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Posted to common-dev@hadoop.apache.org by Scott Carey <sc...@richrelevance.com> on 2012/04/26 23:03:30 UTC
Java 7 and Hadoop
Java 7 update 4 has been released. It is even available for MacOS X from Oracle:
http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-1591156.html
Java 6 will reach end of life in about 6 months. After that point, there will be no more public updates from Oracle for Java 6, even security updates.
https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
You can of course pay them for updates or build your own OpenJDK.
The entire Hadoop ecosystem needs to test against Java 7 JDKs this year. I will be testing some small clusters of ours with JDK 7 in about a month, and my internal projects will start using Java 7 features shortly after.
See the JDK roadmap:
http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
Re: Java 7 and Hadoop
Posted by Eli Collins <el...@cloudera.com>.
On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com> wrote:
> Java 7 update 4 has been released. It is even available for MacOS X from Oracle:
> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-1591156.html
>
> Java 6 will reach end of life in about 6 months. After that point, there will be no more public updates from Oracle for Java 6, even security updates.
> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
> You can of course pay them for updates or build your own OpenJDK.
>
> The entire Hadoop ecosystem needs to test against Java 7 JDKs this year.
Forgot to mention, Apache Bigtop has started an effort here (see BIGTOP-458).
Re: Java 7 and Hadoop
Posted by Ted Yu <yu...@gmail.com>.
For HBase, under https://builds.apache.org/job/HBase-TRUNK/configure, there
is an entry labeled JDK where you can select 'JDK 1.7 (latest)'
I guess it would be similar for hadoop builds.
Cheers
On Fri, Aug 2, 2013 at 10:55 AM, Sandy Ryza <sa...@cloudera.com> wrote:
> How do we go about setting up builds on jdk7? Couldn't figure out how to
> do it on Jenkins, so I'm assuming it either requires PMC or Infra?
>
> -Sandy
>
>
> On Thu, Jul 25, 2013 at 10:43 AM, Santhosh M S <santhosh_muthur@yahoo.com
> >wrote:
>
> > Resurrecting an old thread - now that JDK 6 is EOL should we switch over
> > to JDK 7 across the board?
> >
> > Thoughts?
> >
> > Thanks,
> > Santhosh
> >
> >
> > ________________________________
> > From: Eli Collins <el...@cloudera.com>
> > To: common-dev@hadoop.apache.org
> > Sent: Tuesday, July 31, 2012 6:19 PM
> > Subject: Re: Java 7 and Hadoop
> >
> >
> > We should officially support it in Hadoop (one piece of BIGTOP-458
> > which is for supporting it across the whole stack).
> > Now that HADOOP-8370 (fixes native compilation) is in the full tarball
> > should work. A good next step would be updating JAVA_HOME on one of
> > the Hadoop jenkins jobs to use jdk7.
> >
> >
> > On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com>
> > wrote:
> > > I've seen more and more people using java 7. We are also planning to
> > move
> > > to java 7 due to the eol of java 6 that Scott referenced.
> > >
> > > What are folks thoughts on making it officially supported by Hadoop?
> Is
> > > there a process for this or is it simply updating the wiki Eli
> mentioned
> > > after sufficient testing?
> > >
> > > Thanks,
> > > Tom
> > >
> > >
> > > On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
> > >
> > >> Hey Scott,
> > >>
> > >> Nice. Please update this page with your experience when you get a
> > chance:
> > >> http://wiki.apache.org/hadoop/HadoopJavaVersions
> > >>
> > >> Thanks,
> > >> Eli
> > >>
> > >>
> > >> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <scott@richrelevance.com
> >
> > wrote:
> > >>> Java 7 update 4 has been released. It is even available for MacOS X
> > from
> > >>> Oracle:
> > >>>
> >
> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
> > >>> 1156.html
> > >>>
> > >>> Java 6 will reach end of life in about 6 months. After that point,
> > there
> > >>> will be no more public updates from Oracle for Java 6, even security
> > updates.
> > >>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
> > >>> You can of course pay them for updates or build your own OpenJDK.
> > >>>
> > >>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this
> > year. I
> > >>> will be testing some small clusters of ours with JDK 7 in about a
> > month, and
> > >>> my internal projects will start using Java 7 features shortly after.
