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https://issues.apache.org/jira/browse/YARN-4029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14679826#comment-14679826
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Bibin A Chundatt commented on YARN-4029:
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*Diagnostics value null on recovery*
In {{RMAppImpl}} during recovery {{diagnostics}} is set as below
{{RMAppImpl#recover(RMState state)}}
{code}
this.diagnostics.append(appState.getDiagnostics());
{code}
So {{null}} gets appended to {{diagnostics}};
AppBlock checks for *null* but value is string *'null'*
{code}
overviewTable._("Diagnostics:",
app.getDiagnosticsInfo() == null ? "" : app.getDiagnosticsInfo());
{code}
*LogAggregationStatus to NOT_START*
In state store we are not adding LogAggregation status.
{{ApplicationStateData}} need to be updated.
Should i handle updation to addition to Store? or in {{AppBlock}} check for
status of app and if completed then show {{N/A}}.
Any thoughts on this?
> LogAggregationStatus and Diagnostics value wrong after RM switch
> ----------------------------------------------------------------
>
> Key: YARN-4029
> URL: https://issues.apache.org/jira/browse/YARN-4029
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Attachments: Image.jpg
>
>
> Steps to reproduce
> ================
> 1.Submit mapreduce application
> 2.Wait for completion
> 3.Once application is completed switch RM
> *Log Aggregation Status* and *Diagnostics* are changing
> *Log Aggregation Status* from SUCCESS to NOT_START
> *Diagnostics* from EMPTY to null
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