Unable to set TIMEOUT for ldap in Python 2.7

Question

I'd like to setup a "timeout" for the ldap library (python-ldap-2.4.15-2.el7.x86_64) and python 2.7

I'm forcing my /etc/hosts to resolve an non existing IP address in order to raise the timeout.

I've followed several examples and took a look at the documentation or questions like this one without luck.

By now I've tried forcing global timeouts before the initialize:

ldap.set_option(ldap.OPT_NETWORK_TIMEOUT, 1)
ldap.set_option(ldap.OPT_TIMEOUT, 1)
ldap.protocol_version=ldap.VERSION3

Forced the same values at object level:

ldap_obj = ldap.initialize("ldap://%s:389" % LDAPSERVER ,trace_level=9)
ldap_obj.set_option(ldap.OPT_NETWORK_TIMEOUT, 1)
ldap_obj.set_option(ldap.OPT_TIMEOUT, 1)

I've also tried with:

ldap.network_timeout = 1
ldap.timelimit = 1

And used both methods, search and search_st (The synchronous form with timeout)

Finally this is the code:

def testLDAPConex( LDAPSERVER ) :
    """
    Check ldap
    """
    ldap.set_option(ldap.OPT_NETWORK_TIMEOUT, 1)
    ldap.set_option(ldap.OPT_TIMEOUT, 1)
    ldap.protocol_version=ldap.VERSION3
    ldap.network_timeout = 1
    ldap.timelimit = 1
    try:
        ldap_obj = ldap.initialize("ldap://%s:389" % LDAPSERVER ,trace_level=9)
        ldap_result_id = ldap_obj.search("ou=people,c=this,o=place", ldap.SCOPE_SUBTREE, "cn=user")

I've printed the constants of the object OPT_NETWORK_TIMEOUT and OPT_TIMEOUT, the values were assigned correctly.

The execution time is 56s everytime and I'm not able to control the amount of seconds for the timeout.

Btw, the same code in python3 does work as intended:

real    0m10,094s
user    0m0,072s
sys 0m0,013s

score 1 · Answer 1 · answered Oct 28 '20 at 15:51

After some testing I've decided to rollback the VM to a previous state.

The Networking Team were doing changes across the network configuration, that might have changed the behaviour over the interface and some kind of bug when the packages were being sent over the wire in:

ldap_result_id = ldap_obj.search("ou=people,c=this,o=place", ldap.SCOPE_SUBTREE, "cn=user")

After restoring the VM, which included a restart, the error of not being able to reach LDAP raises as expected.

Unable to set TIMEOUT for ldap in Python 2.7

1 Answers1