[ExM Users] stc unsupported class error

[Tim Armstrong]

Ok, I've created an issue for it.  A possible workaround is to set your
PATH in your .bashrc.

- Tim


On Mon, Apr 28, 2014 at 4:43 PM, Tim Armstrong <tim.g.armstrong at gmail.com>wrote:

> Hmm, the code that decides which java to use when -j isn't set is really
> simple:
>
> JVM=$( which java || true )
>
> It doesn't seem like anything could possibly go wrong, but i've been able
> to replicate the problem on the mcs login hosts.  I'll investigate.
>
> - Tim
>
>
>
> On Mon, Apr 28, 2014 at 3:21 PM, Ketan Maheshwari <ketan at mcs.anl.gov>wrote:
>
>> It shows the following:
>> declare -x
>> PATH="/homes/ketan/cloud/ec2-api-tools-1.6.12.2/bin:/homes/ketan/apache-maven-3.2.1/bin:/homes/ketan/jdk1.7.0_07/bin:/homes/ketan/globus-install/bin:/homes/ketan/swift-0.94/cog/modules/swift/dist/swift-svn/bin:/homes/ketan/escience_2013/swift:/home/ketan/CoinIpopt/bin:/homes/ketan/cctools-install/bin:/home/neosotc/neos-bin:/home/ketan/tcl-install/bin:/home/ketan/mpich3-install/bin:/home/ketan/exm-install/turbine/bin:/home/ketan/exm-install/stc/bin:/homes/ketan/swig-install/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/mcs/bin:/usr/local/bin:/software/common/bin:/soft/apps/bin:/soft/gnu/bin:/soft/com/bin:/soft/adm/bin:/homes/ketan/bin/linux-Ubuntu_12.04-x86_64:/homes/ketan/bin"
>>
>> It does have both /usr/bin and /homes/ketan/jdk1.7.0_07/bin and seems
>> /homes/ketan/jdk1.7.0_07/bin appears before /usr/bin which makes
>> /homes/ketan/jdk1.7.0_07/bin appear as default java.
>>
>>
>> On Mon, Apr 28, 2014 at 3:16 PM, Tim Armstrong <tim.g.armstrong at gmail.com
>> > wrote:
>>
>>>  Can you check that the PATH is exported, e.g:
>>>
>>> export | grep PATH
>>>
>>>
>>> On Mon, Apr 28, 2014 at 2:25 PM, Ketan Maheshwari <ketan at mcs.anl.gov>wrote:
>>>
>>>> Strange:
>>>>
>>>>  $ stc -v
>>>> STC: Swift-Turbine Compiler
>>>> for Turbine: 0.3.0
>>>> TURBINE_INSTALL=
>>>> TURBINE_HOME=/home/ketan/exm-install/turbine
>>>> Using Java: /usr/bin/java
>>>> $ which java
>>>> /homes/ketan/jdk1.7.0_07/bin/java
>>>>
>>>>
>>>>
>>>>
>>>>  On Mon, Apr 28, 2014 at 2:11 PM, Tim Armstrong <
>>>> tim.g.armstrong at gmail.com> wrote:
>>>>
>>>>>   Hmm, the code to locate java is really simple, it does a "which
>>>>> java" and that's all.  Is your path variable being exported after you add
>>>>> Java to it?
>>>>>
>>>>> You can get stc to report which java it's using with the lower case -v
>>>>> flag too.
>>>>>
>>>>>   - Tim
>>>>>
>>>>>
>>>>>  On Mon, Apr 28, 2014 at 12:58 PM, Ketan Maheshwari <ketan at mcs.anl.gov
>>>>> > wrote:
>>>>>
>>>>>> It appears so. I have my own java in PATH and am using the same for
>>>>>> building and running.
>>>>>>
>>>>>>
>>>>>>  On Mon, Apr 28, 2014 at 11:15 AM, Tim Armstrong <
>>>>>> tim.g.armstrong at gmail.com> wrote:
>>>>>>
>>>>>>>   It should default to the java in PATH - is it not doing that for
>>>>>>> you?
>>>>>>>
>>>>>>>  Currently it only uses two things to resolve java: the -j flag, and
