J.Andreina created HDFS-3325:
--------------------------------
Summary: 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
Reporter: J.Andreina
Fix For: 2.0.0, 3.0.0
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}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
