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• 10-09-2007, 6:56 PM

  shp1979 Joined on 10-09-2007, 6:48 PM Posts 5

  LDAP IIS 6 Problem Reply Contact Hi,  I am trying to query an LDAP server to fetch user password expiration details. We want to show a warning message if this user's password is about to expire. The application works fine for some time (varying from 5 - 6 login attempts to 25 -30 login attempts) and then w3wp starts consuming 25% of CPU and eventually stops responding to any request. In my code (C#), I am disposing all LDAP related objects in finally block. I have also added some timeouts (LDAP client and server timeouts) to make sure that application won’t wait if the LDAP server is not responding in a reasonable time. I also tried to run iisstate to see what all threads are running but couldn’t identify anything significant from that information ( I don’t have good knowledge of how to debug stack trace information generated by the iisstate). So, right now I have no clue about what is going wrong.   I checked the threads that were running in w3wp process when it started consuming 25% CPU time. There was one thread msvcrt.dll!endthread that was eating up 25% CPU time. I am not sure what this thread does. I also saw couple of other threads like ntdll.dll! RtlOpenCurrentUser and I am not sure how/whether they are related. I wonder if anyone can help to understand what are msvcrt.dll ntdll.dll and w3tp.dl processes and how they are used by w3wp( if they are used by w3wp process). What is RtlOpenCurrentUser in ntdll.dll I am sending the stack trace generated by iisstate. Please let me know if you figured out something from this trace.   ***********************  Symbol search path is: SRV*C:\iisstate\symbols*http://msdl.microsoft.com/download/symbols   Microsoft (R) Windows Debugger  Version 6.2.0013.1 Copyright (c) Microsoft Corporation. All rights reserved.   *** wait with pending attach Symbol search path is: SRV*C:\iisstate\symbols*http://msdl.microsoft.com/download/symbols Executable search path is: WARNING: Process 4532 is not attached as a debuggee          The process can be examined but debug events will not be received ......................................................................................................................................... The call to LoadLibrary(exts) failed, Win32 error 2     "The system cannot find the file specified." Please check your debugger configuration and/or network access. (11b4.774): Wake debugger - code 80000007 (first chance) Opened log file 'C:\iisstate\output\IISState-4532.log'   *********************** Starting new log output IISState version 3.3.1   Tue Oct 09 11:47:14 2007   OS = Windows 2003 Server Executable: w3wp.exe PID =  4532   Note: Thread times are formatted as HH:MM:SS.ms   ***********************         Thread ID: 0 System Thread ID: 774 Kernel Time: 0:0:0.31 User Time: 0:0:0.109 Thread Status: Thread is in a WAIT state. Thread Type: HTTP Compression Thread  # ChildEBP RetAddr  00 0006fc08 7c827d0b ntdll!KiFastSystemCallRet 01 0006fc0c 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 0006fc7c 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 0006fc90 5a364662 kernel32!WaitForSingleObject+0x12 04 0006fca0 5a366e3f w3dt!WP_CONTEXT::RunMainThreadLoop+0x10 05 0006fca8 5a3af42d w3dt!UlAtqStartListen+0x2d 06 0006fcb8 5a3bc335 w3core!W3_SERVER::StartListen+0xbd 07 0006ff0c 0100187c w3core!UlW3Start+0x26e 08 0006ff44 01001a27 w3wp!wmain+0x22a 09 0006ffc0 77e6f23b w3wp!wmainCRTStartup+0x12f 0a 