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From "Pankaj Kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13735) race condition for web interface during master start up
Date Thu, 21 May 2015 10:19:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14554053#comment-14554053
] 

Pankaj Kumar commented on HBASE-13735:
--------------------------------------

Hi [~busbey], are you planing to work on this issue? Shall I work on this?

> race condition for web interface during master start up
> -------------------------------------------------------
>
>                 Key: HBASE-13735
>                 URL: https://issues.apache.org/jira/browse/HBASE-13735
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 1.0.1
>            Reporter: Sean Busbey
>            Priority: Minor
>
> loaded the master web page while the master was starting up and managed to hit a HTTP
500 with a NPE.
> {code}
> java.lang.NullPointerException
> 	at org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.parse(MasterAddressTracker.java:236)
> 	at org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.getMasterInfoPort(MasterAddressTracker.java:86)
> 	at org.apache.hadoop.hbase.tmpl.master.BackupMasterStatusTmplImpl.renderNoFlush(BackupMasterStatusTmplImpl.java:53)
> 	at org.apache.hadoop.hbase.tmpl.master.BackupMasterStatusTmpl.renderNoFlush(BackupMasterStatusTmpl.java:113)
> 	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.renderNoFlush(MasterStatusTmplImpl.java:309)
> 	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.renderNoFlush(MasterStatusTmpl.java:373)
> 	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.render(MasterStatusTmpl.java:364)
> 	at org.apache.hadoop.hbase.master.MasterStatusServlet.doGet(MasterStatusServlet.java:81)
> 	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$CachedChain.doFilter(ServletHandler.java:1221)
> 	at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:113)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> 	at org.apache.hadoop.hbase.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1351)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> 	at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> 	at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
> 	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)
> {code}



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