[jira] [Commented] (KNOX-1023) nodemanager log links for a running job not working through YARNUI

["Larry McCay (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KNOX-1023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16467779#comment-16467779 ] 

Larry McCay commented on KNOX-1023:
-----------------------------------

[~hariharan022] - I am going to move this out to 1.2.0 unless we can get an updated patch for this. I've tried to resolve it myself but I don't want to make assumptions that break things.

> nodemanager log links for a running job not working through YARNUI
> ------------------------------------------------------------------
>
>                 Key: KNOX-1023
>                 URL: https://issues.apache.org/jira/browse/KNOX-1023
>             Project: Apache Knox
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: vaibhav beriwala
>            Priority: Major
>             Fix For: 1.1.0
>
>         Attachments: KNOX-1023.patch
>
>
> When nodemanager links are accessed through YARNUI service, it requires the host and port to be appended in the URI , something like: 
> {code:java}
> https://host:8443/gateway/sandbox/yarn/nodemanager/node/containerlogs/container_e02_1498543212255_0001_01_000001/user?host=nm-host&port=8042
> {code}
> When I'm coming from the RM page, this link is rendered as an absolute one, so the rewrite rule works fine and appends the host and port. However, when I'm on the NM page itself, the URLs are not absolute(the URL's on NM page are relative), so a different rewrite rule applies:
> {code:java}
> DEBUG hadoop.gateway (UrlRewriteProcessor.java:rewrite(164)) - Rewrote URL: /node/containerlogs/container_e01_1498485266952_0006_01_000001/hiyer qa3july/stderr/?start=-4096, direction: OUT via implicit rule: YARNUI/yarn/outbound/node to URL: https://host:8443/gateway/sandbox/yarn/node/containerlogs/container_e01_1498485266952_0006_01_000001/user/stderr
> {code}
> As you can see, this link does not contain the host=nm-host&port=8042 at the end of query string, so it does not work. This affects log links for running tasks, and links for the nodemanager itself.
> So, the links on NM page of type 
> {code:java}
> href=/syslog
> {code}
>  gets transformed to 
> {code:java}
> https://host:8443/gateway/sandbox/yarn/nodemanager/node/containerlogs/container_e02_1498543212255_0001_01_000001/user/syslog
> {code}
> whereas it should have been transformed to 
> {code:java}
> https://host:8443/gateway/sandbox/yarn/nodemanager/node/containerlogs/container_e02_1498543212255_0001_01_000001/user/syslog?host=nm-host&port=8042
> {code}
> One possible solution I could think of is appending the query string of the *current* page to the link, but I couldn't see how to do that in a rewrite rule.
> Also, if you can provide some code pointers I may look into it. :)



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