Trouble with Java on Ubuntu
I was hoping to have a nice post here about clustering a grails app using three ubuntu 8.04 LTS boxes (using centOS now), nginx, memcached and grails. But all did not go well…
I got the first ubuntu box pretty much set up thanks to a nice tutorial from nanoTux. Of course I skipped the http server portion as well as the PHP and got Java installed. No real hassles there.
However, when I got the app deployed, sometimes it would respond and sometimes it wouldn’t. I couldn’t figure it out. The app itself started up just fine judging from the logs, but I would get no response, like it was hung. Stop, restart, same thing. Then a couple minutes later it would come alive. Then go away.
I couldn’t figure it out. I’m no linux guru and this was my first crack at using Ubuntu so maybe I didn’t have something set right, but the on and off again behavior was certainly odd. Maybe it was the iptables setup or some other networking setting? Don’t know. After spending quite some time on it, I had to dump the idea and get the app running again on a single machine back on centos.
I hope to give this another shot sometime soon. Any suggestions out there?
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10/14/09 04:42pm
webmogul: Trouble with Java on Ubuntu http://tinyurl.com/bffmru 01/22/09 04:58am
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Comments
that’s weird. I’ve got the sun-java5-* packages installed on Ubuntu 8.10 [server] (Sunfire v20z so it’s AMD 64-bit) and it works fine with the SunOne Webserver 7.0. I deploy webapps to it all the time that I’m developing for ${work} and haven’t had any problems with it.
yea I’m not sure what was going on. I know it can work on Ubuntu as my day job used it for quite some time before switching to gentoo. I’m going to take another shot at it though.
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Under Ubuntu (Debian based) there are gazilions of alternatives for java implementations. It might happen that you are not using the sun machine, but something else that doesn’t provide all you need (or an old version of the sun implementation).
Although a bit old, have a look at: http://linuxhelp.blogspot.com/2006/09/concise-guide-
to-update-alternatives.html
It is not uncommon for the default to be something else (do a java/javac -version to see what is really running). In most cases you will want to get rid off all implementations and just use the sun one (the sun-java6- packages).