0006fff0 00000000 kernel32!BaseProcessStart+0x23         Thread ID: 1 System Thread ID: 3a4 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: Other  # ChildEBP RetAddr  00 00ccff9c 7c826f4b ntdll!KiFastSystemCallRet 01 00ccffa0 7c83d424 ntdll!NtDelayExecution+0xc 02 00ccffb8 77e64829 ntdll!RtlpTimerThread+0x47 03 00ccffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 2 System Thread ID: 17f4 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: Other  # ChildEBP RetAddr  00 00d0ff70 7c8277db ntdll!KiFastSystemCallRet 01 00d0ff74 7c839f38 ntdll!ZwRemoveIoCompletion+0xc 02 00d0ffb8 77e64829 ntdll!RtlpWorkerThread+0x3d 03 00d0ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 3 System Thread ID: 1ab8 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: Possible ASP page.  Possible DCOM activity Executing Page: Unable to locate ASP page   No remote call being made    # ChildEBP RetAddr  00 00d7fe18 7c82783b ntdll!KiFastSystemCallRet 01 00d7fe1c 77c885ac ntdll!NtReplyWaitReceivePortEx+0xc 02 00d7ff84 77c88792 RPCRT4!LRPC_ADDRESS::ReceiveLotsaCalls+0x198 03 00d7ff8c 77c8872d RPCRT4!RecvLotsaCallsWrapper+0xd 04 00d7ffac 77c7b110 RPCRT4!BaseCachedThreadRoutine+0x9d 05 00d7ffb8 77e64829 RPCRT4!ThreadStartRoutine+0x1b 06 00d7ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 4 System Thread ID: 1aa0 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: HTTP Listener  # ChildEBP RetAddr  00 00f7ff24 7c8277db ntdll!KiFastSystemCallRet 01 00f7ff28 77e5bea2 ntdll!ZwRemoveIoCompletion+0xc 02 00f7ff54 5a30248e kernel32!GetQueuedCompletionStatus+0x29 03 00f7ff8c 5a3026ac W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x33 04 00f7ffa0 5a301da9 W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x24 05 00f7ffb8 77e64829 W3TP!THREAD_MANAGER::ThreadManagerThread+0x39 06 00f7ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 5 System Thread ID: b30 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: HTTP Listener  # ChildEBP RetAddr  00 00fbff24 7c8277db ntdll!KiFastSystemCallRet 01 00fbff28 77e5bea2 ntdll!ZwRemoveIoCompletion+0xc 02 00fbff54 5a30248e kernel32!GetQueuedCompletionStatus+0x29 03 00fbff8c 5a3026ac W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x33 04 00fbffa0 5a301da9 W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x24 05 00fbffb8 77e64829 W3TP!THREAD_MANAGER::ThreadManagerThread+0x39 06 00fbffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 6 System Thread ID: 1760 Kernel Time: 0:0:0.0 User Time: 0:0:0.15 Thread Type: HTTP Listener  # ChildEBP RetAddr  00 00ffff24 7c8277db ntdll!KiFastSystemCallRet 01 00ffff28 77e5bea2 ntdll!ZwRemoveIoCompletion+0xc 02 00ffff54 5a30248e kernel32!GetQueuedCompletionStatus+0x29 03 00ffff8c 5a3026ac W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x33 04 00ffffa0 5a301da9 W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x24 05 00ffffb8 77e64829 W3TP!THREAD_MANAGER::ThreadManagerThread+0x39 06 00ffffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 7 System Thread ID: 520 Kernel Time: 0:0:0.46 User Time: 0:0:0.0 Thread Type: HTTP Listener  # ChildEBP RetAddr  00 0104ff24 7c8277db ntdll!KiFastSystemCallRet 01 0104ff28 77e5bea2 ntdll!ZwRemoveIoCompletion+0xc 02 0104ff54 5a30248e kernel32!GetQueuedCompletionStatus+0x29 03 0104ff8c 5a3026ac W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x33 04 0104ffa0 5a301da9 W3TP!THREAD_POOL_DATA::ThreadPoolThread+0x24 05 0104ffb8 77e64829 W3TP!THREAD_MANAGER::ThreadManagerThread+0x39 06 0104ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 8 System Thread