> > >>>
> > >>>
> > >>> See the JDK roadmap:
> > >>>
> >
> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
> > >>>
> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
> > >>>
> > >>>
> > >
>
Re: Java 7 and Hadoop
Posted by Sangjin Lee <sj...@apache.org>.
This is how we work through this in hadoop-lzo using profiles:
https://github.com/twitter/hadoop-lzo/blob/master/pom.xml#L105
Of course, if we have more than one use for profiles things would get hairy
quickly. FWIW.
Sangjin
On Sat, Aug 3, 2013 at 1:34 AM, Steve Loughran <st...@hortonworks.com>wrote:
> would be nice for JDK7 builds to work on OSX -gave up the last time I
> tried, though we should see if the mvn plugins have been updated for this
> https://issues.apache.org/jira/browse/HADOOP-9350
>
> http://steveloughran.blogspot.co.uk/2013/03/hadoop-java7-and-osx-or-what-is-it.html
>
> It looks like there is a fork that does work
> https://jira.codehaus.org/browse/MJSPC-53
>
Re: Java 7 and Hadoop
Posted by Steve Loughran <st...@hortonworks.com>.
would be nice for JDK7 builds to work on OSX -gave up the last time I
tried, though we should see if the mvn plugins have been updated for this
https://issues.apache.org/jira/browse/HADOOP-9350
http://steveloughran.blogspot.co.uk/2013/03/hadoop-java7-and-osx-or-what-is-it.html
It looks like there is a fork that does work
https://jira.codehaus.org/browse/MJSPC-53
Re: Java 7 and Hadoop
Posted by Eli Collins <el...@cloudera.com>.
Sandy and I just created a job, will run daily like the current trunk job.
https://builds.apache.org/job/Hadoop-trunk-java7
On Fri, Aug 2, 2013 at 1:34 PM, Eli Collins <el...@cloudera.com> wrote:
> You should be able to login to builds.apache.org using your Apache
> credentials and create a job. I'd copy the Hadoop trunk job and just
> update the JDK dropdown to "JDK 1.7 (latest)". You can ping me today
> if that doesn't work.
>
> On Fri, Aug 2, 2013 at 10:55 AM, Sandy Ryza <sa...@cloudera.com> wrote:
>> How do we go about setting up builds on jdk7? Couldn't figure out how to
>> do it on Jenkins, so I'm assuming it either requires PMC or Infra?
>>
>> -Sandy
>>
>>
>> On Thu, Jul 25, 2013 at 10:43 AM, Santhosh M S <sa...@yahoo.com>wrote:
>>
>>> Resurrecting an old thread - now that JDK 6 is EOL should we switch over
>>> to JDK 7 across the board?
>>>
>>> Thoughts?
>>>
>>> Thanks,
>>> Santhosh
>>>
>>>
>>> ________________________________
>>> From: Eli Collins <el...@cloudera.com>
>>> To: common-dev@hadoop.apache.org
>>> Sent: Tuesday, July 31, 2012 6:19 PM
>>> Subject: Re: Java 7 and Hadoop
>>>
>>>
>>> We should officially support it in Hadoop (one piece of BIGTOP-458
>>> which is for supporting it across the whole stack).
>>> Now that HADOOP-8370 (fixes native compilation) is in the full tarball
>>> should work. A good next step would be updating JAVA_HOME on one of
>>> the Hadoop jenkins jobs to use jdk7.
>>>
>>>
>>> On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com>
>>> wrote:
>>> > I've seen more and more people using java 7. We are also planning to
>>> move
>>> > to java 7 due to the eol of java 6 that Scott referenced.
>>> >
>>> > What are folks thoughts on making it officially supported by Hadoop? Is
>>> > there a process for this or is it simply updating the wiki Eli mentioned
>>> > after sufficient testing?
