[jira] [Created] (PHOENIX-3067) Phoenix metrics system should not be started in pseudo-cluster mode

["Enis Soztutar (JIRA)" <ji...@apache.org>]

Enis Soztutar created PHOENIX-3067:
--------------------------------------

             Summary: Phoenix metrics system should not be started in pseudo-cluster mode
                 Key: PHOENIX-3067
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3067
             Project: Phoenix
          Issue Type: Bug
            Reporter: Enis Soztutar
            Assignee: Enis Soztutar
             Fix For: 4.9.0


Phoenix tracing piggy-backs on the metrics system by specifying a SpanReceiver which is also a MetricsSource (TraceMetricsSource). 

This works differently on client side versus server side. The hadoop metrics system should only be initialized once, and can only have a single prefix (hbase or phoenix, etc). We configure the metric sink through hadoop-metrics2.properties differently in client side versus server side [1]. 

Hadoop metric system is designed so that if it is initialized already with some prefix (like hbase), re-initializing it again will be ignored unless it is in "mini-cluster mode". We do not check whether the metrics is already initialized from {{Metrics.java}} and blindly call {{DefaultMetricsSystem.instance().init("phoenix")}} which works as long as we are in distributed mode. Otherwise, the metrics sinks do not work. 

[1] https://phoenix.apache.org/tracing.html



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)