ID: b68 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: Other  # ChildEBP RetAddr  00 0110fcec 7c827cfb ntdll!KiFastSystemCallRet 01 0110fcf0 7c83c78e ntdll!NtWaitForMultipleObjects+0xc 02 0110ffb8 77e64829 ntdll!RtlpWaitThread+0x161 03 0110ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 9 System Thread ID: 220 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: HTTP Compression Thread  # ChildEBP RetAddr  00 01adfa84 7c827d0b ntdll!KiFastSystemCallRet 01 01adfa88 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 01adfaf8 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 01adfb0c 5a3b820f kernel32!WaitForSingleObject+0x12 04 01adffb8 77e64829 w3core!HTTP_COMPRESSION::CompressionThread+0x126 05 01adffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 10 System Thread ID: 1054 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: Possible ASP page.  Possible DCOM activity Executing Page: Unable to locate ASP page   No remote call being made    # ChildEBP RetAddr  00 01b1fe18 7c82783b ntdll!KiFastSystemCallRet 01 01b1fe1c 77c885ac ntdll!NtReplyWaitReceivePortEx+0xc 02 01b1ff84 77c88792 RPCRT4!LRPC_ADDRESS::ReceiveLotsaCalls+0x198 03 01b1ff8c 77c8872d RPCRT4!RecvLotsaCallsWrapper+0xd 04 01b1ffac 77c7b110 RPCRT4!BaseCachedThreadRoutine+0x9d 05 01b1ffb8 77e64829 RPCRT4!ThreadStartRoutine+0x1b 06 01b1ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 11 System Thread ID: 19ac Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Type: Other  # ChildEBP RetAddr  00 01b5ff8c 7c826f4b ntdll!KiFastSystemCallRet 01 01b5ff90 7c81943a ntdll!NtDelayExecution+0xc 02 01b5ffb8 77e64829 ntdll!RtlpIOWorkerThread+0x3f 03 01b5ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 12 System Thread ID: b24 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: ASP Executing Page: Unable to locate ASP page    # ChildEBP RetAddr  00 0275ff0c 7c827d0b ntdll!KiFastSystemCallRet 01 0275ff10 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 0275ff80 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 0275ff94 709fc803 kernel32!WaitForSingleObject+0x12 04 0275ffb4 709fc7db asp!CApplnCleanupMgr::ApplnCleanupDoWork+0x1e 05 0275ffb8 77e64829 asp!CApplnCleanupMgr::ApplnCleanupThread+0xa 06 0275ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 13 System Thread ID: 1d64 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: ASP Executing Page: Unable to locate ASP page    # ChildEBP RetAddr  00 02a1fe1c 7c827cfb ntdll!KiFastSystemCallRet 01 02a1fe20 77e6202c ntdll!NtWaitForMultipleObjects+0xc 02 02a1fec8 7739bbd1 kernel32!WaitForMultipleObjectsEx+0x11a 03 02a1ff24 7739ce36 USER32!RealMsgWaitForMultipleObjectsEx+0x141 04 02a1ff40 709fb8be USER32!MsgWaitForMultipleObjects+0x1f 05 02a1ff84 77bcb530 asp!CMTACallbackThread::Thread+0x4f 06 02a1ffb8 77e64829 msvcrt!_endthreadex+0xa3 07 02a1ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 14 System Thread ID: ba4 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: ASP Executing Page: Unable to locate ASP page    # ChildEBP RetAddr  00 0318fef4 7c827d0b ntdll!KiFastSystemCallRet 01 0318fef8 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 0318ff68 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 0318ff7c 709fe8ef kernel32!WaitForSingleObject+0x12 04 0318ffb8 77e64829 asp!CViperReqManager::WatchThread+0x68 05 0318ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 15 System Thread ID: 15e0 Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: Idle ASP thread  # ChildEBP RetAddr  00 0321fee8 7c827d0b ntdll!KiFastSystemCallRet 01 0321feec 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 0321ff5c 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 0321ff70 4a77921b kernel32!WaitForSingleObject+0x12 04 0321ff84 77bcb530 comsvcs!CSTAThreadPool::LoadBalanceThreadControlLoop+0x29 05 0321ffb8 77e64829 msvcrt!