hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/io/TimeRange.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreFlusher.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/Compactor.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/TimeRangeTracker.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java
* 
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/MockStoreFile.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFilePrettyPrinter.java
* 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreSnapshot.java


> Remove TimeRangeTracker as point of contention when many threads reading a 
> StoreFile
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-15650
>                 URL: https://issues.apache.org/jira/browse/HBASE-15650
>             Project: HBase
>          Issue Type: Bug
>          Components: Performance
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.0.0
>
>         Attachments: 15650.branch-1.patch, 15650.branch-1.patch, 15650.patch, 
> 15650.patch, 15650v2.patch, 15650v3.patch, 15650v4.patch, 15650v5.patch, 
> 15650v6.patch, Point-of-contention-on-random-read.png
>
>
> HBASE-12148 is about "Remove TimeRangeTracker as point of contention when 
> many threads writing a Store". It is also a point of contention when reading.



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