doubts:

1. What is seriaVersionUID?
2. Why do we need serializable interface?
3. What is point of using servlets?
4. what does singleton class means?

http://forums.sun.com/thread.jspa?threadID=489302

helped me a lot in fixing port issue of RMI on different node

after port in use error ... a new error has come..
this is the one

Remote Exception: java.rmi.ConnectException: Connection refused to host: 127.0.1.1; nested exception is:
java.net.ConnectException: Connection refused

for port one still not fixed.
but tcpdump or netstat -lnp or ps -eaf can be used to see the various results...

anyways lets fix this error ...
automatic fix... when changed port back to 1099

read it sometime..
To see every process on the system using standard syntax:
ps -e
ps -ef
ps -eF
ps -ely

To see every process on the system using BSD syntax:
ps ax
ps axu

To print a process tree:
ps -ejH
ps axjf

To get info about threads:
ps -eLf
ps axms

To get security info:
ps -eo euser,ruser,suser,fuser,f,comm,label
ps axZ
ps -eM

To see every process running as root (real & effective ID) in user format:
ps -U root -u root u

To see every process with a user-defined format:
ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm
ps axo stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm
ps -eopid,tt,user,fname,tmout,f,wchan

Print only the process IDs of syslogd:
ps -C syslogd -o pid=

Print only the name of PID 42:
ps -p 42 -o comm=

http://forums.sun.com/forum.jspa?forumID=58&start=30

follow this.. it will help

Collection class on hashmap with serializable can cause problem...
just keep track and make sure of this thing...


1. locateRegistry.createRegistry(port no)
man... saurabh jain you need to look at bigger picture always...
be methodological in fixing issues.
be concentrative


This fixed my RMI unmarshalling error...

Copied from somewhere.. Not mine

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