Hi Kevin, Please follow this URL
https://issues.apache.org/jira/browse/KNOX-563 On Fri, Jul 3, 2015 at 1:22 AM, Kevin Minder <[email protected]> wrote: > Anella or Larry, > Can one of you please file a jira about the NPE. Knox should certainly > handle that much more gracefully. That would be very much appreciated. > Please attache the topology file (e.g. Sandbox.xml) that resulted in this > error if possible. > Kevin. > > From: larry mccay <[email protected]> > Reply-To: "[email protected]" <[email protected]> > Date: Thursday, July 2, 2015 at 3:37 PM > To: "[email protected]" <[email protected]> > Subject: Re: Knox - Hostname was NOT found > > You are probably getting far enough now to be hitting errors due to > your lack of providers. Start with sandbox.xml config and start the ldap > server. See the apache docs for details. > On Jul 2, 2015 3:14 PM, "Aneela Saleem" <[email protected]> wrote: > >> Hey Larry, >> >> i got the following error >> >> <title>Error 500 Server Error</title> >> </head> >> <body><h2>HTTP ERROR 500</h2> >> <p>Problem accessing /gateway/cluster1/webhdfs/v1/. >> >> And the gateway.log file contains: >> >> 2015-07-03 00:09:04,560 ERROR hadoop.gateway >> (AbstractGatewayFilter.java:doFilter(69)) - Failed to execute filter: >> java.lang.NullPointerException >> 2015-07-03 00:09:04,560 ERROR hadoop.gateway >> (GatewayFilter.java:doFilter(135)) - Gateway processing failed: >> javax.servlet.ServletException: java.lang.NullPointerException >> javax.servlet.ServletException: java.lang.NullPointerException >> at >> org.apache.hadoop.gateway.filter.AbstractGatewayFilter.doFilter(AbstractGatewayFilter.java:70) >> at >> org.apache.hadoop.gateway.GatewayFilter$Holder.doFilter(GatewayFilter.java:315) >> at >> org.apache.hadoop.gateway.GatewayFilter$Chain.doFilter(GatewayFilter.java:215) >> at >> org.apache.hadoop.gateway.GatewayFilter.doFilter(GatewayFilter.java:129) >> at >> org.apache.hadoop.gateway.GatewayServlet.service(GatewayServlet.java:121) >> at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684) >> at >> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501) >> at >> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) >> at >> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) >> at >> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) >> at >> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) >> at >> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428) >> at >> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) >> at >> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) >> at >> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) >> at >> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) >> at >> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) >> at org.eclipse.jetty.server.Server.handle(Server.java:370) >> at >> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494) >> at >> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971) >> at >> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033) >> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644) >> at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) >> at >> org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) >> at org.eclipse.jetty.io.nio.SslConnection.handle(SslConnection.java:196) >> at >> org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:667) >> at >> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) >> at >> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) >> at >> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) >> at java.lang.Thread.run(Thread.java:745) >> Caused by: java.lang.NullPointerException >> >> >> >> >> On Fri, Jul 3, 2015 at 12:07 AM, larry mccay <[email protected]> >> wrote: >> >>> Try lower case webhdfs as in: >>> >>> 'https://localhost:8443/gateway/cluster1/webhdfs/v1/?op=GETHOMEDIRECTORY' >>> >>> >>> On Thu, Jul 2, 2015 at 2:59 PM, Aneela Saleem <[email protected]> >>> wrote: >>> >>>> Dear larry, >>>> >>>> The gateway.log file contains the following logs: >>>> >>>> 2015-07-02 23:43:16,391 INFO hadoop.gateway >>>> (GatewayServer.java:handleCreateDeployment(427)) - Deploying topology >>>> cluster1 to >>>> /home/hduser/knox-0.6.0/bin/../data/deployments/cluster1.war.14e501479a0 >>>> 2015-07-02 23:43:16,392 INFO hadoop.gateway >>>> (DeploymentFactory.java:createDeployment(82)) - Configured services >>>> directory is /home/hduser/knox-0.6.0/bin/../data/services >>>> 2015-07-02 23:43:16,428 INFO hadoop.gateway >>>> (DefaultGatewayServices.java:initializeContribution(180)) - Credential >>>> store found for the cluster: cluster1 - no need to create one. >>>> 2015-07-02 23:44:40,453 WARN hadoop.gateway >>>> (GatewayFilter.java:doFilter(152)) - Failed to match path >>>> /WEBHDFS/v1?op=GETHOMEDIRECTORY >>>> 2015-07-02 23:44:51,722 WARN hadoop.gateway >>>> (GatewayFilter.java:doFilter(152)) - Failed to match path >>>> /WEBHDFS/v1?op=GETHOMEDIRECTORY >>>> 2015-07-02 23:45:30,783 WARN hadoop.gateway >>>> (GatewayFilter.java:doFilter(152)) - Failed to match path >>>> /WEBHDFS/v1?op=GETHOMEDIRECTORY >>>> >>>> And i'm just a beginner. I'm trying to configure Knox Topology to >>>> connect to HDFS, using default services provided. And i'm validating >>>> connection to services. >>>> >>>> On Thu, Jul 2, 2015 at 11:50 PM, larry mccay <[email protected]> >>>> wrote: >>>> >>>>> Please check the {GATEWAY_HOME}/logs/gateway.log file for errors >>>>> during deployment. >>>>> >>>>> I notice that you have no providers described in cluster1.xml - this >>>>> may be the root of your problem. >>>>> I don't think that I have ever even tried that. >>>>> >>>>> What are you expecting the authentication behavior to be there? >>>>> >>>>> >>>>> On Thu, Jul 2, 2015 at 2:27 PM, Aneela Saleem <[email protected]> >>>>> wrote: >>>>> >>>>>> ${KNOX_HOME}/knox/conf/topologies has the following contents: >>>>>> >>>>>> admin.xml cluster1.xml README sandbox.xml >>>>>> >>>>>> cluster1.xml is the topology descriptor file created by me. >>>>>> >>>>>> cluster1.xml has following contents: >>>>>> >>>>>> <topology> >>>>>> <gateway> >>>>>> </gateway> >>>>>> <service> >>>>>> <role>NAMENODE</role> >>>>>> <url>hdfs:// namenode-host :8020</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>JOBTRACKER</role> >>>>>> <url>rpc:// jobtracker-host :8050</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>RESOURCEMANAGER</role> >>>>>> <url>http://red3:8088/ws</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>WEBHDFS</role> >>>>>> <url>http://localhost:50070/webhdfs</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>WEBHCAT</role> >>>>>> <url>http://webcat-host :50111/templeton</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>OOZIE</role> >>>>>> <url>http://oozie-host :11000/oozie</url> >>>>>> </service> >>>>>> >>>>>> <service> >>>>>> <role>WEBHBASE</role> >>>>>> <url>http://webhbase-host :60080</url> >>>>>> </service> >>>>>> </topology> >>>>>> >>>>>> >>>>>> admin.xml has default contents. I did not make any changes. >>>>>> >>>>>> >>>>>> >>>>>> On Thu, Jul 2, 2015 at 11:15 PM, Steve Howard <[email protected] >>>>>> > wrote: >>>>>> >>>>>>> To be clear, the error isn't hostname not found (that just means it >>>>>>> wasn't in the DNS cache on your computer), it's that the URL can't be >>>>>>> found >>>>>>> by the knox server. >>>>>>> >>>>>>> Can you post the contents of your >>>>>>> ${KNOX_HOME}/knox/conf/topologies directory? >>>>>>> >>>>>>> On Thu, Jul 2, 2015 at 1:50 PM, Aneela Saleem < >>>>>>> [email protected]> wrote: >>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> I'm trying to connect to HDFS through Knox gateway. I run the >>>>>>>> following command: >>>>>>>> >>>>>>>> curl -vk >>>>>>>> https://localhost:8443/gateway/cluster1/WEBHDFS/v1?op=GETHOMEDIRECTORY >>>>>>>> >>>>>>>> when i run this command i get the following error: >>>>>>>> >>>>>>>> * Hostname was NOT found in DNS cache >>>>>>>> * Trying 127.0.0.1... >>>>>>>> * Connected to localhost (127.0.0.1) port 8443 (#0) >>>>>>>> * successfully set certificate verify locations: >>>>>>>> * CAfile: none >>>>>>>> CApath: /etc/ssl/certs >>>>>>>> * SSLv3, TLS handshake, Client hello (1): >>>>>>>> * SSLv3, TLS handshake, Server hello (2): >>>>>>>> * SSLv3, TLS handshake, CERT (11): >>>>>>>> * SSLv3, TLS handshake, Server key exchange (12): >>>>>>>> * SSLv3, TLS handshake, Server finished (14): >>>>>>>> * SSLv3, TLS handshake, Client key exchange (16): >>>>>>>> * SSLv3, TLS change cipher, Client hello (1): >>>>>>>> * SSLv3, TLS handshake, Finished (20): >>>>>>>> * SSLv3, TLS change cipher, Client hello (1): >>>>>>>> * SSLv3, TLS handshake, Finished (20): >>>>>>>> * SSL connection using ECDHE-RSA-DES-CBC3-SHA >>>>>>>> * Server certificate: >>>>>>>> * subject: C=US; ST=Test; L=Test; O=Hadoop; OU=Test; CN=localhost >>>>>>>> * start date: 2015-06-29 21:39:18 GMT >>>>>>>> * expire date: 2016-06-28 21:39:18 GMT >>>>>>>> * issuer: C=US; ST=Test; L=Test; O=Hadoop; OU=Test; CN=localhost >>>>>>>> * SSL certificate verify result: self signed certificate (18), >>>>>>>> continuing anyway. >>>>>>>> > GET /gateway/cluster1/WEBHDFS/v1?op=GETHOMEDIRECTORY HTTP/1.1 >>>>>>>> > User-Agent: curl/7.35.0 >>>>>>>> > Host: localhost:8443 >>>>>>>> > Accept: */* >>>>>>>> > >>>>>>>> < HTTP/1.1 404 Not Found >>>>>>>> < Content-Length: 0 >>>>>>>> * Server Jetty(8.1.14.v20131031) is not blacklisted >>>>>>>> < Server: Jetty(8.1.14.v20131031) >>>>>>>> < >>>>>>>> * Connection #0 to host localhost left intact >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Can anyone please help me in tackling this issue? >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >>
