[issue10878] asyncore does not react properly on close()

[Teodor Georgiev]

Teodor Georgiev <lv_tokata at yahoo.com> added the comment:

Precisely, I traced down the problem by putting a simple "breakpoint"
in asyncore.py:

def poll(timeout=0.0, map=None):
    if map is None:
        map = socket_map
    if map:
        r = []; w = []; e = []
        for fd, obj in map.items():
            is_r = obj.readable()
            print "Readable??? -->" , is_r
            is_w = obj.writable()
            if is_r:
                r.append(fd)
            if is_w:
                w.append(fd)
            if is_r or is_w:
                e.append(fd)
        if [] == r == w == e:
            time.sleep(timeout)
            return

        print r,w,e
try:
            r, w, e = select.select(r, w, e, timeout)
        except select.error, err:
            if err.args[0] != EINTR:
                raise
            else:
                return



And here it comes:

[5] [5] [5]
Readable??? --> True
[5] [5] [5]
Readable??? --> True
[5] [5] [5]
Readable??? --> False
[] [5] [5]

Traceback (most recent call last):
  File "./dlms_client.py", line 136, in <module>
    asyncore.loop(timeout=0.8)
  File "/usr/lib/python2.6/asyncore.py", line 213, in loop
    poll_fun(timeout)
  File "/usr/lib/python2.6/asyncore.py", line 146, in poll
    raise
  File "/usr/lib/python2.6/asyncore.py", line 143, in poll
    r, w, e = select.select(r, w, e, timeout)
select.error: (9, 'Bad file descriptor')

So, in order this to work, on first sight all r,w,e must not point to
a socket that has been already closed. Now I am going to think for a workaround at least.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10878>
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