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https://issues.apache.org/jira/browse/KNOX-797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kevin Risden updated KNOX-797:
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Fix Version/s: (was: Future)
> Default Topology Feature Not Working
> ------------------------------------
>
> Key: KNOX-797
> URL: https://issues.apache.org/jira/browse/KNOX-797
> Project: Apache Knox
> Issue Type: Bug
> Components: Server
> Reporter: Larry McCay
> Assignee: Larry McCay
> Priority: Major
>
> From Mohammad Islam:
> I set "default.app.topology.name" in gateway-site.xml to "uber" (my default
> topology name).
> It worked fine if I gave the full URL. The command looks like this "curl
> http://<KNOX_GW_URL>/gateway/uber/webhdfs/v1/?op=GETHOMEDIRECTORY'".
>
> However, when I tried with command "curl
> http://<KNOX_GW_URL>/webhdfs/v1/?op=GETHOMEDIRECTORY'". I got the HTTP error
> code 500. I looked into gateway.log file and found quite a few error related
> to rewrite. The exact error messages are shown below:
> Error message
> {noformat}
> 2016-11-30 00:39:51,565 ERROR hadoop.gateway
> (UrlRewriteProcessor.java:rewrite(169)) - Failed to rewrite URL:
> http://<KNOX_GW_URL>/webhdfs/v1/?op=GETHOMEDIRECTORY, direction: IN via rule:
> WEBHDFS/webhdfs/inbound/namenode/root, status: FAILURE
> 2016-11-30 00:39:51,565 ERROR hadoop.gateway
> (UrlRewriteProcessor.java:rewrite(169)) - Failed to rewrite URL:
> http://<KNOX_GW_URL>/webhdfs/v1/?op=GETHOMEDIRECTORY, direction: IN via rule:
> WEBHDFS/webhdfs/inbound/namenode/root, status: FAILURE
> {noformat}
> After that, I modified the webhdfs/2.4.0/rewrite.xml by rewriting the
> following pattern and it worked for short URL but long URL faces the same
> issue.
> Original:
> {noformat}
> <rule dir="IN" name="WEBHDFS/webhdfs/inbound/namenode/root"
> pattern="*://*:*/**/webhdfs/{version}/?{**}">
> <rewrite template="{$serviceUrl[WEBHDFS]}/{version}/?{**}"/>
> </rule>
> {noformat}
> Modified :
> {noformat}
> <rule dir="IN" name="WEBHDFS/webhdfs/inbound/namenode/root"
> pattern="*://*:*/webhdfs/{version}/?{**}">
> <rewrite template="{$serviceUrl[WEBHDFS]}/{version}/?{**}"/>
> </rule>
> {noformat}
>
> Overall, the rewrite pattern may be the issue. We will need to support for
> both short and long URL. May be, we can add multiple rewrite rules for each
> route in service.xml.
> Is there any other cleaner way which may work for all cases such as webhdfs,
> yarn, hive, UIs etc?
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