[
https://issues.apache.org/jira/browse/HBASE-20654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16492693#comment-16492693
]
Ted Yu commented on HBASE-20654:
--------------------------------
Please refer to the following code in MetricsMasterSourceImpl :
{code}
.tag(Interns.info(DEAD_REGION_SERVERS_NAME, DEAD_REGION_SERVERS_DESC),
masterWrapper.getDeadRegionServers())
{code}
I think exposing each region in transition would be difficult since we don't
know the region names at startup.
We can follow existing metric such as the following:
{code}
"name" : "Hadoop:service=HBase,name=Master,sub=Server",
"modelerType" : "Master,sub=Server",
"tag.liveRegionServers" :
"ctr-e138-1518143905142-329221-01-000002.hwx.site,16020,1527267274818;ctr-e138-1518143905142-329221-01-000003.hwx.site,16020,1527267276442;ctr-e138-1518143905142-329221-01-000005.hwx.site,16020,1527267274409;ctr-e138-1518143905142-329221-01-000006.hwx.site,16020,1527267273345;ctr-e138-1518143905142-329221-01-000007.hwx.site,16020,1527267275021",
"tag.deadRegionServers" : "",
{code}
Meaning, create tag for each region state: OPENING, CLOSED, etc. For each tag,
list the top N (configurable) encoded region names.
> Expose regions in transition thru JMX
> -------------------------------------
>
> Key: HBASE-20654
> URL: https://issues.apache.org/jira/browse/HBASE-20654
> Project: HBase
> Issue Type: Improvement
> Reporter: Ted Yu
> Assignee: liubangchen
> Priority: Major
>
> Currently only the count of regions in transition is exposed thru JMX.
> Here is a sample snippet of the /jmx output:
> {code}
> {
> "beans" : [ {
> ...
> }, {
> "name" : "Hadoop:service=HBase,name=Master,sub=AssignmentManager",
> "modelerType" : "Master,sub=AssignmentManager",
> "tag.Context" : "master",
> ...
> "ritCount" : 3
> {code}
> It would be desirable to expose region name, state for the regions in
> transition as well.
> We can place configurable upper bound on the number of entries returned in
> case there're a lot of regions in transition.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
