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RE: [wtp-dev] Request PMC approval for 139863 for 1.0.3

Title: Message

A bit more background on this issue...

 

We rely on being able to accurately determine the version of the java vm of the server runtime in order to control which versions of the java facet the user should be able to select. For instance if the VM version is 1.4, the user can select java facet version 1.3 and 1.4. Unfortunately, there are cases (as of yet not understood) where JDT fails to determine the VM version. This behavior has been seen on Mac OS (not sure which VM) and it has recently started showing up sporadically with BEA’s JRockit VM. The current code arbitrarily assigns version 1.4 to the VM when the version cannot be determined. The problem with that is that if the actual version happens to be 5.0 the user cannot pick version 5.0 of java facet (and hence the corresponding java compiler level). There is no workaround. It is going to take some time to understand exactly why version detection fails and to forward that information to the JDT team. In the meantime we can make this problem less severe by using the highest known VM version (5.0 in the case of 1.0.x) instead of 1.4. This approach places the least restriction on the user. With this approach, the user will always be able to compensate for the VM version detection problem by picking the correct version of the java facet on the facets selection screen. While not perfect, it’s much better than what we currently have and I highly recommend that we make this fix for 1.0.3.

 

Does anyone have any comments on this?

 

- Konstantin

 

 


From: wtp-dev-bounces@xxxxxxxxxxx [mailto:wtp-dev-bounces@xxxxxxxxxxx] On Behalf Of Konstantin Komissarchik
Sent: Tuesday, May 02, 2006 3:34 PM
To: General discussion of project-wide or architectural issues.
Subject: [wtp-dev] Request PMC approval for 139863 for 1.0.3

 

 

This bug covers improving our workaround for the case where java vm cannot be detected. The current behavior is rather bad for people who hit it and the fix is pretty safe. 

 

- Konstantin

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