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Date: Tue, 24 Mar 2015 14:34:59 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HDFS-3325) When configuring
 "dfs.namenode.safemode.threshold-pct" to a value greater or equal to 1
 there is mismatch in the UI report
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    [ https://issues.apache.org/jira/browse/HDFS-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14377949#comment-14377949 ] 

Hudson commented on HDFS-3325:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #133 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/133/])
HDFS-3325. When configuring 'dfs.namenode.safemode.threshold-pct' to a value greater or equal to 1 there is mismatch in the UI report (Contributed by J.Andreina) (vinayakumarb: rev c6c396fcd69514ba93583268b2633557c3d74a47)
* 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/TestSafeMode.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHASafeMode.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> When configuring "dfs.namenode.safemode.threshold-pct" to a value greater or equal to 1 there is mismatch in the UI report
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3325
>                 URL: https://issues.apache.org/jira/browse/HDFS-3325
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: J.Andreina
>            Assignee: J.Andreina
>            Priority: Minor
>             Fix For: 2.8.0
>
>         Attachments: HDFS-3325.1.patch, HDFS-3325.2.patch
>
>
> When dfs.namenode.safemode.threshold-pct is configured to n
> Namenode will be in safemode until n percentage of blocks that should satisfy 
>     the minimal replication requirement defined by dfs.namenode.replication.min is reported to namenode
> But in UI it displays that n percentage of total blocks + 1 blocks  are additionally needed
> to come out of the safemode
> Scenario 1:
> ============
> Configurations:
> dfs.namenode.safemode.threshold-pct = 2
> dfs.replication = 2
> dfs.namenode.replication.min =2
> Step 1: Start NN,DN1,DN2
> Step 2: Write a file "a.txt" which has got 167 blocks
> step 3: Stop NN,DN1,DN2
> Step 4: start NN
> In UI report the Number of blocks needed to come out of safemode and number of blocks actually present is different.
> {noformat}
> Cluster Summary
> Security is OFF 
> Safe mode is ON. The reported blocks 0 needs additional 335 blocks to reach the threshold 2.0000 of total blocks 167. Safe mode will be turned off automatically.
> 2 files and directories, 167 blocks = 169 total.
> Heap Memory used 57.05 MB is 2% of Commited Heap Memory 2 GB. Max Heap Memory is 2 GB. 
> Non Heap Memory used 23.37 MB is 17% of Commited Non Heap Memory 130.44 MB. Max Non Heap Memory is 176 MB.{noformat}
> Scenario 2:
> ===========
> Configurations:
> dfs.namenode.safemode.threshold-pct = 1
> dfs.replication = 2
> dfs.namenode.replication.min =2
> Step 1: Start NN,DN1,DN2
> Step 2: Write a file "a.txt" which has got 167 blocks
> step 3: Stop NN,DN1,DN2
> Step 4: start NN
> In UI report the Number of blocks needed to come out of safemode and number of blocks actually present is different
> {noformat}
> Cluster Summary
> Security is OFF 
> Safe mode is ON. The reported blocks 0 needs additional 168 blocks to reach the threshold 1.0000 of total blocks 167. Safe mode will be turned off automatically.
> 2 files and directories, 167 blocks = 169 total.
> Heap Memory used 56.2 MB is 2% of Commited Heap Memory 2 GB. Max Heap Memory is 2 GB. 
> Non Heap Memory used 23.37 MB is 17% of Commited Non Heap Memory 130.44 MB. Max Non Heap Memory is 176 MB.{noformat}


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