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Subject: Re: [OMPI users] MPI Java bindings compile errors and missing datatype
From: Christoffer Hamberg (christoffer.hamberg_at_[hidden])
Date: 2013-11-19 05:17:41


I see, I'm running:

Ubuntu 13.04 (GNU/Linux 3.8.0-19-generic i686)
Linux node0 3.5.0-43-highbank #66-Ubuntu SMP Tue Oct 22 03:54:35 UTC 2013
armv7l armv7l armv7l GNU/Linux
gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
javac 1.7.0_25

Thank you for the information, I'll have a look at that.

/Christoffer

2013/11/15 Ralph Castain <rhc_at_[hidden]>

> I can't replicate these problems - I tried both the current trunk and v1.7
> branches. All appears to be in order. The Java support compiles without
> error, and mpijavac appears and functions as it should.
>
> What system are you using? Here's what I have:
>
> Linux bend001 2.6.32-358.18.1.el6.x86_64 #1 SMP Wed Aug 28 17:19:38 UTC
> 2013 x86_64 x86_64 x86_64 GNU/Linux
> gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
> javac 1.7.0_45
>
> As for the MPI.OBJECT issue: we completely revamped the Java bindings to
> (a) improve performance (they are now much, much closer to the C
> performance) and to make them better conform to the Java language standard
> terminology. So we are no longer compatible with the old mpiJava library -
> not only because of the APIs, but also because the new implementation is
> MPI-3 compliant.
>
> The authors of the work are generating some documentation and papers on
> it. For now, you can look at the MPI man pages to see the Java binding
> syntax, or use the Javadoc output (that is in the trunk but may not be in
> 1.7 yet).
>
>
> On Nov 15, 2013, at 6:04 AM, Christoffer Hamberg <
> christoffer.hamberg_at_[hidden]> wrote:
>
> Hi,
>
> I'm currently trying to get the included java bindings running but as I've
> mentioned in a previous post I've had some problems.
>
> ./configure --prefix=/opt/openmpi-1.9-java --without-openib
> --enable-static --with-threads=posix --enable-mpi-thread-multiple
> --enable-mpi-java --with-jdk-bindir=/usr/lib/jvm/java-7-openjdk-armhf/bin
> --with-jdk-headers=/usr/lib/jvm/java-7-openjdk-armhf/include
>
> The configure succeeds without any errors, but the build breaks in
> ompi/mpi/java/c since the compiler doesn't include the jdk-headers. I fixed
> the corresponding Makefile to include it and it works.
>
> The second error I get is in ompi/tools/wrappers/Makefile where it sets:
> am__append_1 = mpijavac.1
> am__append_2 = mpijavac.1
>
> shouldn't this be mpijavac.pl instead?
>
> I changed it to .pl and it seems to build with any more errors, "mpirun
> java" works fine for some simple Java tests.
>
> After this I tried some other tests using the MPI.OBJECT datatype, just to
> discover that it wasn't supported. I saw that it was included in mpiJava
> 1.2 and the current mpiJava in OMPI is 1.1(?). I guess the java bindings
> aren't that prioritized?
>
> Do you have any advice for me to do, should I try to update the bindings
> or do you have any other recommendations how to get it running?
>
> Regards,
> Christoffer Hamberg
>
>
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