[GE users] python-drmaa: unable to send message to qmaster using port 6444

reuti reuti at staff.uni-marburg.de
Wed Dec 15 12:08:51 GMT 2010


Hi,

Am 15.12.2010 um 10:55 schrieb sriedel:

> I've posted the following yesterday in the dev mailinglist, but perhaps it fits in better here.
> 
> I installed sge6.1u6 on an Ubuntu host lately. Using the commandline interface everything works fine. I've installed the sge_master and the sge_execd on the same host. 

when you just installed it: why such an old version?


> Now I wanted to include the DRMAA in a Python project I'm working on, but I can't get the python-drmaa to connect to the qmaster. To use the DRMAA 
> I've downloaded the newest source from the DRMAA page and installed it with the usual build/install routine.

I never used the Python interface - can you check with one of the DRMAA C examples, whether it's working in general?

-- Reuti


> Here's the code I'm using (it's pretty much the same as in the example1.py in the python-drmaa source):
> >>> import drmaa
> >>> s=drmaa.Session()
> >>> s.initialize()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/local/lib/python2.6/dist-packages/drmaa-0.4b3-py2.6.egg/drmaa/__init__.py", line 274, in initialize
>     _w.init(contactString)
>   File "/usr/local/lib/python2.6/dist-packages/drmaa-0.4b3-py2.6.egg/drmaa/wrappers.py", line 59, in init
>     return _lib.drmaa_init(contact, error_buffer, sizeof(error_buffer))
>   File "/usr/local/lib/python2.6/dist-packages/drmaa-0.4b3-py2.6.egg/drmaa/errors.py", line 90, in error_check
>     raise _ERRORS[code-1]("code %s: %s" % (code, error_buffer.value))
> drmaa.errors.DrmCommunicationException: code 2: unable to send message to qmaster using port 6444 on host "ubuntu": got send error
> 
> I can't figure it out, why it fails.
> 
> All the need processes are running:
> root at ubuntu:~# ps -ax | grep sge
> Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
>  7600 ?        Sl     0:03 /opt/sge6.2/bin/lx24-x86/sge_qmaster
>  7619 ?        Sl     0:01 /opt/sge6.2/bin/lx24-x86/sge_schedd
>  7678 ?        S      0:00 /opt/sge6.2/bin/lx24-x86/sge_execd
> 
> I've also checked the port:
> root at ubuntu:~# qping ubuntu 6444 qmaster 1
> 12/14/2010 17:33:15 endpoint ubuntu/qmaster/1 at port 6444 is up since 8643 seconds
> 
> nmap says it's open, as well (x-ed out my IP here):
> root at ubuntu:~# nmap -p 6444 ubuntu
> 
> Starting Nmap 5.21 ( http://nmap.org ) at 2010-12-14 17:34 CET
> Nmap scan report for ubuntu (141.52.xxx.xxx)
> Host is up (0.000055s latency).
> PORT     STATE SERVICE
> 6444/tcp open  unknown
> 
> And my hostname is resolved in /etc/hosts (and set to my IP address)
> 
> Am I missing something here? Does anybody have a clue, what might be the problem?
> Any help?
> 
> Regards,
> Stephan

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