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From "Karan Mehta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-3767) Prevent spurious tracing spans from Hadoop being written in Phoenix Trace tables
Date Thu, 06 Apr 2017 00:28:41 GMT
Karan Mehta created PHOENIX-3767:
------------------------------------

             Summary: Prevent spurious tracing spans from Hadoop being written in Phoenix
Trace tables
                 Key: PHOENIX-3767
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3767
             Project: Phoenix
          Issue Type: Bug
            Reporter: Karan Mehta
            Assignee: Karan Mehta


PHOENIX-3752 is the JIRA to remove Hadoop Metrics-2 system from the Phoenix Framework, whose
task is to deliver the received HTrace spans to the phoenix table. When replacing this system
with a simple one as discussed on this JIRA, one of the current test {{testClientServerIndexingTracing()}}
triggers a bug in Hadoop (HDFS-11583), which causes spurious {{writeTo}} spans being generated
from {{DataStreamer}} class. 

Since Phoenix implements its {{SpanReceiver}} to receive the HTrace spans, all these spans
are redirected over here, which eventually get persisted into Phoenix tables with the system
developed in PHOENIX-3752. The information is useless and might use up unnecessary space.


This JIRA is to add a patch to ignore those spans and prevent them from being written to Phoenix
tables. 



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