Sumit Gupta created KNOX-414:
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Summary: 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
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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