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https://issues.apache.org/jira/browse/HADOOP-16903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17053424#comment-17053424
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Steve Loughran commented on HADOOP-16903:
-----------------------------------------

[~arunravimv] if you want a suffix, you will need to add a new option; no 
fundamental reason why we would block that.

Name wise, we could declare the current value deprecated and have two new 
values, say

* {{fs.azure.user.agent.custom.prefix}}
* {{fs.azure.user.agent.custom.suffix}}

and the original value would map to {{fs.azure.user.agent.custom.prefix}} with 
a warning printed whenever it was used.

Patches with tests welcome





> fs.azure.user.agent.prefix adds customisation as suffix.
> --------------------------------------------------------
>
>                 Key: HADOOP-16903
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16903
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/azure
>    Affects Versions: 3.2.0
>            Reporter: Arun Ravi M V
>            Priority: Minor
>
> Setting fs.azure.user.agent.prefix adds customization as suffix
> eg: when I set `fs.azure.user.agent.prefix` to my email the user agent value 
> is 
> Azure Blob FS/1.0 (DBFS) (JavaJRE 1.8.0_232; Linux 4.15.0-1050-azure; 
> SunJSSE-1.8) arunrav...@gmail.com
>  I believe this is inconsistent with the similar setting in AWS S3 
> fs.s3a.user.agent.prefix where the customization is added as a prefix. I 
> believe that it would be great if we make this consistent with configuration 
> name.
>  
> The proposed change is to fix the AbfsClient.initializeUserAgent.
>  
> We use a user agent information available in cloud service logs for extended 
> tracking. 
>  
>  



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