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https://issues.apache.org/jira/browse/HDFS-8856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14661888#comment-14661888
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Hudson commented on HDFS-8856:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2226 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2226/])
HDFS-8856. Make LeaseManager#countPath O(1). (Contributed by Arpit Agarwal)
(arp: rev 6d4eee718a3fe1450a627128eb94728011bd9b68)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestLeaseManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Checkpointer.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> Make LeaseManager#countPath O(1)
> --------------------------------
>
> Key: HDFS-8856
> URL: https://issues.apache.org/jira/browse/HDFS-8856
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.7.2
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Fix For: 2.8.0
>
> Attachments: HDFS-8856.01.patch, HDFS-8856.02.patch,
> HDFS-8856.03.patch, HDFS-8856.04.patch
>
>
> {{LeaseManager#countPath}} loops over all existing lease holders to compute
> the pending lease count. We can just track the pending leased files so it
> runs in constant time.
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