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https://issues.apache.org/jira/browse/HADOOP-14518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16045445#comment-16045445
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Mingliang Liu commented on HADOOP-14518:
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Are the stats available to customers, or for Azure internal team only? Either 
way, I'm +1 on the proposal.

The patch:
# {{USER_AGENT_ID_NAME}} -> {{USER_AGENT_ID_KEY}}, and 
{{DEFAULT_USER_AGENT_ID}} -> {{USER_AGENT_ID_DEFAULT}}
# Add doc to index.md and default values to {{core-default.xml}}

> Customize User-Agent header sent in HTTP/HTTPS requests by WASB.
> ----------------------------------------------------------------
>
>                 Key: HADOOP-14518
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14518
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/azure
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Georgi Chalakov
>            Priority: Minor
>         Attachments: HADOOP-14518-01.patch, HADOOP-14518-01-test.txt
>
>
> WASB passes a User-Agent header to the Azure back-end. Right now, it uses the 
> default value set by the Azure Client SDK, so Hadoop traffic doesn't appear 
> any different from general Blob traffic. If we customize the User-Agent 
> header, then it will enable better troubleshooting and analysis by Azure 
> service.
> The following configuration
>   <property>
>     <name>fs.azure.user.agent.id</name>
>     <value>MSFT</value>
>   </property>
> set the user agent to 
>      User-Agent: WASB/3.0.0-alpha4-SNAPSHOT (MSFT) Azure-Storage/4.2.0 
> (JavaJRE 1.8.0_131; WindowsServer2012R2 6.3)
> Test Results :
> Tests run: 703, Failures: 0, Errors: 0, Skipped: 119



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