JDK-6927617 : Java Web Start application hosted on server farm shows repeated download of jar files
Type:Enhancement
Component:deploy
Sub-Component:webstart
Affected Version:6u18,6u21
Priority:P4
Status:Closed
Resolution:Future Project
OS:windows_xp
CPU:x86
Submitted:2010-02-18
Updated:2011-12-15
Resolved:2010-08-23
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed. Resolved: Release in which this issue/RFE has been resolved. Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
Java Web Start application hosted on a server farm shows repeated
download of jar files, although the application was entirely left
unchanged.
Comments
EVALUATION
This is not infact a bug. Java Webstart is currently designed to re-download if the IP changes. Hence converting this into an RFE.
28-07-2010
EVALUATION
It is recommended to try using <update check="background">
This will indicate launching the application from the cache while downloading continues.
More information can be found here: http://download.oracle.com/docs/cd/E17409_01/javase/6/docs/technotes/guides/javaws/developersguide/syntax.html#update
Having said that, it may still not resolve customer's issue, since as per the current design of webstart, cache entry will be invalidated if the IP address is different and a re-download is initiated. This ensures that the client does not connect to any machine other than the one from where the application was downloaded in the first place.