>>> >
>>> > Thanks,
>>> > Tom
>>> >
>>> >
>>> > On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
>>> >
>>> >> Hey Scott,
>>> >>
>>> >> Nice. Please update this page with your experience when you get a
>>> chance:
>>> >> http://wiki.apache.org/hadoop/HadoopJavaVersions
>>> >>
>>> >> Thanks,
>>> >> Eli
>>> >>
>>> >>
>>> >> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com>
>>> wrote:
>>> >>> Java 7 update 4 has been released. It is even available for MacOS X
>>> from
>>> >>> Oracle:
>>> >>>
>>> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
>>> >>> 1156.html
>>> >>>
>>> >>> Java 6 will reach end of life in about 6 months. After that point,
>>> there
>>> >>> will be no more public updates from Oracle for Java 6, even security
>>> updates.
>>> >>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
>>> >>> You can of course pay them for updates or build your own OpenJDK.
>>> >>>
>>> >>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this
>>> year. I
>>> >>> will be testing some small clusters of ours with JDK 7 in about a
>>> month, and
>>> >>> my internal projects will start using Java 7 features shortly after.
>>> >>>
>>> >>>
>>> >>> See the JDK roadmap:
>>> >>>
>>> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
>>> >>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>>> >>>
>>> >>>
>>> >
Re: Java 7 and Hadoop
Posted by Eli Collins <el...@cloudera.com>.
You should be able to login to builds.apache.org using your Apache
credentials and create a job. I'd copy the Hadoop trunk job and just
update the JDK dropdown to "JDK 1.7 (latest)". You can ping me today
if that doesn't work.
On Fri, Aug 2, 2013 at 10:55 AM, Sandy Ryza <sa...@cloudera.com> wrote:
> How do we go about setting up builds on jdk7? Couldn't figure out how to
> do it on Jenkins, so I'm assuming it either requires PMC or Infra?
>
> -Sandy
>
>
> On Thu, Jul 25, 2013 at 10:43 AM, Santhosh M S <sa...@yahoo.com>wrote:
>
>> Resurrecting an old thread - now that JDK 6 is EOL should we switch over
>> to JDK 7 across the board?
>>
>> Thoughts?
>>
>> Thanks,
>> Santhosh
>>
>>
>> ________________________________
>> From: Eli Collins <el...@cloudera.com>
>> To: common-dev@hadoop.apache.org
>> Sent: Tuesday, July 31, 2012 6:19 PM
>> Subject: Re: Java 7 and Hadoop
>>
>>
>> We should officially support it in Hadoop (one piece of BIGTOP-458
>> which is for supporting it across the whole stack).
>> Now that HADOOP-8370 (fixes native compilation) is in the full tarball
>> should work. A good next step would be updating JAVA_HOME on one of
>> the Hadoop jenkins jobs to use jdk7.
>>
>>
>> On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com>
>> wrote:
>> > I've seen more and more people using java 7. We are also planning to
>> move
>> > to java 7 due to the eol of java 6 that Scott referenced.
>> >
>> > What are folks thoughts on making it officially supported by Hadoop? Is
>> > there a process for this or is it simply updating the wiki Eli mentioned
>> > after sufficient testing?
>> >
>> > Thanks,
>> > Tom
>> >
>> >
>> > On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
>> >
>> >> Hey Scott,
>> >>
>> >> Nice. Please update this page with your experience when you get a
>> chance:
>> >> http://wiki.apache.org/hadoop/HadoopJavaVersions
>> >>
>> >> Thanks,
>> >> Eli
>> >>
>> >>
>> >> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com>
>> wrote:
>> >>> Java 7 update 4 has been released. It is even available for MacOS X
>> from
>> >>> Oracle:
>> >>>
>> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
>> >>> 1156.html
>> >>>
>> >>> Java 6 will reach end of life in about 6 months. After that point,
>> there
>> >>> will be no more public updates from Oracle for Java 6, even security
>> updates.
>> >>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
>> >>> You can of course pay them for updates or build your own OpenJDK.
>> >>>
>> >>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this
>> year. I
>> >>> will be testing some small clusters of ours with JDK 7 in about a
>> month, and
>> >>> my internal projects will start using Java 7 features shortly after.
>> >>>
>> >>>
>> >>> See the JDK roadmap:
>> >>>
>> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
>> >>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>> >>>
>> >>>
>> >
Re: Java 7 and Hadoop
Posted by Sandy Ryza <sa...@cloudera.com>.
How do we go about setting up builds on jdk7? Couldn't figure out how to
do it on Jenkins, so I'm assuming it either requires PMC or Infra?
