Re: ov-java.cc-tst fails on Lubuntu 14.04

[Tatsuro MATSUOKA]

----- Original Message -----

> From: Rik
> To: Tatsuro MATSUOKA 
> Cc: Octave-Maintainers
> Date: 2015/6/6, Sat 01:10
> Subject: Re: ov-java.cc-tst fails on Lubuntu 14.04
> 
> On 06/04/2015 09:48 PM, Tatsuro MATSUOKA wrote:
>>  ----- Original Message -----
>> 
>>>  From: Tatsuro MATSUOKA 
>>  To: Rik  "octave-maintainers Julien Bect 
>>>  Cc: 
>>>  Date: 2015/6/4, Thu 19:55
>>>  Subject: Re: ov-java.cc-tst fails on Lubuntu 14.04
>>> 
>>>  ----- Original Message -----
>>> 
>>>>   From: Rik 
>>>>   To: Tatsuro MATSUOKA ; "octave-maintainers; Julien Bect> 
> Cc: 
>>>>   Date: 2015/6/3, Wed 11:53
>>>>   Subject: Re: ov-java.cc-tst fails on Lubuntu 14.04
>>>> 
>>>>   On 06/02/2015 04:28 PM, Tatsuro MATSUOKA wrote:
>>>>>>    I was going to wait on the results of your test and
>>>>>>    then post to octave-maintainers, but you have beaten me 
> to it. 
>>>>>    I apologize my impolite manner.
>>>>   No need to apologize.  It's not polite or impolite.  You were 
> simply
>>>>   working on finding a solution quickly.
>>>> 
>>>>>>    assert (javaMethod ("binarySearch", 
>>>>   "java.util.Arrays", 
>>>>>>    single ([90 100 255]), single (255)), 2);
>>>>>    This works without problem.
>>>>   Well that's good.  Maybe the default numeric type for a 32-bit 
> JRE is 
>>>  float
>>>>   rather than double?  Seems odd though.  The 32-bit JRE is supposed 
> to be
>>>>   about the size of references and therefore about the size of 
> addressable
>>>>   memory.
>>>> 
>>>>   --Rik
>>> 
>>>  I have built octave-4.0.0 on lubunutu 12.04 (32bit) using gcc-4.8.1.
>>>  Interestingly "test ov-java.cc-tst" passes.
>>> 
>>>>>   test ov-java.cc-tst
>>>  PASSES 5 out of 5 tests
>>> 
>>>  On lubuntu 14.04 (32 bit), I have used openjdk-7-jdk, openjdk-7-jre, 
>>>  openjdk-7-jre-headless (7u79-2.5.5-0ubuntu)
>>>  while on 12.04, I have used openjdk-6-jdk, openjdk-6-jre, 
>>>  and  openjdk-6-jre-headless (6b35-1.13.7-1ubunutu0.12.04.2).
>>> 
>>>  I do not know the difference comes from the openjdk version difference 
> at the 
>>>  moment.
>>> 
>>>  On ubuntu 12.04, one can use openjdk-7. I may try it tomorrow if I have 
> time.
>>> 
>>>  Tatsuro
>> 
>>  The origin of the FAIL in ov-java.cc-tst comes from openjdk-7 on ubuntu 32 
> bit.
>> 
>>  I have installed the openjdk-7 (it is not default for ubunut 12.04. For 
> 12.04,
>>  the openjdk-6 is default.)  and built octave against it .
>> 
>>>>  assert (javaMethod ("binarySearch", 
> "java.util.Arrays", [90 100 255], 255), 2);
>>  error: [java] java.lang.ClassCastException: java.lang.Double cannot be cast 
> to java.lang.Float
>>  error: evaluating argument list element number 1
>> 
>>  Of course, the modified test that you have shown is passed;
>>>>  assert (javaMethod ("binarySearch", 
> "java.util.Arrays",  single ([90 100 255]), single (255)), 2);
>>  I do not know why 32 bit version openjdk-7 changes the behavior from that 
> in openjdk-6.
>> 
>>  Tatsuro
>> 
> 
> Tatsuro,
> 
> You have collected a lot of good information about the bug.  Could you file
> a bug report at bugs.octave.org so that this information does not get lost?
> 
> I think it will require someone very familiar with Octave's Java interface
> to work through this, but at least it is narrowed down to 32-bit
> architectures running openjdk-7.
> 
> --Rik


I have filed the issue to the bug tracker.

https://savannah.gnu.org/bugs/?45264


Further discussion on this item will be done the above the tracker.

Tatsuro