Question is what is minimal Java that we should require Mahout users to use. It was raised to 1.7 via MAHOUT-1652 <https://issues.apache.org/jira/browse/MAHOUT-1652>. It enables us to use Java 1.7 APIs, finally. E.g. after level was raised I was recently able to eliminate some usage of Guava for closing Closable's with using try-with-resources Java 7 construct. We should minimize dependencies, there are IMO too many. Depending more and more on standard libraries of Java and Scala helps in that direction. Hopefully we do not wait much longer before the level is raised even further to 1.8, so we have even less 3rd party dependencies.
On Fri, Mar 27, 2015 at 5:31 PM, Pat Ferrel <[email protected]> wrote: > It should, Hadoop supports it long term and lots of people stuck there > with projects that haven’t been upgraded (Mahout comes to mind). > > On Mar 27, 2015, at 9:26 AM, Stevo Slavić <[email protected]> wrote: > > Have to check but I doubt that build supports hadoop 1.x any more. > > On Fri, Mar 27, 2015 at 5:15 PM, Suneel Marthi <[email protected]> > wrote: > > > This is the Java version, gotta use Java 7 > > > > On Fri, Mar 27, 2015 at 12:08 PM, Pat Ferrel <[email protected]> > > wrote: > > > >> Latest source for Spark 1.1.0 and Hadoop 1.2.1 > >> > >> Build complains about the move to > >> <maven.compiler.target>1.7</maven.compiler.target> I think this was > upped > >> from 1.6 but not sure if that’s what the error is about. > >> > >> I’m on Java 6 no this machine if that matters. > >> > >> Actual error: > >> > >> [INFO] Mahout Build Tools ................................ SUCCESS > > [3.512s] > >> [INFO] Apache Mahout ..................................... SUCCESS > > [0.603s] > >> [INFO] Mahout Math ....................................... FAILURE > > [6.453s] > >> [INFO] Mahout MapReduce Legacy ........................... SKIPPED > >> [INFO] Mahout Integration ................................ SKIPPED > >> [INFO] Mahout Examples ................................... SKIPPED > >> [INFO] Mahout Release Package ............................ SKIPPED > >> [INFO] Mahout Math Scala bindings ........................ SKIPPED > >> [INFO] Mahout Spark bindings ............................. SKIPPED > >> [INFO] Mahout Spark bindings shell ....................... SKIPPED > >> [INFO] Mahout H2O backend ................................ SKIPPED > >> [INFO] > >> ------------------------------------------------------------------------ > >> [INFO] BUILD FAILURE > >> [INFO] > >> ------------------------------------------------------------------------ > >> [INFO] Total time: 11.609s > >> [INFO] Finished at: Fri Mar 27 08:55:35 PDT 2015 > >> [INFO] Final Memory: 24M/310M > >> [INFO] > >> ------------------------------------------------------------------------ > >> [ERROR] Failed to execute goal > >> org.apache.maven.plugins:maven-compiler-plugin:3.2:compile > >> (default-compile) on project mahout-math: Fatal error compiling: invalid > >> target release: 1.7 -> [Help 1] > >> [ERROR] > >> [ERROR] To see the full stack trace of the errors, re-run Maven with the > >> -e switch. > >> [ERROR] Re-run Maven using the -X switch to enable full debug logging. > >> [ERROR] > >> > >> > > > >
