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https://issues.apache.org/jira/browse/HDFS-15380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ayush Saxena updated HDFS-15380:
--------------------------------
    Fix Version/s: 3.4.0
       Resolution: Fixed
           Status: Resolved  (was: Patch Available)

> RBF: Could not fetch real remote IP in RouterWebHdfsMethods
> -----------------------------------------------------------
>
>                 Key: HDFS-15380
>                 URL: https://issues.apache.org/jira/browse/HDFS-15380
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 3.1.0
>            Reporter: tomscut
>            Assignee: tomscut
>            Priority: Major
>              Labels: router, webhdfs
>             Fix For: 3.4.0
>
>         Attachments: HDFS-15380.001.patch
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> We plan to add audit log for hdfs router, then we fetch remote ip via 
> Server.getRemoteIp(), but the result is "localhost/127.0.0.1".
>   
>  "REMOTE_ADDRESS" in RouterWebHdfsMethods.java is a ThreadLocal field, 
> setting in construction method RouterWebHdfsMethods() and init(). When we 
> call method Server.getRemoteIp() to fetch remote ip, the thread would be 
> changed, so the ThreadLocal field "REMOTE_ADDRESS" is null, and would be 
> passed to "localhost/127.0.0.1" via InetAddress.getByName().
>   
>  So we can change this field "REMOTE_ADDRESS" to a String value, just like 
> NamenodeWebHdfsMethods does.
>   
> I printed thread name and the value of "REMOTE_ADDRESS" in log, the log is 
> shown below:
> {code:java}
> 2020-05-27 19:15:18,797 INFO  router.RouterWebHdfsMethods 
> (RouterWebHdfsMethods.java:<init>(138)) - RouterWebHdfsMethods 
> REMOTE_ADDRESS: 14.39.39.28, current thread: qtp476579021-1090
> 2020-05-27 19:15:18,827 INFO  router.RouterWebHdfsMethods 
> (RouterWebHdfsMethods.java:init(150)) - init REMOTE_ADDRESS: 14.39.39.28, 
> current thread: qtp476579021-1090
> 2020-05-27 19:15:18,836 INFO  router.RouterWebHdfsMethods 
> (RouterWebHdfsMethods.java:getRemoteAddr(170)) - getRemoteAddr 
> REMOTE_ADDRESS: null, current thread: IPC Server handler 75 on 8888
> 2020-05-27 19:15:18,837 INFO  router.RouterWebHdfsMethods 
> (RouterWebHdfsMethods.java:getRemoteAddr(170)) - getRemoteAddr 
> REMOTE_ADDRESS: null, current thread: IPC Server handler 75 on 8888
> 2020-05-27 19:15:18,883 INFO  router.RouterWebHdfsMethods 
> (RouterWebHdfsMethods.java:reset(164)) - reset REMOTE_ADDRESS: null, current 
> thread: IPC Server handler 75 on 8888
> {code}



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