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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (HDDS-1353) Metrics scm_pipeline_metrics_num_pipeline_creation_failed keeps increasing because of BackgroundPipelineCreator
Date Wed, 03 Apr 2019 20:39:00 GMT

     [ https://issues.apache.org/jira/browse/HDDS-1353?focusedWorklogId=222607&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-222607
]

ASF GitHub Bot logged work on HDDS-1353:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Apr/19 20:38
            Start Date: 03/Apr/19 20:38
    Worklog Time Spent: 10m 
      Work Description: vivekratnavel commented on issue #681: HDDS-1353 : Metrics scm_pipeline_metrics_num_pipeline_creation_failed
keeps increasing because of BackgroundPipelineCreator.
URL: https://github.com/apache/hadoop/pull/681#issuecomment-479649552
 
 
   +1 LGTM
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 222607)
    Time Spent: 50m  (was: 40m)

> Metrics scm_pipeline_metrics_num_pipeline_creation_failed keeps increasing because of
BackgroundPipelineCreator
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HDDS-1353
>                 URL: https://issues.apache.org/jira/browse/HDDS-1353
>             Project: Hadoop Distributed Data Store
>          Issue Type: Improvement
>          Components: SCM
>            Reporter: Elek, Marton
>            Assignee: Aravindan Vijayan
>            Priority: Minor
>              Labels: newbie, pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> There is a {{BackgroundPipelineCreator}} thread in SCM which runs in a fixed interval
and tries to create pipelines. This BackgroundPipelineCreator uses {{IOException}} as exit
criteria (no more pipelines can be created). In each run of BackgroundPipelineCreator we exit
when we are not able to create any more pipelines, i.e. when we get IOException while trying
to create the pipeline. This means that {{scm_pipeline_metrics_num_pipeline_creation_failed}}
value will get incremented in each run of BackgroundPipelineCreator.



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