_endthreadex+0xa3 06 0321ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 16 System Thread ID: 156c Kernel Time: 0:0:0.0 User Time: 0:0:0.0 Thread Status: Thread is in a WAIT state. Thread Type: Idle ASP thread  # ChildEBP RetAddr  00 0325fee0 7c827d0b ntdll!KiFastSystemCallRet 01 0325fee4 77e61d1e ntdll!NtWaitForSingleObject+0xc 02 0325ff54 77e61c8d kernel32!WaitForSingleObjectEx+0xac 03 0325ff68 4a778cb6 kernel32!WaitForSingleObject+0x12 04 0325ff84 77bcb530 comsvcs!CSTAThreadPool::KillThreadControlLoop+0x25 05 0325ffb8 77e64829 msvcrt!_endthreadex+0xa3 06 0325ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 17 System Thread ID: f2c Kernel Time: 0:0:0.78 User Time: 0:0:0.328 Thread Status: Thread is in a WAIT state. Thread Type: Idle ASP thread  # ChildEBP RetAddr  00 0329fdcc 7c827cfb ntdll!KiFastSystemCallRet 01 0329fdd0 77e6202c ntdll!NtWaitForMultipleObjects+0xc 02 0329fe78 7739bbd1 kernel32!WaitForMultipleObjectsEx+0x11a 03 0329fed4 7739ce36 USER32!RealMsgWaitForMultipleObjectsEx+0x141 04 0329fef0 4a77cb28 USER32!MsgWaitForMultipleObjects+0x1f 05 0329ff84 77bcb530 comsvcs!CSTAThread::WorkerLoop+0x1f9 06 0329ffb8 77e64829 msvcrt!_endthreadex+0xa3 07 0329ffec 00000000 kernel32!BaseThreadStart+0x34         Thread ID: 18 System Thread ID: 1ab0 Kernel Time: 0:0:3.406 User Time: 0:0:25.843 *** WARNING: Unable to verify checksum for C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\System.DirectorySer#\54bf4abd12c4a168968605947cbd7006\System.DirectoryServices.ni.dll Thread Type: Other  # ChildEBP RetAddr  00 0336c430 76f17bbc WLDAP32!DrainWinsock+0x116 01 0336c47c 76f19f1c WLDAP32!LdapWaitForResponseFromServer+0x2e0 02 0336c804 76f19cf5 WLDAP32!LdapExchangeOpaqueToken+0x363 03 0336c8bc 76f1993f WLDAP32!LdapSspiBind+0x372 04 0336cc6c 76f1a5cc WLDAP32!LdapBind+0x3a2 05 0336cc94 76dc467d WLDAP32!ldap_bind_sW+0x2c 06 0336cce0 76dc4410 adsldpc!LdapBindS+0xe4 07 0336cd0c 76dc42fe adsldpc!LdapOpenBindWithDefaultCredentials+0x18d 08 0336d174 76dc379f adsldpc!LdapOpenObject2+0x128 09 0336d194 712d3e32 adsldpc!LdapOpenObject+0x1b 0a 0336d1c4 712d3d6d adsldp!CLDAPRootDSE::CreateRootDSE+0x97 0b 0336d1f4 712d4828 adsldp!GetRootDSEObject+0x51 0c 0336d468 712d284c adsldp!GetServerBasedObject+0x11b 0d 0336d8c0 712d52f3 adsldp!GetObjectW+0x69 0e 0336d8ec 76df1bbb adsldp!CLDAPNamespace::OpenDSObject+0x34 0f 0336d944 03c5bf9c activeds!ADsOpenObject+0xb2 WARNING: Frame IP not in any known module. Following frames may be wrong. 10 0336d9e4 67170d73 0x3c5bf9c 11 0336da40 671663ae System_DirectoryServices_ni+0x10d73 12 0336daa8 67166245 System_DirectoryServices_ni+0x63ae 13 0336dab8 67165870 System_DirectoryServices_ni+0x6245 14 0336dac8 6716d0fa System_DirectoryServices_ni+0x5870 15 04d1101c 03dba1d8 System_DirectoryServices_ni+0xd0fa 16 03dcb004 00000001 0x3dba1d8         Thread ID: 19 System Thread ID: 12d4 Kernel Time: 0:0:0.78 User Time: 0:0:0.234 Thread Status: Thread is in a WAIT ***********************   More information about my system Machine: windows 2003 SP2 IIS: IIS 6 Application: classical ASP application using C# COM object to query the LDAP server. C# code is using System.DirectoryServices library and is running under .Net 2.0 framework. I will really appreciate your help.   Thanks, Sushil

