Hi,
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
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: FAILURE2016-11-30 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
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:
<rule dir="IN" name="WEBHDFS/webhdfs/inbound/namenode/root"
pattern="*://*:*/**/webhdfs/{version}/?{**}"> <rewrite
template="{$serviceUrl[WEBHDFS]}/{version}/?{**}"/> </rule>
Modified :
<rule dir="IN" name="WEBHDFS/webhdfs/inbound/namenode/root"
pattern="*://*:*/webhdfs/{version}/?{**}"> <rewrite
template="{$serviceUrl[WEBHDFS]}/{version}/?{**}"/> </rule>
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?
Regards,Mohammad
