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Re: [wtp-dev] Request PMC approval for 139863 for 1.0.3
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Hi Konstantin, the version cannot be detected on MacOS because the of
the implementation of MacOSXVMInstall does not override the null
returning abstract impl of getJavaVersion(). This is fixed in 3.2.
As far as JRockit, it could be that you need to provide a custom VM
Type and implementation of IVMInstall.
- sachin
On May 3, 2006, at 11:59 PM, Konstantin Komissarchik wrote:
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
See https://bugs.eclipse.org/bugs/show_bug.cgi?id=139863 for details.
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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