Some Java program is hard to run remotely via ssh tunnel, but I do not know the detail either.
On Mon, Jan 18, 2010 at 5:57 AM, Vladimir Klimontovich <[email protected]> wrote: > Maybe, hadoop running MR jobs using different user? For example, if you > followed installation instructions > from official site or used rpm/deb packages hadoop using "hadoop" user to run > jobs. And you probably using different user > for running your test program. > > On Jan 18, 2010, at 12:41 AM, Tarandeep Singh wrote: > >> Hi, >> >> I am running a MR job that requires usage of some java.awt.* classes, that >> can't be run in headless mode. >> >> Right now, I am running Hadoop in a single node cluster (my laptop) which >> has X11 server running. I have set up my ssh server and client to do X11 >> forwarding. >> >> I ran the following java program to ensure that X11 forwarding is working- >> >> public class Test >> throws Exception >> { >> public static void main( String[] args) >> { >> Process p = runtime.getRuntime( ).exec( "/usr/bin/xterm"); >> p.waitFor( ); >> } >> } >> >> I ran it as- >> ssh localhost "java Test" >> and it worked confirming that X11 forwarding is working over SSH. >> >> However, when I run a Map Reduce program that uses java.awt.* classes >> (trying to create an object that extends Frame), I keep getting this error- >> >> java.lang.InternalError- Can't connect to X11 window server using >> 'localhost:10.0' as the value of the DISPLAY variable >> >> I printed the value of DISPLAY variable- >> >> echo $DISPLAY >> :0.0 >> ssh localhost >> echo $DISPLAY >> localhost:10.0 >> >> I understand this is more of a SSH and X11 related issue, but X11 forwarding >> is working over SSH in my standalone programs, but not in MR program. That's >> why I am posting the problem here. >> >> Any help is greatly appreciated. >> >> Thanks, >> Tarandeep > > --- > Vladimir Klimontovich, > skype: klimontovich > GoogleTalk/Jabber: [email protected] > Cell phone: +7926 890 2349 > > -- Wang Xu Ted Turner - "Sports is like a war without the killing." - http://www.brainyquote.com/quotes/authors/t/ted_turner.html
