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Matt Holloway
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I'm not sure if this is the forum for this or not. We are running several applications on our WAN that use JVM, however, each is compliant with a differnt JVM (ranging from 1.3.6 to 1.4.2.01). The problem is that the newest version (1.4.2.01 I believe) is not backwards compatible, so when we upgrade to this version, other Apps balk, and will not run. Compounded is the problem that MS created by creating their own JVM, then reversing and telling us to use 1.4.2.01 from Sun.
Anybody else encounter problems with JVM compatiblity issues? I can alter my current JVM in my control panel (Win 2000) for each different app, but for our everyday clients, that is not an option, we need a simple solution.
Thanks
 
Ernest Friedman-Hill
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Sun's JVMs are indeed quite backward compatible. There are a few tiny dark corners you can get yourself into, but virtually all compatibility problems go the other way -- i.e., new apps can't run on old JVMs because they use new features.
Microsoft's JVM is so old that you can't expect anything to run on it; and was never compliant in the first place.
Can you tell us something about the compatibility problems? Maybe we can help.
P.S. JDK 1.3 revisions ended with some patchlevel of 1.3.1 -- there was no 1.3.6.
 
Matt Holloway
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Thanks for the reply. Currently, we are using MS Project 2002 which didn't work with our JVM version 1.4.1.x, and HP OpenView which was using 1.4.1.x. Now we have upgraded to 1.4.2.01, so they both work, but two new products have entered our environment. IXOS (Document Management) has told us that their product will not work with 1.4.2.x, but will with 1.3.x versions of JVM. I've been somewhat peripheral to this issue, but somebody asked me this morning, and my response was 1.4.2.x would be downward compatible so all should be fine. They told me that IXOS does not work with that version... I took their word on it, but perhaps I need to dig a little more.
I wondered if there was others with this problem, or if my colleague is mistaken. I'll have to verify myself.
Again, thanks for the feedback.
 
Marilyn de Queiroz
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I've run into one incompatability between v1.3 and v1.4. However, as Ernest said, I think you would need to be a little more specific in specificing what is incompatable before anyone would be able to help you.
 
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