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From "Samarth Jain (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3767) Prevent spurious tracing spans from Hadoop being written in Phoenix Trace tables
Date Fri, 26 May 2017 17:44:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026562#comment-16026562
] 

Samarth Jain commented on PHOENIX-3767:
---------------------------------------

[~karanmehta93], I have committed the patch to 4.x-HBase-1.1, 4.x-HBase-1.2 and master branches.
Will wait for your patch for PHOENIX-3752 for 4.x-HBase-0.98 branch.

> 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
>         Attachments: PHOENIX-3767.001.patch, PHOENIX-3767.002.patch, PHOENIX-3767.003.patch
>
>
> 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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