-Sandy
On Thu, Jul 25, 2013 at 10:43 AM, Santhosh M S <sa...@yahoo.com>wrote:
> Resurrecting an old thread - now that JDK 6 is EOL should we switch over
> to JDK 7 across the board?
>
> Thoughts?
>
> Thanks,
> Santhosh
>
>
> ________________________________
> From: Eli Collins <el...@cloudera.com>
> To: common-dev@hadoop.apache.org
> Sent: Tuesday, July 31, 2012 6:19 PM
> Subject: Re: Java 7 and Hadoop
>
>
> We should officially support it in Hadoop (one piece of BIGTOP-458
> which is for supporting it across the whole stack).
> Now that HADOOP-8370 (fixes native compilation) is in the full tarball
> should work. A good next step would be updating JAVA_HOME on one of
> the Hadoop jenkins jobs to use jdk7.
>
>
> On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com>
> wrote:
> > I've seen more and more people using java 7. We are also planning to
> move
> > to java 7 due to the eol of java 6 that Scott referenced.
> >
> > What are folks thoughts on making it officially supported by Hadoop? Is
> > there a process for this or is it simply updating the wiki Eli mentioned
> > after sufficient testing?
> >
> > Thanks,
> > Tom
> >
> >
> > On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
> >
> >> Hey Scott,
> >>
> >> Nice. Please update this page with your experience when you get a
> chance:
> >> http://wiki.apache.org/hadoop/HadoopJavaVersions
> >>
> >> Thanks,
> >> Eli
> >>
> >>
> >> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com>
> wrote:
> >>> Java 7 update 4 has been released. It is even available for MacOS X
> from
> >>> Oracle:
> >>>
> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
> >>> 1156.html
> >>>
> >>> Java 6 will reach end of life in about 6 months. After that point,
> there
> >>> will be no more public updates from Oracle for Java 6, even security
> updates.
> >>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
> >>> You can of course pay them for updates or build your own OpenJDK.
> >>>
> >>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this
> year. I
> >>> will be testing some small clusters of ours with JDK 7 in about a
> month, and
> >>> my internal projects will start using Java 7 features shortly after.
> >>>
> >>>
> >>> See the JDK roadmap:
> >>>
> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
> >>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
> >>>
> >>>
> >
Re: Java 7 and Hadoop
Posted by Santhosh M S <sa...@yahoo.com>.
Resurrecting an old thread - now that JDK 6 is EOL should we switch over to JDK 7 across the board?
Thoughts?
Thanks,
Santhosh
________________________________
From: Eli Collins <el...@cloudera.com>
To: common-dev@hadoop.apache.org
Sent: Tuesday, July 31, 2012 6:19 PM
Subject: Re: Java 7 and Hadoop
We should officially support it in Hadoop (one piece of BIGTOP-458
which is for supporting it across the whole stack).
Now that HADOOP-8370 (fixes native compilation) is in the full tarball
should work. A good next step would be updating JAVA_HOME on one of
the Hadoop jenkins jobs to use jdk7.
On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com> wrote:
> I've seen more and more people using java 7. We are also planning to move
> to java 7 due to the eol of java 6 that Scott referenced.
>
> What are folks thoughts on making it officially supported by Hadoop? Is
> there a process for this or is it simply updating the wiki Eli mentioned
> after sufficient testing?
>
> Thanks,
> Tom
>
>
> On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
>
>> Hey Scott,
>>
>> Nice. Please update this page with your experience when you get a chance:
>> http://wiki.apache.org/hadoop/HadoopJavaVersions
>>
>> Thanks,
>> Eli
>>
>>
>> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com> wrote:
>>> Java 7 update 4 has been released. It is even available for MacOS X from
>>> Oracle:
>>> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
>>> 1156.html
>>>
>>> Java 6 will reach end of life in about 6 months. After that point, there
>>> will be no more public updates from Oracle for Java 6, even security updates.
>>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
>>> You can of course pay them for updates or build your own OpenJDK.
>>>
>>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this year. I
>>> will be testing some small clusters of ours with JDK 7 in about a month, and
>>> my internal projects will start using Java 7 features shortly after.
>>>
>>>
>>> See the JDK roadmap:
>>> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
>>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>>>
>>>
>
Re: Java 7 and Hadoop
Posted by Eli Collins <el...@cloudera.com>.
