[
https://issues.apache.org/jira/browse/HDFS-8883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Anu Engineer updated HDFS-8883:
-------------------------------
Attachment: HDFS-8883.001.patch
* Adds a metric that exposes the FSNameSystemLock Contention
* Added tests to verify that lock contention will produce right metric
* Added tests to verify that JMX exposes these counters
> NameNode Metrics : Add FSNameSystem lock Queue Length
> -----------------------------------------------------
>
> Key: HDFS-8883
> URL: https://issues.apache.org/jira/browse/HDFS-8883
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: HDFS
> Affects Versions: 2.7.1
> Reporter: Anu Engineer
> Assignee: Anu Engineer
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HDFS-8883.001.patch
>
>
> FSNameSystemLock can have contention when NameNode is under load. This patch
> adds LockQueueLength -- the number of threads waiting on FSNameSystemLock --
> as a metric in NameNode.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
