Hi Jeremy, I think your email points out *why* turning this on out of the blocks is going to make things a ton more difficult. IMHO, 9 needs to be opt-in rather than opt-out. By 10 I think we’ll be ready for opt-out rather than opt-in.
Kind regards, Kirk Pepperdine > On May 5, 2017, at 8:39 AM, Jeremy Manson <jeremyman...@google.com> wrote: > > Thanks, Dalibor. > > I know it may sound surprising, but I'm not actually complaining. I do > understand that most everything we're doing that requires workarounds for > modules is unsupported (with the possible exception of the changes to > instrumentation agents), and we were always doing them at our own risk. > This is far from limited to Xbootclasspath - we have all sorts of hacks, > including, to pick two things at random among many, code that introspects a > Thread's Runnable to pick a good name to report for a thread, and code that > introspects an AbstractInterruptibleChannel to stop the owning thread from > closing the channel when it gets an interrupt. > > It's our problem to fix these issues, and I'm unlikely to claim otherwise. > Frankly, it doesn't seem all that difficult to find other ways to > introspect into the JDK - it's just busywork and more awkward than it used > to be. > > Mostly, I'm telling you all because I think it makes an interesting case > study - a large Java installation and the issues it faces trying to roll > out JDK 9. > > If other installations do the kinds of things that we do, the path to a JDK > 9 without lots of add-exports and kill switch options is likely to be slow > and laborious for them. We're comparatively well situated to do it - we > have our own JDK build and a staffed team to do / help with the migration, > and are likely to roll it out to everyone with the kill switch turned on by > default so that our awful hacks can stay put until we finish fixing them. > > (Also, if I were complaining, there would have been a lot of choice things > I would have said that I'm not going to say. :) ) > > Jeremy > > On Thu, May 4, 2017 at 4:35 AM, dalibor topic <dalibor.to...@oracle.com> > wrote: > >> On 02.05.2017 18:46, Jeremy Manson wrote: >> >>> People >>> are using Xbootclasspath for a variety of things. >>> >> >> It's worth keeping in mind when using such options that >> >> "Non-standard options are general purpose options that are specific to the >> Java HotSpot Virtual Machine, so they are not guaranteed to be supported by >> all JVM implementations, and are subject to change. These options start >> with -X." >> >> http://docs.oracle.com/javase/8/docs/technotes/tools/unix/ja >> va.html#BABHDABI >> >> cheers, >> dalibor topic >> -- >> <http://www.oracle.com> Dalibor Topic | Principal Product Manager >> Phone: +494089091214 <tel:+494089091214> | Mobile: +491737185961 >> <tel:+491737185961> >> >> ORACLE Deutschland B.V. & Co. KG | Kühnehöfe 5 | 22761 Hamburg >> >> ORACLE Deutschland B.V. & Co. KG >> Hauptverwaltung: Riesstr. 25, D-80992 München >> Registergericht: Amtsgericht München, HRA 95603 >> >> Komplementärin: ORACLE Deutschland Verwaltung B.V. >> Hertogswetering 163/167, 3543 AS Utrecht, Niederlande >> Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 >> Geschäftsführer: Alexander van der Ven, Jan Schultheiss, Val Maher >> >> <http://www.oracle.com/commitment> Oracle is committed to developing >> practices and products that help protect the environment >>
