[HDFS-4592] Default values for access time precision are out of sync between hdfs-default.xml and the code

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.4-alpha
• Fix Version/s: 2.1.0-beta
• Component/s: namenode
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Assignee: Aaron Myers
• Reporter: Aaron Myers
• Created: 12/Mar/13 06:13
• Updated: 27/Aug/13 22:08
• Resolved: 13/Mar/13 02:34

Description

In hdfs-default.xml we have:

<property>
  <name>dfs.namenode.accesstime.precision</name>
  <value>3600000</value>
  <description>The access time for HDFS file is precise upto this value.
               The default value is 1 hour. Setting a value of 0 disables
               access times for HDFS.
  </description>
</property>

But in FSNamesystem we have:

this.accessTimePrecision = conf.getLong(DFS_NAMENODE_ACCESSTIME_PRECISION_KEY, 0);

We properly define DFS_NAMENODE_ACCESSTIME_PRECISION_DEFAULT in DFSConfigKeys.java, but it's not actually referenced anywhere in the code.