  Tags: DirectoryEntryIIS 6.0C#ASP Classic.Net 2.0authentication

• 10-09-2007, 10:22 PM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890

  Re: LDAP IIS 6 Problem Reply Contact I would query a specific DC with an account that has permissions to query AD. Generally this account needs to be a domain admin.  Does your code pass credentials that are an AD domain admin or Administrator?  Or does your application pool account have permissions AD.  Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 10-09-2007, 10:25 PM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890	Re: LDAP IIS 6 Problem Reply Contact http://weblogs.asp.net/steveschofield/archive/2004/04.aspx has two posts how to pass credentials when querying / connecting to AD. Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 10-10-2007, 12:40 AM

  In reply to

  shp1979 Joined on 10-09-2007, 6:48 PM Posts 5

  Re: LDAP IIS 6 Problem Reply Contact Hi Steve, no i am not passing credentials but the application pool account has permissions on AD. Thing is, the application works fine for first few minutes. It is able to connect to AD and able to get information like password age policy and last password change date etc. So i think it is not a permission issue otherwise it would have break on it's first query itself. I am also using IP address of AD server instead of its DNS name to make sure that DNS resolution is failing. I am using object locks around the LDAP code. So probably it's not because of simultaneous access of some object/connection. Let me know if you need any other information. Thanks, Sushil

• 10-10-2007, 1:15 AM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890

  Re: LDAP IIS 6 Problem Reply Contact Then it sounds more like a timeout issue or something related.  Do you see anything on the domain controllers?  Once ADSI breaks the connection, your code could be spinning trying to connect on a broken connection much like when connecting to a DB.  I would use a network sniffer to watch the traffic between the web server and a specific DC, see if port 389 calls are going back and forth. http://support.microsoft.com/kb/315071  this has some AD related timeouts, max's and such.   Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 10-10-2007, 2:35 AM

  In reply to

  shp1979 Joined on 10-09-2007, 6:48 PM Posts 5

  Re: LDAP IIS 6 Problem Reply Contact Yes, that might be causing problem. I will monitor network connections and see whether there are any pending connections.I actually had used netstat on my web server to see whether there are any active connections to the LDAP server. Most of the times it was showing TIME_WAIT connections with the ldap server, which I think is ok. For few times it showed CLOSE_WAIT on ldap connections. I saw this few times when w3wp process stopped responding but it doesn’t happen always. Another thing I saw is an UDP connection to *.* from my web server. This connection always remains there and for some reason if we loose this connection, I think that’s another time when w3wp process stops responding. It does try to connect to LDAP server but not sure whether it gets any response or not. Sometimes w3wp process gets recycled after being in a loop for some time and the new w3wp process works fine. I checked the event logs when w3wp process was recycled but didn’t find anything useful there. There are couples of other things that we observed that you might find intereting. We observed that all browsers from one machine were waiting for response from the server while the browsers on another machine were working fine.Then after some time even those browsers went into a wait state. So is it possible that w3wp would decide not to respond to all request coming from a machine(or for a session) and servers other machines properly. Is it like w3wp allocates one thread for a session and all request from that session/machine goes to only that thread. Sometime we also get TNS protocol adaptor invalid error at the same time on some other pages. It fails to make database connection! So I am not sure whether the problem is with LDAP or its IIS that is causing problem. I don’t see the database error if the LDAP feature is turned off. So again, it tells me that it's an LDAP issue. Does  ADSI retains the connection with LDAP server even after LDAP objects are disposed? Then if that connection is broken or closed then isn’t ADSI supposed to make a new connection when it gets a new LDAP query request? Please explain. I will try to see what parameters are defined on our LDAP server. I will get back to you if I find something.Thanks,Sushil

