[jira] [Updated] (HDDS-2166) Some RPC metrics are missing from SCM prometheus endpoint

["Elek, Marton (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-2166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Elek, Marton updated HDDS-2166:
-------------------------------
    Status: Patch Available  (was: Open)

> Some RPC metrics are missing from SCM prometheus endpoint
> ---------------------------------------------------------
>
>                 Key: HDDS-2166
>                 URL: https://issues.apache.org/jira/browse/HDDS-2166
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In Hadoop metrics it's possible to register multiple metrics with the same name but with different tags. For example each RpcServere has an own metrics instance in SCM.
> {code}
>     "name" : "Hadoop:service=StorageContainerManager,name=RpcActivityForPort9860",
>     "name" : "Hadoop:service=StorageContainerManager,name=RpcActivityForPort9863",
> {code}
> They are converted by PrometheusSink to a prometheus metric line with proper name and tags. For example:
> {code}
> rpc_rpc_queue_time60s_num_ops{port="9860",servername="StorageContainerLocationProtocolService",context="rpc",hostname="72736061cbc5"} 0
> {code}
> The PrometheusSink uses a Map to cache all the recent values but unfortunately the key contains only the name (rpc_rpc_queue_time60s_num_ops in our example) but not the tags (port=...)
> For this reason if there are multiple metrics with the same name, only the first one will be displayed.
> As a result in SCM only the metrics of the first RPC server can be exported to the prometheus endpoint. 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org