>>>>>>> "which java" - other environment variables, etc, shouldn't affect it.
>>>>>>>
>>>>>>>  - Tim
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Apr 28, 2014 at 11:04 AM, Ketan Maheshwari <
>>>>>>> ketan at mcs.anl.gov> wrote:
>>>>>>>
>>>>>>>> Hi Tim,
>>>>>>>>
>>>>>>>>  stc -V does not seem to show which java it is running with:
>>>>>>>>
>>>>>>>>  $ stc -V user.swift
>>>>>>>> stc: Optimization level 2
>>>>>>>>  Exception in thread "main"
>>>>>>>> java.lang.UnsupportedClassVersionError: exm/stc/ui/Main : Unsupported
>>>>>>>> major.minor version 51.0
>>>>>>>>
>>>>>>>>  The -j option works but in my case, the stc call is part of a
>>>>>>>> generic script and this will involve detecting java on systems to run with.
>>>>>>>> Is it somehow possible to tell stc to use the same java in current env at
>>>>>>>> the time of build and run.
>>>>>>>>
>>>>>>>>  Thanks,
>>>>>>>> Ketan
>>>>>>>>
>>>>>>>>
>>>>>>>>  On Mon, Apr 28, 2014 at 10:56 AM, Tim Armstrong <
>>>>>>>> tim.g.armstrong at gmail.com> wrote:
>>>>>>>>
>>>>>>>>>   I haven't seen that one before.  It sounds like it's being run
>>>>>>>>> with an older version of Java than it was compiled with.
>>>>>>>>>
>>>>>>>>> Java class version 51.0 corresponds to java 7 (
>>>>>>>>> http://en.wikipedia.org/wiki/Java_class_file#General_layout), so
>>>>>>>>> it seems like it must be getting run with an older version.
>>>>>>>>>
>>>>>>>>>  You could try the -V switch to STC to see which java it's being
>>>>>>>>> run with, and then -j /path/to/jvm/bin/java to force a different java
>>>>>>>>> version.
>>>>>>>>>
>>>>>>>>>  - Tim
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>   On Mon, Apr 28, 2014 at 10:33 AM, Ketan Maheshwari <
>>>>>>>>> ketan at mcs.anl.gov> wrote:
>>>>>>>>>
>>>>>>>>>>   Hi,
>>>>>>>>>>
>>>>>>>>>>  While running stc on MCS workstations, I get:
>>>>>>>>>>
>>>>>>>>>>  ./genleaf vanilla mockdock.c mockdock.h user.swift
>>>>>>>>>>  Exception in thread "main"
>>>>>>>>>> java.lang.UnsupportedClassVersionError: exm/stc/ui/Main : Unsupported
>>>>>>>>>> major.minor version 51.0
>>>>>>>>>>
>>>>>>>>>>  Somehow the java versions at build and runtime are getting
>>>>>>>>>> mixed up.
>>>>>>>>>>
>>>>>>>>>>  This is how I build:
>>>>>>>>>>
>>>>>>>>>>  export JAVA_HOME=/homes/ketan/jdk1.7.0_07
>>>>>>>>>>  ant install -Ddist.dir=/home/ketan/exm-install/stc
>>>>>>>>>>
>>>>>>>>>>  I have the same java in my env:
>>>>>>>>>>
>>>>>>>>>>  $ which java
>>>>>>>>>> /homes/ketan/jdk1.7.0_07/bin/java
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>  Any suggestions to fix this?
>>>>>>>>>>
>>>>>>>>>>  Thanks,
>>>>>>>>>> Ketan
>>>>>>>>>>
>>>>>>>>>>   _______________________________________________
>>>>>>>>>> ExM-user mailing list
>>>>>>>>>> ExM-user at lists.mcs.anl.gov
>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/exm-user
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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