[Bluej-discuss] re: FINAL followup: OS X Panther & BlueJ problems

[gkar at mac]

I don't know what the root cause of this is, but here is the solution I
found - disconnect myself from the network at work. More to the point, I
turned off airport.

Ever since upgrading to Panther I've fought this problem. I could work in
BlueJ at work up to the point when I'd want to create an object. But when I
tried to create an object...nada. But if I went home I could create an
image! Just realizing that at work it didn't work but at home it did took a
while.

Turning off my computer's firewall does nothing. Turning off Little Snitch
does nothing. I cannot turn off the proxy server (Oh how I wish I could!).
But cutting off my network access altogether does solve the problem.

david

> Ahaaa - you really may be on to something.
> 
> BlueJ does not access the internet, but it uses tcp socket
> communication on a non-standard port to communicate between the
> environment and the user code virtual machine.
> 
> Now, if you have an over-zealous firewall that blocks (almost) all tcp
> ports, this could make it fail (even though the access comes from
> localhost).
> 
> Try (just temporarily for testing) to switch off the firewall (if you
> can) and see whether this makes a difference. If it is, see whether you
> can allow access from localhost in the firewall. Otherwise you have to
> open a certain port - I'll have to look up which one we use - Andrew,
> Kasper: do you know of the top of your heads?
> 
> Michael
> 
> On 12 Dec 2003, at 17:18, gkar at mac wrote:
> 
>> I think I may be on to something. Last night I downloaded BlueJ 1.35
>> at home
>> and decided for the heck of it that I'd also install it on my
>> PowerBook.
>> Maybe this new version fixed the problem, right? Well it worked - I
>> could
>> create an object and work on a lesson in comfort. But I got to work
>> this
>> morning and once again I cannot create an object. What the????
>> 
>> But here's the interesting thing. When I tried to create the object I
>> got a
>> pop-up from Little Snitch saying the program was trying to access the
>> network. So, why does BlueJ try to access the internet and why might
>> that be
>> causing the problem? Note: I'm behind a proxy-server at work but not at
>> home.
>> 
>> Any thoughts?
>> david
>> 
>> 
>> On 12/2/03 1:18 PM, "gkar at mac" <gkar at mac.com> wrote:
>> 
>>> On 12/2/03 10:46 AM, "Michael Kölling" <mik at mip.sdu.dk> wrote:
>>> 
>>>> On 7 Nov 2003, at 16:43, gkar at mac wrote:
>>>> 
>>>>>> Could you please check the console (Applications/Utilities/Console)
>>>>>> for
>>>>>> any error messages?
>>>>>> 
>>>>>> Thanks,
>>>>>> 
>>>>>> Michael
>>>>>> 
>>>>> I set a mark right before launching BlueJ and from that time until
>>>>> the
>>>>> point
>>>>> when no object was instantiated, there was nothing logged.
>>>>> 
>>>> What's your computer's name? Does it contain spaces or punctuation
>>>> characters? If so, try removing them.
>>>> 
>>> The name is PBG4 (unimaginative but descriptive) so that isn't it.
>>> After the
>>> problem developed I was able to use BlueJ normally for a few hours
>>> but now I'm
>>> back to square one. I thought that shutting down and restarting had
>>> solve it
>>> but that wasn't it at all.
>>> 
>>> david
>>> 
>>> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>>> One ring to rule them all, one ring to find them
>>> One ring to bring them all and in the darkness bind them.
>>> 
>>> gkar at mac.com
>> 
>> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>> One ring to rule them all, one ring to find them
>> One ring to bring them all and in the darkness bind them.
>> 
>> gkar at mac.com
>> 
>> 
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-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
One ring to rule them all, one ring to find them
One ring to bring them all and in the darkness bind them.

gkar at mac.com