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Erik Krogen commented on HDFS-12131: ------------------------------------ Ah, thank you for the pointer [~shahrs87]! I was trying to find where to put unit tests but couldn't find any in {{TestFSNamesystem}}/{{TestFSNamesystemMBean}}. Attached v001 patch. > Add some of the FSNamesystem JMX values as metrics > -------------------------------------------------- > > Key: HDFS-12131 > URL: https://issues.apache.org/jira/browse/HDFS-12131 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs, namenode > Reporter: Erik Krogen > Assignee: Erik Krogen > Priority: Minor > Attachments: HDFS-12131.000.patch > > > A number of useful numbers are emitted via the FSNamesystem JMX, but not > through the metrics system. These would be useful to be able to track over > time, e.g. to alert on via standard metrics systems or to view trends and > rate changes: > * NumLiveDataNodes > * NumDeadDataNodes > * NumDecomLiveDataNodes > * NumDecomDeadDataNodes > * NumDecommissioningDataNodes > * NumStaleStorages > This is a simple change that just requires annotating the JMX methods with > {{@Metric}}. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org