• 10-12-2007, 8:45 PM

  In reply to

  shp1979 Joined on 10-09-2007, 6:48 PM Posts 5

  Re: LDAP IIS 6 Problem Reply Contact I got this stack trace for the thread that was hanging...   ntkrnlpa.exe+0x8dace ntkrnlpa.exe+0x29a62 ntkrnlpa.exe+0x33178 hal.dll+0x6199 hal.dll+0x63d9 hal.dll+0x6577 hal.dll+0x3902 hal.dll+0x60b4 ntkrnlpa.exe+0xf5c89 ntkrnlpa.exe+0xeed08 ntkrnlpa.exe+0x8978c ntdll.dll!KiFastSystemCallRet WS2_32.dll!select+0xa1 WLDAP32.dll!LdapUTF8ToUnicode+0xc2f WLDAP32.dll!LdapUTF8ToUnicode+0x1116 WLDAP32.dll!LdapUTF8ToUnicode+0x1488 WLDAP32.dll!ldap_search_ext_sW+0x7c WLDAP32.dll!ldap_search_stW+0x44 WLDAP32.dll!ldap_search_sW+0x21 adsldpc.dll!LdapAttributeFree+0x42 adsldpc.dll!LdapSearchS+0x26 adsldp.dll!DllGetClassObject+0x21be adsldp.dll!DllGetClassObject+0x118d adsldp.dll!DllGetClassObject+0x1986e mscorwks.dll!DllGetClassObjectInternal+0x89f8 System.DirectoryServices.ni.dll+0xd109   any idea what it is waiting for ??   -sushil

• 10-13-2007, 11:03 AM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890	Re: LDAP IIS 6 Problem Reply Contact I would review the code related to the LDAP search, make sure it can return the results in-time.  That is the only thing that stands out.  Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 10-15-2007, 5:03 PM

  In reply to

  mmaddox0 Joined on 10-15-2007, 9:00 PM Posts 1	Re: LDAP IIS 6 Problem Reply Contact I'm getting same error but for a non-IIS program.  My dll is called first.dll and it seems to be enlessly looping or something within the ntkrnlpa.exe ntkrnlpa.exe+0x8dace ntkrnlpa.exe+0x29a62 ntkrnlpa.exe+0x33178 hal.dll+0x6199 hal.dll+0x63d9 hal.dll+0x6577 hal.dll+0x3902 first.dll!FMatchFareClassWildcard+0x54 Please let me know if you find what causes this.

• 10-15-2007, 11:36 PM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890

  Re: LDAP IIS 6 Problem Reply Contact No idea Sorry.  I would use a network sniffer to see what is happening.  Make sure your code points to a single domain controller and see if the results speed up.  Also, make sure the queries you are running you test directly on a domain controller (test domain prefererably) or a stub program to isolate your queries are optimized.  Beyond that, I don't know what else to recommend. PS: Here is an LDAP browser I've used to determine the data I'm going after.  You'll need to check with your AD admin's first (or I would recommend it). http://www.ldapbrowser.com/download.htm   Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 10-19-2007, 2:00 AM

