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https://issues.apache.org/jira/browse/HDFS-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vinayakumar B updated HDFS-3325:
--------------------------------
Resolution: Fixed
Fix Version/s: 2.8.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Committed to trunk and branch-2.
Thanks [~andreina] for the contribution.
> 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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