I want to create a thread which performs an SNMP walk, but the main thread
blocks on the pending request too.
I attach the source code of the test i wrote.
The main thread prints on standard output every second.
A second thread performs a walk.
The main threads blocks until the snmp walk is finished
Is it a bug?
How can avoid this problem? Is this a problem of the python bindings or
what else?
Thank you very much.
TRY
===
$ python netsnmp_thread.py <your host> 1.3.6.1.2.1.1.1
SOURCE CODE
==========
import time,sys
import netsnmp
import threading
if len(sys.argv) != 3:
print "Usage: python %s <host> <oid>" % (sys.argv[0])
sys.exit(-1)
host = sys.argv[1]
oid_table = sys.argv[2]
TIMEOUT=1000000
RETRIES=10
class TestThread(threading.Thread):
def __init__(self, oid):
super(TestThread, self).__init__() self.oid = oid
def run(self):
print "THREAD: start"
start = time.time()
var = netsnmp.Varbind( '.' + self.oid )
varlist = netsnmp.VarList( var )
t = netsnmp.snmpwalk( varlist , Version=1, DestHost=host,
Community='public',
Version=2,
UseNumeric=1,
Timeout=TIMEOUT, Retries=RETRIES)
end = time.time()
print "THREAD: request time %s" % (end-start)
if t != None:
for a in varlist:
print '%s.%s = %s (%s, %s)' % (a.tag, str(a.iid),
str(a.val), str(a.type), type(a.val))
else:
print "no result"
print "THREAD: finish!"
t = TestThread(oid_table)
last = time.time()
print "main thread..."
t.start()
while True:
now = time.time()
print "main thread going idle...elapsed=%s" % (now-last)
last = now
time.sleep(1.0)
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