[jira] [Created] (KNOX-2531) Kill Application button in YARN does not work through KNOX

["Iain Buclaw (Jira)" <ji...@apache.org>]

Iain Buclaw created KNOX-2531:
---------------------------------

             Summary: Kill Application button in YARN does not work through KNOX
                 Key: KNOX-2531
                 URL: https://issues.apache.org/jira/browse/KNOX-2531
             Project: Apache Knox
          Issue Type: Bug
    Affects Versions: 1.4.0
            Reporter: Iain Buclaw


I think the fix is similar to KNOX-2456.

The Kill Application button

!image-2021-01-21-11-35-21-096.png|id=cp-img!

Ends up being rewritten as: [https://host:443/gateway/proxy/yarnhttps:/host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state|https://host/gateway/proxy/yarnhttps:/host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state]

Debug logs show:
{code:java}
2021-01-21 10:20:05,069 DEBUG knox.gateway (UrlRewriteProcessor.java:rewrite(164)) - Rewrote URL: /ws/v1/cluster/apps/application, direction: OUT via explicit rule: YARNUI/yarn/outbound/apps/cluster1 to URL: https://host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application2021-01-21 10:20:05,070 DEBUG knox.gateway (UrlRewriteProcessor.java:rewrite(164)) - Rewrote URL: /ws/v1/cluster/apps/application_1611223368889_0003/state', contentType: 'application/json', data: '{"state":"KILLED"}', dataType: 'json' }).done(function(data){ setTimeout(function(){ location.href = '/cluster/app/application_1611223368889_0003'; }, 1000); }).fail(function(data){ console.log(data); }); }}, direction: OUT via explicit rule: YARNUI/yarn/outbound/ws1 to URL: https://host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state', contentType: 'application/json', data: '{"state":"KILLED"}', dataType: 'json' }).done(function(data){ setTimeout(function(){ location.href = '/cluster/app/application_1611223368889_0003'; }, 1000); }).fail(function(data){ console.log(data); }); }}
                                                                                                                                                  
2021-01-21 10:20:05,071 TRACE knox.gateway (UrlRewriteProcessor.java:rewrite(167)) - Failed to rewrite URL: https://host:443/gateway/proxy/yarnhttps:/host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state, direction: OUT via rule: YARNUI/yarn/outbound/node2, status: FAILURE
{code}
This suggests that the original URL path is rewritten twice.

I suspect it is these two filter rules that's doing the double rewrite.
{code:java}
<filter name="YARNUI/yarn/outbound/filter/cluster">
    <content type="*/html">
        <apply path="(https?://[^/':,]+:[\d]+)?/ws/v1/cluster/apps/application" rule="YARNUI/yarn/outbound/apps/cluster1"/>
        <apply path="/ws/v1/.*" rule="YARNUI/yarn/outbound/ws1"/>
        <!-- snip -->
    </content>
</filter>
{code}
Originally, it is: /ws/v1/cluster/apps/application_1611223368889_0003/state

The first apply path rule matches and rewrites it to: [https://host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state|https://host/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state]

The second apply rule also matches and rewrites it to: [https://host:443/gateway/proxy/yarnhttps:/host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state|https://host/gateway/proxy/yarnhttps:/host:443/gateway/proxy/yarn/ws/v1/cluster/apps/application_1611223368889_0003/state]

The broken link is then passed through the rewrite rule processor again, doesn't match anything, so a FAILURE logline is written.



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