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https://issues.apache.org/jira/browse/HADOOP-11754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382040#comment-14382040
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Sangjin Lee commented on HADOOP-11754:
--------------------------------------

cc [~vinodkv]

bq. Maybe we should avoid that at all, no default value for the property ? 
Indeed it should be explicitly prepared and configured.

Wouldn't that break users that were simply relying on the default value for 
this property in the secure mode? I'm not sure if that qualifies as not 
backward compatible, but does sound like there will be user impact if that 
change is made.

How about reverting this change for now (at least for branch-2)? This is a 
blocker for the 2.7 release. Is there a strong reason that HADOOP-10670 must be 
part of the 2.7 release? If not, it may not be a bad idea to revert this for 
now and revise the patch for a later release. Thoughts?

> RM fails to start in non-secure mode due to authentication filter failure
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-11754
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11754
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Sangjin Lee
>            Priority: Blocker
>         Attachments: HADOOP-11754-v1.patch, HADOOP-11754-v2.patch
>
>
> RM fails to start in the non-secure mode with the following exception:
> {noformat}
> 2015-03-25 22:02:42,526 WARN org.mortbay.log: failed RMAuthenticationFilter: 
> javax.servlet.ServletException: java.lang.RuntimeException: Could not read 
> signature secret file: /Users/sjlee/hadoop-http-auth-signature-secret
> 2015-03-25 22:02:42,526 WARN org.mortbay.log: Failed startup of context 
> org.mortbay.jetty.webapp.WebAppContext@6de50b08{/,jar:file:/Users/sjlee/hadoop-3.0.0-SNAPSHOT/share/hadoop/yarn/hadoop-yarn-common-3.0.0-SNAPSHOT.jar!/webapps/cluster}
> javax.servlet.ServletException: java.lang.RuntimeException: Could not read 
> signature secret file: /Users/sjlee/hadoop-http-auth-signature-secret
>       at 
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.initializeSecretProvider(AuthenticationFilter.java:266)
>       at 
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.init(AuthenticationFilter.java:225)
>       at 
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.init(DelegationTokenAuthenticationFilter.java:161)
>       at 
> org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter.init(RMAuthenticationFilter.java:53)
>       at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
>       at 
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
>       at 
> org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713)
>       at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
>       at 
> org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
>       at 
> org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
>       at 
> org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
>       at 
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
>       at 
> org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
>       at 
> org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
>       at 
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
>       at 
> org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
>       at org.mortbay.jetty.Server.doStart(Server.java:224)
>       at 
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
>       at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:773)
>       at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:274)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startWepApp(ResourceManager.java:974)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1074)
>       at 
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1208)
> Caused by: java.lang.RuntimeException: Could not read signature secret file: 
> /Users/sjlee/hadoop-http-auth-signature-secret
>       at 
> org.apache.hadoop.security.authentication.util.FileSignerSecretProvider.init(FileSignerSecretProvider.java:59)
>       at 
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.initializeSecretProvider(AuthenticationFilter.java:264)
>       ... 23 more
> ...
> 2015-03-25 22:02:42,538 FATAL 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error starting 
> ResourceManager
> org.apache.hadoop.yarn.webapp.WebAppException: Error starting http server
>       at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:279)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startWepApp(ResourceManager.java:974)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1074)
>       at 
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1208)
> Caused by: java.io.IOException: Problem in starting http server. Server 
> handlers failed
>       at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:785)
>       at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:274)
>       ... 4 more
> {noformat}
> This is likely a regression introduced by HADOOP-10670.



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