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https://issues.apache.org/jira/browse/HDFS-5156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757253#comment-13757253
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Akira AJISAKA commented on HDFS-5156:
-------------------------------------
Attached a patch for SafeModeTime metrics to record "total" safemode time.
Furthermore, the patch enables StateChangeLog to show the interval between
safemode enters and leaves like below.
{code}
13/09/03 16:35:22 INFO hdfs.StateChange: STATE* Leaving safe mode after 3 secs
{code}
In trunk, it shows the interval between FSNameSystem starts and safemode leaves.
> SafeModeTime metrics sometimes includes non-Safemode time.
> ----------------------------------------------------------
>
> Key: HDFS-5156
> URL: https://issues.apache.org/jira/browse/HDFS-5156
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.1.0-beta
> Reporter: Akira AJISAKA
> Labels: metrics
> Attachments: HDFS-5156.patch
>
>
> SafeModeTime metrics shows duration in safe mode startup. However, this
> metrics is set to the time from FSNameSystem starts whenever safe mode
> leaves. In the result, executing "hdfs dfsadmin -safemode enter" and "hdfs
> dfsadmin -safemode leave", the metrics includes non-Safemode time.
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