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From "Sowmya Ramesh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FALCON-1063) Falcon CLI list entities operation throws NullPointerException
Date Thu, 05 Mar 2015 05:27:38 GMT

    [ https://issues.apache.org/jira/browse/FALCON-1063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14348176#comment-14348176
] 

Sowmya Ramesh commented on FALCON-1063:
---------------------------------------

[~pallavi.rao]: You may want to look at this https://issues.apache.org/jira/browse/FALCON-816.

> Falcon CLI list entities operation throws NullPointerException
> --------------------------------------------------------------
>
>                 Key: FALCON-1063
>                 URL: https://issues.apache.org/jira/browse/FALCON-1063
>             Project: Falcon
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.6, trunk
>            Reporter: Georgi Ivanov
>            Assignee: Pallavi Rao
>
> Using falcon v0.6 and doing list entities I receive NullPointerException. This happens
only on falcon installations that had existing entities and got upgraded to 0.6. I run:
>         falcon entity -type cluster -list
>         falcon entity -type process -list
> and I get this on console:
> Stacktrace:
> org.apache.falcon.client.FalconCLIException: Bad Request;null
> 	at org.apache.falcon.client.FalconCLIException.fromReponse(FalconCLIException.java:44)
> 	at org.apache.falcon.client.FalconClient.checkIfSuccessful(FalconClient.java:1172)
> 	at org.apache.falcon.client.FalconClient.sendListRequest(FalconClient.java:791)
> 	at org.apache.falcon.client.FalconClient.getEntityList(FalconClient.java:374)
> 	at org.apache.falcon.cli.FalconCLI.entityCommand(FalconCLI.java:412)
> 	at org.apache.falcon.cli.FalconCLI.run(FalconCLI.java:183)
> 	at org.apache.falcon.cli.FalconCLI.main(FalconCLI.java:133)
> The stacktrace on the server shows:
>         2015-03-03 04:14:06,462 ERROR - [683216314@qtp-1027439921-0:68e05a5c-95cb-46fb-a9f0-a7280e491dc2
falcon:GET//entities/list/process] ~ Failed to get entity list (AbstractEntityManager:532)
> java.lang.NullPointerException
>         at org.apache.falcon.resource.AbstractEntityManager.tryProxy(AbstractEntityManager.java:353)
>         at org.apache.falcon.resource.AbstractEntityManager.getEntities(AbstractEntityManager.java:583)
>         at org.apache.falcon.resource.AbstractEntityManager.getEntityList(AbstractEntityManager.java:530)
>         at org.apache.falcon.resource.proxy.SchedulableEntityManagerProxy.getEntityList(SchedulableEntityManagerProxy.java:405)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
>         at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
>         at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
>         at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
>         at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>         at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
>         at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>         at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>         at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
>         at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
>         at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
>         at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
>         at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
>         at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
>         at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>         at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
>         at org.apache.falcon.security.FalconAuthorizationFilter.doFilter(FalconAuthorizationFilter.java:102)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.falcon.security.FalconAuthenticationFilter$2.doFilter(FalconAuthenticationFilter.java:184)
>         at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:572)
>         at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:542)
>         at org.apache.falcon.security.FalconAuthenticationFilter.doFilter(FalconAuthenticationFilter.java:193)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.falcon.security.FalconAuditFilter.doFilter(FalconAuditFilter.java:65)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
>         at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>         at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>         at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:767)
>         at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
>         at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>         at org.mortbay.jetty.Server.handle(Server.java:326)
>         at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
>         at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
>         at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
>         at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>         at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>         at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
>         at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
>         2015-03-03 04:14:06,463 ERROR - [683216314@qtp-1027439921-0:68e05a5c-95cb-46fb-a9f0-a7280e491dc2
falcon:GET//entities/list/process] ~ Action failed: Bad Request
> Error: null (FalconWebException:68)
> This happened when upgrading falcon to 0.6. Cluster/process definitions do not contain
ACLs. Looking at AbstractEntityManager.java source the problem is obvious:
> 		
> 		private void tryProxy(Entity entity) throws IOException, FalconException {
>             final String aclOwner = entity.getACL().getOwner();
>             final String aclGroup = entity.getACL().getGroup();
> tryProxy method does not check if entity.getACL() returns null. There is a method called
decorateEntityWithACL which is used as a kludge before invoking tryProxy method and it populates
entities with some sample ACL and tryProxy does not throw null pointer exception. This is
done in submitInternal() and update() methods in AbstractEntityManager.java, which are called
when we call submit or update. However the list CLI operation calls getEntities() method,
which calls tryProxy() but does not "decorate" the entity with decorateEntityWithACL() and
hence we get NullPointerException. 
> This bug affects falcon UI as well. I checked trunk and it is not fixed there as well.
This bug won't manifest on entities created on falcon 0.6 because falcon "injects" ACLs into
the entity definition before saving it to Configuration Store if it does not have one already.



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