Launching a JNLP file from IE works inconsistently

Question

Am trying to launch jnlp file from IE. The jnlp file is created via a JSP page by setting the appropriate content type. Problem is it works inconsistently. It gives an error when launching with details as mentioned below:
If i keep trying it works finally .... why is this inconsistent behaviour!. ... please help.
Thanks in advance.
====================================================
Exception:
CouldNotLoadArgumentException[ Could not load file/URL specified: C:\Documents and Settings\roopak.gupta\Local Settings\Temporary Internet Files\Content.IE5\4PMNG163\launchAdmin[1].jnlp]
at com.sun.javaws.Main.main(Unknown Source)
Wrapped Exception
java.io.FileNotFoundException: C:\Documents and Settings\roopak.gupta\Local Settings\Temporary Internet Files\Content.IE5\4PMNG163\launchAdmin[1].jnlp (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.Main.main(Unknown Source)

Answer 1

Am trying to launch jnlp file from IE. The jnlp file
is created via a JSP page by setting the appropriate
content type. Problem is it works inconsistently. It
gives an error when launching with details as
mentioned below:
If i keep trying it works finally .... why is this
inconsistent behaviour!. ... please help.
Thanks in advance.
====================================================
Exception:
CouldNotLoadArgumentException[ Could not load
file/URL specified: C:\Documents and
Settings\roopak.gupta\Local Settings\Temporary
Internet
Files\Content.IE5\4PMNG163\launchAdmin[1].jnlp]
at com.sun.javaws.Main.main(Unknown
main(Unknown Source)
Wrapped Exception
java.io.FileNotFoundException: C:\Documents and
Settings\roopak.gupta\Local Settings\Temporary
Internet
Files\Content.IE5\4PMNG163\launchAdmin[1].jnlp (The
system cannot find the file specified)
at java.io.FileInputStream.open(Native
.open(Native Method)
at java.io.FileInputStream.<init>(Unknown
nit>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown
nit>(Unknown Source)
I have seen this happen for two reasons.
One reason is that a vary header is sent by the Web server. This can happen for a number of reasons. Lets say you are dynimically generating your JNLP file with PHP, and you call session_start() in the jnlp this will send some headers which cause IE not to properly cache the JNLP file. You probably want to send a send a few other headers in the jsp which generates your jnlp.
However since this behavior is happening some times and some times not. My guess is that your IE cache is close to full or need so be increased in size.
See
http://forum.java.sun.com/thread.jspa?forumID=38&messageID=181208&threa dID=71283
and http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq.html#220
session tracking sends no cache directive to i.e. which hoses it
Let me know if this solved your problem,
R
S