Re: [Eric] Debugger (no connection)

Sat, 13 Sep 2008 07:15:29 -0700 

Hi,

I figured out the problem:
In DebugServer.__init__(), the self.listen(hostAddress) fails (returns false). Also self.isListening() returns false. If I replace it with just self.listen(), it works. hostAddress.toString() returns PyQt4.QtCore.QString(u'FE80:0:0:0:0:0:0:1'). I also checked self.errorString() after it failed and it returns PyQt4.QtCore.QString(u'The address is not available'). It seems that hostAddress is somehow wrong. I checked the preferences of Eric and under General debugger settings, Network interface, "Only selected interface" is activated there and the lo0-interface is selected (that it the loopback-device under MacOSX). When I just switch to "All network interfaces" there, it also works. It seems that Eric takes somehow the wrong hostAddress out of it.
For now, it is not that important to bind Eric only on the loopback- device, I am mot of the time in a secure network anyway. But do you have idea how to fix that in future? 

Regards,
Albert


Am 13.09.2008 um 15:43 schrieb Detlev Offenbach:


Hi,
I don't have any Mac OS X around here, so eric4 is untested (at least by me) 
on that platform. However, I will assist you in debugging the problem.
1) Please check in the debug client, which address and port it is given by the 
debug server. Insert a print statement in the main() method and print
sys.argv.
2) You may change the debug server to passive mode using the configuration 
dialog and connect the client manually tp port 42424 (the default).
3) If your system is using only IPv6, the call in line 960 may fail because DebugAddress is assigned the localhost IP 127.0.0.1 (IPv4). It is defined on line 11 in DebugProtocol.py. If you're using IPv6, try changing it to "::1". 

Regards,
Detlev

On Samstag, 13. September 2008, Albert Zeyer wrote:

Hi,

I am new to Eric but I like the IDE as far as I have explored it. I
though have some problems.

My environment: Eric 4.2.1 (r2426) on MacOSX with Python 2.5.1.

The problem: The debugger stopped working. (I think it has worked at
the very beginning, at least I cannot remember that I have seen the
error message there.) The first thing after I start the IDE is the
following message in the Log-viewer:

Traceback (most recent call last):
File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClient.py", line 38, in <module>
debugClient.main()
File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 1858, in main
self.connectDebugger(port, remoteAddress, redirect)
File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 960, in connectDebugger
sock.connect((DebugAddress,port))
File "<string>", line 1, in connect
socket.error: (49, "Can't assign requested address")

I also get the same message in the Shell:

StdErr: Traceback (most recent call last):
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClient.py", line 38, in <module>
    debugClient.main()
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 1858, in main
    self.connectDebugger(port, remoteAddress, redirect)
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 960, in connectDebugger
    sock.connect((DebugAddress,port))
  File "<string>", line 1, in connect
socket.error: (49, "Can't assign requested address")

This comes right after the start. But also when I try to debug any
script, I get this message again and the debugger also seems not to
work.

I browsed a bit through the code of Eric4 to understand the debugging
system. It seems that the IDE is starting a debug-server (the
DebugServer class) which is built into the IDE and then it starts an
external Python tool, the DebugClient, which connects over a TCP port
to the DebugServer. The DebugServer provides all debugging functions
and the DebugClient controls that.
I wondered now a bit about the message from DebugClient. "Can't assign 
requested address" normally only appears if you used a invalid port
number, like 0. On all other ports, it should give the message
"Connection refused". I also tried that myself:

Macintosh:~ az$ python /Library/Python/2.5/site-packages/eric4/
DebugClients/Python/DebugClient.py 1
Traceback (most recent call last):
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClient.py", line 38, in <module>
    debugClient.main()
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 1858, in main
    self.connectDebugger(port, remoteAddress, redirect)
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 960, in connectDebugger
    sock.connect((DebugAddress,port))
  File "<string>", line 1, in connect
socket.error: (61, 'Connection refused')

And:

Macintosh:~ az$ python /Library/Python/2.5/site-packages/eric4/
DebugClients/Python/DebugClient.py 0
Traceback (most recent call last):
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClient.py", line 38, in <module>
    debugClient.main()
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 1858, in main
    self.connectDebugger(port, remoteAddress, redirect)
  File "/Library/Python/2.5/site-packages/eric4/DebugClients/Python/
DebugClientBase.py", line 960, in connectDebugger
    sock.connect((DebugAddress,port))
  File "<string>", line 1, in connect
socket.error: (49, "Can't assign requested address")

Then, to go further, I tried to figure out on which port the server
was listening. I browsed through the code and it seems that the server 
just uses a random port (it does not specify that). I thought I
perhaps try out to connect to that port manually with the DebugClient. But it seems that the server was not correctly started, because Python 
has not opened any port:

Macintosh:~ az$ lsof -i -P | grep -i python
Python    24119   az    8u  IPv6 0x3e524bc      0t0  TCP *:* (CLOSED)

Any suggestions?

Thanks,
Albert

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Detlev Offenbach
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