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Posted to common-user@hadoop.apache.org by Fabio Miranda <fa...@live.com> on 2010/11/09 23:40:45 UTC

Browse filesystem web link exception

Hello,

Browsing a single setup instance on web port 50070, click on "browse filesystem" and got this error:

HTTP ERROR: 500n must be positive
RequestURI=/nn_browsedfscontent.jspCaused by:java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Random.java:250)
	at org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:540)
	at org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:508)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getRandomDatanode(FSNamesystem.java:3411)
	at org.apache.hadoop.hdfs.server.namenode.NamenodeJspHelper.redirectToRandomDataNode(NamenodeJspHelper.java:288)
	at org.apache.hadoop.hdfs.server.namenode.nn_005fbrowsedfscontent_jsp._jspService(nn_005fbrowsedfscontent_jsp.java:74)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1124)
	at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:767)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)

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what could be the cause ?

thanks,

Re: Browse filesystem web link exception

Posted by Hari Sreekumar <hs...@clickable.com>.

Never seen such an error before myself.. some more info would be helpful..
what is the output of jps? Are all daemons running?
What happens if you access HDFS from command line ($HADOOP_HOME/bin/hadoop
dfs -ls /)? Are you able to -put files into HDFS from command line?

hari

On Wed, Nov 10, 2010 at 4:10 AM, Fabio Miranda <fa...@live.com>wrote:

>
> Hello,
>
> Browsing a single setup instance on web port 50070, click on "browse
> filesystem" and got this error:
>
> HTTP ERROR: 500n must be positive
> RequestURI=/nn_browsedfscontent.jspCaused
> by:java.lang.IllegalArgumentException: n must be positive
>        at java.util.Random.nextInt(Random.java:250)
>        at
> org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:540)
>        at
> org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:508)
>        at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getRandomDatanode(FSNamesystem.java:3411)
>        at
> org.apache.hadoop.hdfs.server.namenode.NamenodeJspHelper.redirectToRandomDataNode(NamenodeJspHelper.java:288)
>        at
> org.apache.hadoop.hdfs.server.namenode.nn_005fbrowsedfscontent_jsp._jspService(nn_005fbrowsedfscontent_jsp.java:74)
>        at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>        at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1124)
>        at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:767)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
>        at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361)
>        at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>        at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>        at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>        at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>        at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>        at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>        at org.mortbay.jetty.Server.handle(Server.java:324)
>        at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>        at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>        at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>        at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
>
> Powered by Jetty://
>
> what could be the cause ?
>
> thanks,
>