Hi Anton,
Thanks for your reply.
Backtrace of the blocked thread is as follows:
# ChildEBP RetAddr Args to Child
00 03ac83bc 7c59a072 00000304 00000000 00000000
ntdll!ZwWaitForSingleObject+0xb (FPO: [3,0,0])
01 03ac83e4 7c57b3e9 00000304 ffffffff 00000000
KERNEL32!WaitForSingleObjectEx+0x71 (FPO: [Non-Fpo])
02 03ac83f4 30036d02 00000304 ffffffff 0137d9de
KERNEL32!WaitForSingleObject+0xf (FPO: [2,0,0])
03 03ac841c 30038399 0229ae50 ffffffff 00000001
libobnspr4!_PR_MD_WAIT(struct PRThread * thread = 0x0229ae50, unsigned
int ticks = 0xffffffff)+0x72 (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\md\windows\ntio.c
@ 528]
04 03ac8430 30039c71 0229ae50 ffffffff 0229ae50
libobnspr4!_NT_IO_WAIT(struct PRThread * thread = 0x0229ae50, unsigned
int timeout = 0xffffffff)+0xe9 (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\md\windows\ntio.c
@ 743]
05 03ac8454 30026cac 04a70138 04b2377c 00000005
libobnspr4!_PR_MD_RECV(struct PRFileDesc * fd = 0x04a70138, void * buf
= 0x04b2377c, int amount = 5, int flags = 0, unsigned int timeout =
0xffffffff)+0x2f1 (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\md\windows\ntio.c
@ 1756]
06 03ac847c 30008286 04a70138 04b2377c 00000005
libobnspr4!SocketRecv(struct PRFileDesc * fd = 0x04a70138, void * buf =
0x04b2377c, int amount = 5, int flags = 0, unsigned int timeout =
0xffffffff)+0x27c (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\io\prsocket.c
@ 638]
07 03ac8498 0137d935 04b23a70 04b2377c 00000005
libobnspr4!pl_DefRecv(struct PRFileDesc * fd = 0x04b23a70, void * buf =
0x04b2377c, int amount = 5, int flags = 0, unsigned int timeout =
0xffffffff)+0x66 (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\io\prlayer.c
@ 277]
08 03ac84c0 01374e70 04b23598 04b2377c 00000005
obssl3!ssl_DefRecv(struct sslSocketStr * ss = 0x04b23598, unsigned char
* buf = 0x04b2377c "", int len = 5, int flags = 0)+0x33 (FPO:
[Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\ssldef.c
@ 91]
09 03ac84f4 01374cad 04b23598 04b2373c 00000000
obssl3!ssl3_GatherData(struct sslSocketStr * ss = 0x04b23598, struct
sslGatherStr * gs = 0x04b2373c, int flags = 0)+0xf6 (FPO: [Non-Fpo])
(CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\ssl3gthr.c
@ 87]
0a 03ac8518 01375fb5 04b23598 00000000 04b23598
obssl3!ssl3_GatherCompleteHandshake(struct sslSocketStr * ss =
0x04b23598, int flags = 0)+0x4d (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\ssl3gthr.c
@ 192]
0b 03ac852c 0138008f 04b23598 00000000 00000001
obssl3!ssl_GatherRecord1stHandshake(struct sslSocketStr * ss =
0x04b23598)+0x62 (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\sslcon.c
@ 1256]
0c 03ac8540 013818e2 04b23598 00000000 03ac8570
obssl3!ssl_Do1stHandshake(struct sslSocketStr * ss = 0x04b23598)+0x1ef
(FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\sslsecur.c
@ 145]
0d 03ac8550 0138730b 04b23598 04b18504 0000002c
obssl3!ssl_SecureSend(struct sslSocketStr * ss = 0x04b23598, unsigned
char * buf = 0x04b18504 "0*???", int len = 44, int flags = 0)+0x184
(FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\sslsecur.c