We should officially support it in Hadoop (one piece of BIGTOP-458
which is for supporting it across the whole stack).
Now that HADOOP-8370 (fixes native compilation) is in the full tarball
should work. A good next step would be updating JAVA_HOME on one of
the Hadoop jenkins jobs to use jdk7.
On Tue, Jul 31, 2012 at 9:17 AM, Thomas Graves <tg...@yahoo-inc.com> wrote:
> I've seen more and more people using java 7. We are also planning to move
> to java 7 due to the eol of java 6 that Scott referenced.
>
> What are folks thoughts on making it officially supported by Hadoop? Is
> there a process for this or is it simply updating the wiki Eli mentioned
> after sufficient testing?
>
> Thanks,
> Tom
>
>
> On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
>
>> Hey Scott,
>>
>> Nice. Please update this page with your experience when you get a chance:
>> http://wiki.apache.org/hadoop/HadoopJavaVersions
>>
>> Thanks,
>> Eli
>>
>>
>> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com> wrote:
>>> Java 7 update 4 has been released. It is even available for MacOS X from
>>> Oracle:
>>> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
>>> 1156.html
>>>
>>> Java 6 will reach end of life in about 6 months. After that point, there
>>> will be no more public updates from Oracle for Java 6, even security updates.
>>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
>>> You can of course pay them for updates or build your own OpenJDK.
>>>
>>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this year. I
>>> will be testing some small clusters of ours with JDK 7 in about a month, and
>>> my internal projects will start using Java 7 features shortly after.
>>>
>>>
>>> See the JDK roadmap:
>>> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
>>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>>>
>>>
>
Re: Java 7 and Hadoop
Posted by Thomas Graves <tg...@yahoo-inc.com>.
I've seen more and more people using java 7. We are also planning to move
to java 7 due to the eol of java 6 that Scott referenced.
What are folks thoughts on making it officially supported by Hadoop? Is
there a process for this or is it simply updating the wiki Eli mentioned
after sufficient testing?
Thanks,
Tom
On 4/26/12 4:25 PM, "Eli Collins" <el...@cloudera.com> wrote:
> Hey Scott,
>
> Nice. Please update this page with your experience when you get a chance:
> http://wiki.apache.org/hadoop/HadoopJavaVersions
>
> Thanks,
> Eli
>
>
> On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com> wrote:
>> Java 7 update 4 has been released. It is even available for MacOS X from
>> Oracle:
>> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-159
>> 1156.html
>>
>> Java 6 will reach end of life in about 6 months. After that point, there
>> will be no more public updates from Oracle for Java 6, even security updates.
>> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
>> You can of course pay them for updates or build your own OpenJDK.
>>
>> The entire Hadoop ecosystem needs to test against Java 7 JDKs this year. I
>> will be testing some small clusters of ours with JDK 7 in about a month, and
>> my internal projects will start using Java 7 features shortly after.
>>
>>
>> See the JDK roadmap:
>> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
>> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>>
>>
Re: Java 7 and Hadoop
Posted by Eli Collins <el...@cloudera.com>.
Hey Scott,
Nice. Please update this page with your experience when you get a chance:
http://wiki.apache.org/hadoop/HadoopJavaVersions
Thanks,
Eli
On Thu, Apr 26, 2012 at 2:03 PM, Scott Carey <sc...@richrelevance.com> wrote:
> Java 7 update 4 has been released. It is even available for MacOS X from Oracle:
> http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-1591156.html
>
> Java 6 will reach end of life in about 6 months. After that point, there will be no more public updates from Oracle for Java 6, even security updates.
> https://blogs.oracle.com/henrik/entry/updated_java_6_eol_date
> You can of course pay them for updates or build your own OpenJDK.
>
> The entire Hadoop ecosystem needs to test against Java 7 JDKs this year. I will be testing some small clusters of ours with JDK 7 in about a month, and my internal projects will start using Java 7 features shortly after.
>
>
> See the JDK roadmap:
> http://blogs.oracle.com/javaone/resource/java_keynote/slide_15_full_size.gif
> https://blogs.oracle.com/java/entry/moving_java_forward_java_strategy
>
>