On Tue, Feb 26, 2019 at 8:54 PM Chris Plummer <chris.plum...@oracle.com> wrote:
> On 2/26/19 9:34 AM, Erik Gahlin wrote: > > On 2019-02-26 07:47, Thomas Stüfe wrote: > > Hi David, Yasumasa, > > >> >> > Do we support connection to later VMs from earlier JDK tools? >> >> I could not find the spec about this. >> So I asked to serviceability folks before filing this to JBS :-) >> >> > Just to chime in on that, I do not know if it is specified but it is > certainly very handy in daily use. I often use old jcmd tools to connect to > newer VMs. I always thought that was a neat design. > > > I agree. > > The tool was designed to be dumb, so it can connect to JVMs regardless of > release. If something has changed so that is no longer true, it should be > fixed (and backported if needed). > > Erik > > So do we all agree that backporting is acceptable for fixing backwards > compatibility here? Just want to be clear on that. You would need to get > the latest 8u to interact with 13 and later, and 7 and earlier would not > work. I'd prefer to keep 8 (and earlier) working without any changes to it > if possible. > > This kind of compatibility would be very nice to keep. Again, just chiming in. ..Thomas > Also want to point out that this issue might be two-way: 8 can't attach to > 13 and 13 may have issues attaching to 8 (what happens with the extra > argument that is sent?). > > Chris > > > > ..Thomas > > > > >