@ 1024]
0e 03ac8570 300063bf 04b14928 04b18504 0000002c obssl3!ssl_Send(struct
PRFileDesc * fd = 0x04b14928, void * buf = 0x04b18504, int len = 44,
int flags = 0, unsigned int timeout = 0xffffffff)+0xa5 (FPO: [Non-Fpo])
(CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\security\nss\lib\ssl\sslsock.c
@ 1222]
0f 03ac858c 00281562 04b14928 04b18504 0000002c
libobnspr4!PR_Send(struct PRFileDesc * fd = 0x04b14928, void * buf =
0x04b18504, int amount = 44, int flags = 0, unsigned int timeout =
0xffffffff)+0x1f (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\nsprpub\pr\src\io\priometh.c
@ 221]
10 03ac85ac 10030e45 00000001 04b18504 0000002c
OBNSLDAPPR32V50!prldap_write(int s = 1, void * buf = 0x04b18504, int
len = 44, struct lextiof_socket_private * socketarg = 0x04b18930)+0x32
(FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libprldap\ldappr-io.c
@ 210]
11 03ac8628 1001be5c 04a6ff60 04b183e0 00000000
OBNSLDAP32V50!ber_flush(struct sockbuf * sb = 0x04a6ff60, struct
berelement * ber = 0x04b183e0, int freeit = 0)+0x205 (FPO: [Non-Fpo])
(CONV: stdcall)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\liblber\io.c
@ 417]
12 03ac8650 1001b676 04a6fd80 04a6ff60 04b183e0
OBNSLDAP32V50!nsldapi_send_ber_message(struct ldap * ld = 0x04a6fd80,
struct sockbuf * sb = 0x04a6ff60, struct berelement * ber = 0x04b183e0,
int freeit = 0)+0x6c (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libldap\request.c
@ 399]
13 03ac8880 1001aabf 04a6fd80 04b183e0 00000001
OBNSLDAP32V50!nsldapi_send_server_request(struct ldap * ld =
0x04a6fd80, struct berelement * ber = 0x04b183e0, int msgid = 1, struct
ldapreq * parentreq = 0x00000000, struct ldap_server * srvlist =
0x00000000, struct ldap_conn * lc = 0x04b281c0, char * bindreqdn =
0x04b23b78 "cn=Directory Manager", int bind = 0)+0xb86 (FPO: [Non-Fpo])
(CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libldap\request.c
@ 334]
14 03ac89b0 1002442b 04a6fd80 00000001 00000060
OBNSLDAP32V50!nsldapi_send_initial_request(struct ldap * ld =
0x04a6fd80, int msgid = 1, unsigned long msgtype = 0x60, char * dn =
0x04b27ca8 "cn=Directory Manager", struct berelement * ber =
0x04b183e0)+0x6f (FPO: [Non-Fpo]) (CONV: cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libldap\request.c
@ 148]
15 03ac89e4 10023fdd 04a6fd80 04b27ca8 04b27cf0
OBNSLDAP32V50!simple_bind_nolock(struct ldap * ld = 0x04a6fd80, char *
dn = 0x04b27ca8 "cn=Directory Manager", char * passwd = 0x04b27cf0
"oblixoblix", int unlock_permitted = 1)+0x41b (FPO: [Non-Fpo]) (CONV:
cdecl)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libldap\sbind.c
@ 150]
16 03ac8b04 006cd518 04a6fd80 04b27ca8 04b27cf0
OBNSLDAP32V50!ldap_simple_bind(struct ldap * ld = 0x04a6fd80, char * dn
= 0x04b27ca8 "cn=Directory Manager", char * passwd = 0x04b27cf0
"oblixoblix")+0x5d (FPO: [Non-Fpo]) (CONV: stdcall)
[j:\sdk\mozilla\source\mozilla_new_home\ldapsdkcode\mozilla\directory\c-sdk\ldap\libraries\libldap\sbind.c
@ 79]
17 03aca728 006ec1c1 04a6fd80 02292050 02292164
ois_server_d!LDAPSimpleBind(struct ldap * masterHandle = 0x04a6fd80,
