+1 from Mesosphere On Mon, Mar 28, 2016 at 5:12 AM, Steve Loughran <ste...@hortonworks.com> wrote:
> > > On 25 Mar 2016, at 01:59, Mridul Muralidharan <mri...@gmail.com> wrote: > > > > Removing compatibility (with jdk, etc) can be done with a major release- > given that 7 has been EOLed a while back and is now unsupported, we have to > decide if we drop support for it in 2.0 or 3.0 (2+ years from now). > > > > Given the functionality & performance benefits of going to jdk8, future > enhancements relevant in 2.x timeframe ( scala, dependencies) which > requires it, and simplicity wrt code, test & support it looks like a good > checkpoint to drop jdk7 support. > > > > As already mentioned in the thread, existing yarn clusters are > unaffected if they want to continue running jdk7 and yet use spark2 > (install jdk8 on all nodes and use it via JAVA_HOME, or worst case > distribute jdk8 as archive - suboptimal). > > you wouldn't want to dist it as an archive; it's not just the binaries, > it's the install phase. And you'd better remember to put the JCE jar in on > top of the JDK for kerberos to work. > > setting up environment vars to point to JDK8 in the launched app/container > avoids that. Yes, the ops team do need to install java, but if you offer > them the choice of "installing a centrally managed Java" and "having my > code try and install it", they should go for the managed option. > > One thing to consider for 2.0 is to make it easier to set up those env > vars for both python and java. And, as the techniques for mixing JDK > versions is clearly not that well known, documenting it. > > (FWIW I've done code which even uploads it's own hadoop-* JAR, but what > gets you is changes in the hadoop-native libs; you do need to get the PATH > var spot on) > > > > I am unsure about mesos (standalone might be easier upgrade I guess ?). > > > > > > Proposal is for 1.6x line to continue to be supported with critical > fixes; newer features will require 2.x and so jdk8 > > > > Regards > > Mridul > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@spark.apache.org > For additional commands, e-mail: dev-h...@spark.apache.org > > -- Michael Gummelt Software Engineer Mesosphere
