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LDAP authentication timing out

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Hello All,

I have the following config:

host    samerole        +myrole         samenet            ldap ldapserver="ldap1,ldap2,ldap3" ldapbinddn="mybinddn" ldapbindpasswd="mypass" ldapbasedn="mybase" ldapsearchattribute="myatt"

Usually auth works perfectly with LDAP (starting a session from psql using an LDAP connection, authenticating with the LDAP password then exiting straight away) I see this: 

2013-06-20 15:19:53 EST DEBUG:  edb-postgres child[15901]: starting with (
2013-06-20 15:19:53 EST DEBUG:  forked new backend, pid=15901 socket=10
2013-06-20 15:19:53 EST DEBUG:          edb-postgres
2013-06-20 15:19:53 EST DEBUG:          dccn
2013-06-20 15:19:53 EST DEBUG:  )
2013-06-20 15:19:53 EST DEBUG:  InitPostgres
2013-06-20 15:19:53 EST DEBUG:  my backend ID is 1
2013-06-20 15:19:53 EST DEBUG:  StartTransaction
2013-06-20 15:19:53 EST DEBUG:  name: unnamed; blockState:       DEFAULT; state: INPROGR, xid/subid/cid: 0/1/0, nestlvl: 1, children:
2013-06-20 15:19:53 EST DEBUG:  received password packet
2013-06-20 15:19:53 EST DEBUG:  CommitTransaction
2013-06-20 15:19:53 EST DEBUG:  name: unnamed; blockState:       STARTED; state: INPROGR, xid/subid/cid: 0/1/0, nestlvl: 1, children:
2013-06-20 15:19:56 EST DEBUG:  shmem_exit(0): 7 callbacks to make
2013-06-20 15:19:56 EST DEBUG:  proc_exit(0): 3 callbacks to make
2013-06-20 15:19:56 EST DEBUG:  exit(0)
2013-06-20 15:19:56 EST DEBUG:  shmem_exit(-1): 0 callbacks to make
2013-06-20 15:19:56 EST DEBUG:  proc_exit(-1): 0 callbacks to make
2013-06-20 15:19:56 EST DEBUG:  reaping dead processes
2013-06-20 15:19:56 EST DEBUG:  server process (PID 15901) exited with exit code 0

However around 10% of the time (although this varies) the session hangs after I type in my password till the auth timeout and I see this:

2013-06-20 15:07:46 EST DEBUG:  forked new backend, pid=15587 socket=10
2013-06-20 15:07:46 EST DEBUG:  edb-postgres child[15587]: starting with (
2013-06-20 15:07:46 EST DEBUG:          edb-postgres
2013-06-20 15:07:46 EST DEBUG:          dccn
2013-06-20 15:07:46 EST DEBUG:  )
2013-06-20 15:07:46 EST DEBUG:  InitPostgres
2013-06-20 15:07:46 EST DEBUG:  my backend ID is 1
2013-06-20 15:07:46 EST DEBUG:  StartTransaction
2013-06-20 15:07:46 EST DEBUG:  name: unnamed; blockState:       DEFAULT; state: INPROGR, xid/subid/cid: 0/1/0, nestlvl: 1, children:
2013-06-20 15:07:46 EST DEBUG:  received password packet
2013-06-20 15:08:46 EST DEBUG:  shmem_exit(1): 7 callbacks to make
2013-06-20 15:08:46 EST DEBUG:  proc_exit(1): 3 callbacks to make
2013-06-20 15:08:46 EST DEBUG:  exit(1)
2013-06-20 15:08:46 EST DEBUG:  shmem_exit(-1): 0 callbacks to make
2013-06-20 15:08:46 EST DEBUG:  proc_exit(-1): 0 callbacks to make
2013-06-20 15:08:46 EST DEBUG:  reaping dead processes
2013-06-20 15:08:46 EST DEBUG:  server process (PID 15587) exited with exit code 1

Anyone have any ideas? I never see this with MD5.

I can multiple quickfire binds from an LDAP application and the same bind DN with no problems.

Cheers,

James Sewell
PostgreSQL Team Lead / Solutions Architect

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