[HDFS-12198] Document missing namenode metrics that were added recently

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha4
• Fix Version/s: 2.9.0, 3.0.0-beta1
• Component/s: documentation
• Target Version/s: 3.0.0-beta1
• Hadoop Flags: Reviewed
• Assignee: Yiqun Lin
• Reporter: Yiqun Lin
• Created: 26/Jul/17 03:56
• Updated: 08/Aug/17 11:37
• Resolved: 08/Aug/17 11:37

Description

There are some namenode metrics added recently but haven't been documented in Metrics.md. Totally following metrics and related JIRAs:

HDFS-12043:

  @Metric ("Number of successful re-replications")
   MutableCounterLong successfulReReplications;
   @Metric ("Number of times we failed to schedule a block re-replication.")
   MutableCounterLong numTimesReReplicationNotScheduled;
   @Metric("Number of timed out block re-replications")
  MutableCounterLong timeoutReReplications;

HDFS-11907:

@Metric("Resource check time") private MutableRate resourceCheckTime;
private final MutableQuantiles[] resourceCheckTimeQuantiles;
 

HADOOP-14502:

@Metric("Number of blockReports from individual storages")
 final MutableRate storageBlockReport;
 final MutableQuantiles[] storageBlockReportQuantiles;