[jira] [Commented] (KNOX-414) WebHDFS HA enablement in web.xml is sensitive to order of context listeners

["Sumit Gupta (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KNOX-414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14158378#comment-14158378 ] 

Sumit Gupta commented on KNOX-414:
----------------------------------

Added a test case in the patch that runs the scenario successfully. If the test is valid, this ticket should be deemed resolved/not-a-bug at this time.

> WebHDFS HA enablement in web.xml is sensitive to order of context listeners
> ---------------------------------------------------------------------------
>
>                 Key: KNOX-414
>                 URL: https://issues.apache.org/jira/browse/KNOX-414
>             Project: Apache Knox
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 0.5.0
>            Reporter: Sumit Gupta
>            Assignee: Sumit Gupta
>             Fix For: 0.5.0
>
>         Attachments: KNOX-414.patch
>
>
> Depending on how the web.xml gets generated, the HaServletContextListener may come after the UrlRewriteServletContextListener, in which case the provider is not available to the rewrite framework on initialization and HA functionality does not work.
> The web.xml config that works is:
>   <listener>
>     <listener-class>org.apache.hadoop.gateway.services.GatewayServicesContextListener</listener-class>
>   </listener>
>   <listener>
>     <listener-class>org.apache.hadoop.gateway.ha.provider.HaServletContextListener</listener-class>
>   </listener>
>   <context-param>
>     <param-name>haDescriptorLocation</param-name>
>     <param-value>/WEB-INF/ha.xml</param-value>
>   </context-param>
>   <listener>
>     <listener-class>org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteServletContextListener</listener-class>
>   </listener>
>   <context-param>
>     <param-name>rewriteDescriptorLocation</param-name>
>     <param-value>/WEB-INF/rewrite.xml</param-value>
>   </context-param>
> but there is no guarantee in place that the web.xml will be generated as such. 



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