dsage with @parallel doesn't work at all

[williamstein]

I tried to use dsage with the @parallel directory and sage-3.4, and it's 100% broken. The log just spews forever:

2009-04-16 18:25:05-0700 [-] [Worker: 0] Restarting...
2009-04-16 18:25:05-0700 [-] [Worker 0] Started...
2009-04-16 18:25:05-0700 [-] [Worker 1] Job vISI9r9Dzs failed!
2009-04-16 18:25:05-0700 [-] Traceback: 
         execfile('/scratch/wstein/sage/dsage/tmp_worker_files/vISI9r9Dzs/f.py')
        re
        Traceback (most recent call last):
          File "<stdin>", line 1, in <module>
          File "/scratch/wstein/sage/dsage/tmp_worker_files/vISI9r9Dzs/f.py", line 8, in <module>
            f = unpickle_function(p_f)
        NameError: name 'p_f' is not defined

2009-04-16 18:25:05-0700 [-] [Worker: 1] Restarting...
2009-04-16 18:25:05-0700 [-] [Worker 1] Started...
2009-04-16 18:25:05-0700 [Broker,client] [Worker 0] Starting job 5pzNNCImcd 
2009-04-16 18:25:05-0700 [Broker,client] [Worker 1] Starting job vISI9r9Dzs 

Using @parallel and multiprocessing for what I want to do (just some simple no-pexpect C library stuff involving modular symbols) doesn't work either, since I get weird pari_trap error exceptions:

Exception in thread Thread-6:
Traceback (most recent call last):
  File "/home/wstein/sage/local/lib/python2.5/threading.py", line 486, in __bootstrap_inner
    self.run()
  File "/home/wstein/sage/local/lib/python2.5/threading.py", line 446, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/wstein/sage/local/lib/python2.5/site-packages/processing/pool.py", line 232, in _handleResults
    for job, i, obj in iter(get, None):
  File "/home/wstein/sage/local/lib/python2.5/site-packages/sage/libs/pari/gen_py.py", line 59, in pari
    return gen.pari(x)
  File "gen.pyx", line 9125, in sage.libs.pari.gen._pari_trap (sage/libs/pari/gen.c:39083)
PariError:  (7)

It is so sad, that after all these years and all this work to write code to run things in parallel, that even the most trivial basic thing that I would like to do in parallel, which is evaluate a function on a bunch of integer inputs, still doesn't work robustly.

Component: dsage

Issue created by migration from https://trac.sagemath.org/ticket/5807

[williamstein]

comment:2

Note that dsage is so broken that it isn't even possible to test this out. See #7975.

[williamstein]

comment:3

Dsage is now deprecated.