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https://issues.apache.org/jira/browse/HBASE-6607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438059#comment-13438059
]
Jimmy Xiang commented on HBASE-6607:
------------------------------------
That will be great. One more thing is that the server side is better not to
throw NPE.
If server side is not fully initialized, it is still better to show something
we have so far, so that we can tell from the ui what's going on in the server
side.
> NullPointerException when accessing master web ui while master is initializing
> ------------------------------------------------------------------------------
>
> Key: HBASE-6607
> URL: https://issues.apache.org/jira/browse/HBASE-6607
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.96.0
> Reporter: Jimmy Xiang
> Priority: Trivial
> Labels: noob
>
> Probably I tried to check the master web ui too soon. I got some internal
> error page. In the master log, there is such exception:
> {noformat}
> 2012-08-17 16:06:25,146 ERROR org.mortbay.log: /master-status
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.HMaster.isCatalogJanitorEnabled(HMaster.java:1213)
> at
> org.apache.hadoop.hbase.master.MasterStatusServlet.doGet(MasterStatusServlet.java:72)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 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$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:835)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
> at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$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.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> {noformat}
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