char * login = 0x02292050 "cn=Directory Manager", char * passwd =
0x02292164 "oblixoblix")+0x352 (FPO: [Non-Fpo]) (CONV: cdecl)
[d:\p4\coreid\np_common\db\ldap\util\ldap_util3.cpp @ 504]
18 03acd2cc 00b3cef7 04a6fd80 02292050 02292164
ois_server_d!LDAPAsyncSimpleBind(struct ldap * ld = 0x04a6fd80, char *
login = 0x02292050 "cn=Directory Manager", char * passwd = 0x02292164
"oblixoblix", struct ldapcontrol *** serverCtrls = 0x00000000, long
timeout = -2)+0x13e (FPO: [Non-Fpo]) (CONV: cdecl)
[d:\p4\coreid\np_common\db\ldap\util\ldap_util3.cpp @ 2968]
19 03ade454 005e301c 00000000 03adfb74 03ade878
ois_server_d!LDAPConnectionManager::_CreateAndOpenConnection(bool
bSetup = false)+0x4b27 (FPO: [Non-Fpo]) (CONV: thiscall)
[d:\p4\coreid\np_common\db\connection\ldap\ldap_connection_mngr.cpp @
384]
1a 03ade870 005e729a 03adff78 cccccccc 0382ef80
ois_server_d!DBConnectionManager::PollLDAPServer(void)+0x6d (FPO:
[Non-Fpo]) (CONV: thiscall)
[d:\p4\coreid\np_common\db\utils\db_connection_mngr.cpp @ 482]
1b 03adfb84 005e6366 cccccccc cccccccc 0382ef80
ois_server_d!ConnectionWatcherThread::DoHeartBeat(void)+0x35a (FPO:
[Non-Fpo]) (CONV: thiscall)
[d:\p4\coreid\np_common\db\utils\db_failover.cpp @ 614]
1c 03adff88 0041919b cccccccc cccccccc 0382ef80
ois_server_d!ConnectionWatcherThread::Run(void)+0x232 (FPO: [Non-Fpo])
(CONV: thiscall) [d:\p4\coreid\np_common\db\utils\db_failover.cpp @
406]
1d 03adffb4 7c57b396 0382ef80 cccccccc cccccccc
ois_server_d!ObThread::ThreadFunc(void * arg = 0x0382ef80)+0x5d (FPO:
[Non-Fpo]) (CONV: stdcall)
[d:\p4\coreid\np_common\util\base\obthread.cpp @ 736]
Can you infer any information from the above?
As per my understanding, the LDAP_X_OPT_CONNECT_TIMEOUT parameter in
LDAP connection handle is used by LDAP server, but not by LDAP client
(Mozilla C SDK). So, Mozilla SDK client should return from the
asynchronous request made (it should not block), irrespective of
LDAP_X_OPT_CONNECT_TIMEOUT parameter in connection handle.
Thanks again in advance,
Ramakrishna.
------------------------------
Anton Bobrov wrote:
you gonna have to elaborate on "hang/block" thing ie if you attach
debugger to it and do a backtrace where is it at ? do you set any
timeout values properly like LDAP_X_OPT_CONNECT_TIMEOUT etc ?
RamaKrishna Narla wrote:
Hi,
We are using Mozilla LDAP C SDK 5.12 in our application. We are
currently switching from synchronous calls to asynchronous calls.
When Directory Server hangs, it is known that clients using synchronous
calls like ldap_simple_bind_s will hang/block in LDAP SDK calls.
Ideally, this should not be the behavior with the asynchronous calls
like ldap_simple_bind.
But, we are observing that when Directory Server hangs, our application
is blocking in ldap_simple_bind call when connection used is in SSL
mode.
Also note that, in the same scenario, our application is not blocking
when connection is in Open mode.
Is anybody observed such a behavior? Any insights on this problem are
welcome.
Thanks in advance,
Ramakrishna.
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