Using PuTTY to start OC4J -- X connection "gotcha"

Question

Hi,
I came across this last night to my own surprise.
I use PuTTY to ssh into servers here, and to do the OBIEE installation in graphical mode I also installed Cygwin X window manager on my MS Windows laptop. I then went into PuTTY settings and enabled X11 packet forwarding to get the gui from linux appear in my Microsoft Windows. Once I installed OBIEE, I kept the PuTTY settings unchanged.
On the linux server, I issued the following command to start OC4J:
nohup ./oc4j -start > nohup_oc4j_start.out &
What I discovered was that as soon as I stopped Cygwin on my Windows laptop the OC4J process on the linux server died with the following message at the end of the log file:
"X connection to localhost:10.0 broken (explicit kill or server shutdown)."
I then tried to use PuTTY alone to ssh into the linux server and start OC4J without Cygwin running on my laptop, but the result was the same.
The solution was to disable X11 forwarding in PuTTY temporarily then ssh into the server and start OC4J. Then I could turn off my laptop and go home without affecting OC4J on the server.
Thought this info might be useful to someone.
-sb

Answer 1

Thanks sb.
I also noticed the same reaction when trying to start and OMB shell through Putty.
When executing $OWB_HOME/owb/bin/unix/OMBPlus.sh I got the "X connection to localhost broken" message.
I then did and "su - oracle" and tried the same thing and it worked. I initially thought it was user rights issue. Then I came across this thread and I setup another connection in Putty but with no "X11 forwarding" and all worked like magic.
Sometimes one finds the answers in the most unlikely places.