No. The topology should fail to deploy worth appropriate error message though. On Jul 19, 2015 7:44 PM, "Kristopher Kane (JIRA)" <[email protected]> wrote:
> > [ > https://issues.apache.org/jira/browse/KNOX-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632976#comment-14632976 > ] > > Kristopher Kane commented on KNOX-564: > -------------------------------------- > > Should the gateway fail to start if there is a failure in any of the > configured providers? > > > NPE for Topology with no Providers Confgured > > -------------------------------------------- > > > > Key: KNOX-564 > > URL: https://issues.apache.org/jira/browse/KNOX-564 > > Project: Apache Knox > > Issue Type: Bug > > Reporter: Larry McCay > > Assignee: Larry McCay > > Fix For: 0.7.0 > > > > > > Deploying a topology with no providers described in the gateway element > succeeds. However, when attempting to access webhdfs through Knox for this > topology we get a NPE: > > {code} > > <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 > > {code} > > As long as there are no default providers for each type, we should fail > to deploy the topology with appropriate logging. > > > > -- > This message was sent by Atlassian JIRA > (v6.3.4#6332) >
