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https://issues.apache.org/jira/browse/FLINK-14144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212435#comment-17212435
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Matthias commented on FLINK-14144:
----------------------------------
I was looking into
[FLIP-104|https://cwiki.apache.org/confluence/display/FLINK/FLIP-104%3A+Add+More+Metrics+to+Jobmanager]
after kind of finalizing
[FLIP-102|https://cwiki.apache.org/confluence/display/FLINK/FLIP-102%3A+Add+More+Metrics+to+TaskManager]
from the backend perspective. But I realized that there does not seem to be
any work necessary on the backend site. The metrics REST API actually returns
the values of the metrics. You have to pass a GET parameter called {{get}}
having a comma-separated list of metrics you'd like to access:
{code}http://localhost:8081/jobmanager/metrics?get=taskSlotsTotal,Status.JVM.GarbageCollector.global.Time,Status.JVM.GarbageCollector.global.Count{code}
The query above will return something like:
{code:java}
[
{
"id": "Status.JVM.GarbageCollector.global.Count",
"value": "0"
},{
"id": "Status.JVM.GarbageCollector.global.Time",
"value": "0"
},{
"id": "taskSlotsTotal",
"value": "2"
}
]
{code}
That's also the way you have to access the metrics in FLINK-15328.
> Add Metric for job manager
> --------------------------
>
> Key: FLINK-14144
> URL: https://issues.apache.org/jira/browse/FLINK-14144
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Web Frontend
> Reporter: Yadong Xie
> Priority: Major
>
> There is a metric tab in each taskmanager page, but there is no metric data
> in the job manager, it would be better for users to monitor the cluster with
> job manager metrics.
> The
> [API|https://ci.apache.org/projects/flink/flink-docs-stable/monitoring/rest_api.html#jobmanager-metrics]
> provided now could only get the metric key without a value.
> REST API needed:
> add metrics value in /jobmanager/metrics API
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