  In reply to

  shp1979 Joined on 10-09-2007, 6:48 PM Posts 5

  Re: LDAP IIS 6 Problem Reply Contact Hi..... do you guys see anything wrong with this code.. something that i am overlooking or missing... please let me know... i am still trying to find solution for my problem. i am trying to determine whether the user's password is going to expire.. thanks, sushil      public LdapQueryResponse getPasswordExpirationProtocol(LdapQueryUserData userData)         {             LdapQueryResponse lqr = null;             SearchResponse response = null;             PopulateTrustedDomainList(false);             // get user data             // get full domain name             string fullDNS = null;             lock (lockObj)             {                 foreach (string domain in trustedDomains)                 {                     if (domain.ToUpper().StartsWith(userData.Domain.ToUpper()))                     {                         fullDNS = domain;                         break;                     }                 }             }             // if full domain name cannot be resolved then return error             if (fullDNS == null)             {                 throw new Exception("Could not resolve full domain name for domain name : " + userData.Domain);             }                   System.DirectoryServices.Protocols.LdapConnection connect = null;             try             {                 if (connect == null)                 {                    connect = new System.DirectoryServices.Protocols.LdapConnection(new LdapDirectoryIdentifier(fullDNS));                      connect.SessionOptions.ProtocolVersion = 3;                     connect.SessionOptions.ReferralChasing = ReferralChasingOptions.None;                     connect.SessionOptions.AutoReconnect = false;                     connect.SessionOptions.PingKeepAliveTimeout = TimeSpan.FromSeconds(5);                     connect.SessionOptions.PingLimit = 1;                     connect.SessionOptions.PingWaitTimeout = TimeSpan.FromSeconds(5);                     connect.SessionOptions.TcpKeepAlive = false;                     connect.Timeout = TimeSpan.FromSeconds(10);                     connect.Bind();                 }                    //create path to search ldap server                 string[] fullDNSSplit = fullDNS.Split(new char[] { '.' });                 string dcPart = "";                 for (int i = 0; i < fullDNSSplit.Length; i++)                 {                     dcPart += "DC=" + fullDNSSplit[i];                     if (i < fullDNSSplit.Length - 1)                     {                         dcPart += ",";                     }                 }                 long passwordAge = -1;                          SearchRequest request = new SearchRequest(dcPart, "(objectClass=domainDNS)", System.DirectoryServices.Protocols.SearchScope.Subtree, new string[] { "maxpwdage" });                 request.TimeLimit = TimeSpan.FromSeconds(10);                 request.Scope = System.DirectoryServices.Protocols.SearchScope.Base;                 request.SizeLimit = 500;                               response = (SearchResponse)connect.SendRequest(request, TimeSpan.FromSeconds(5));                 if (response.Entries.Count > 0)                 {                     SearchResultEntry entry = response.Entries[0];                     if (entry.Attributes.Contains("maxpwdage"))                     {                         string maxpwdage = entry.Attributes["maxpwdage"][0].ToString();                         Int64 parameterValue = Int64.Parse(maxpwdage);                         int hi = (int)(parameterValue >> 32);                         int lo = (int)(parameterValue & 0xFFFFFFFF);                         passwordAge = (long)((hi * Math.Pow(2, 32)) + lo);                         if (passwordAge == -9223372036854775808)                         {                             passwordAge = 0;                         }                     }                 }                 else                 {                     throw new Exception("Didn't receive any information about global policies");                 }                 if (passwordAge == -1)                 {                     throw new Exception("Failed to read password age");                 }                 if (passwordAge == 0)                 {                     lqr = new LdapQueryResponse();                     lqr.PasswordExpires = false;                     lqr.log = logStr;                     return lqr;                 }                 request = new SearchRequest(dcPart, "(SAMAccountName=" + userData.UserName + ")", System.DirectoryServices.Protocols.SearchScope.Subtree, new string[] { "userAccountControl", "pwdLastSet" });                 response = (SearchResponse)connect.SendRequest(request, TimeSpan.FromSeconds(5));                 bool passwordDoesNotExpire = false;                 DateTime passwordLastSet = DateTime.MinValue;                 if (response.Entries.Count > 0)                 {                     SearchResultEntry entry = response.Entries[0];                     if (entry.Attributes.Contains("userAccountControl"))                     {                         int userAccountControl = Int32.Parse(entry.Attributes["userAccountControl"][0].ToString());                         if (Convert.ToBoolean((int)(userAccountControl & 0x0020)))                         {                             passwordDoesNotExpire = true;                         }                         else                             if (Convert.ToBoolean((int)(userAccountControl & 0x10000)))                             {                                 passwordDoesNotExpire = true;                             }                     }                     if (entry.Attributes.Contains("pwdLastSet"))                     {                         Int64 parameterValue = Int64.Parse(entry.Attributes["pwdLastSet"][0].ToString());                         int hi = (int)(parameterValue >> 32);                         int lo = (int)(parameterValue & 0xFFFFFFFF);                         long ticks = (long)((hi * Math.Pow(2, 32)) + lo);                         if (ticks != 0)                         {                             passwordLastSet = DateTime.FromFileTime(ticks);                         }                         else                         {                             throw new Exception("User password not set yet");                         }                     }                     else                     {                         throw new Exception("Failed to read password last set date. Parameter not available");                     }                 }                 else                 {                     throw new Exception("Didn't receive any information about user's password change date");                 }                 if (passwordDoesNotExpire)                 {                     lqr = new LdapQueryResponse();                     lqr.PasswordExpires = false;                     lqr.log = logStr;                     return lqr;                 }                 // if user's last password change date cannot be read then return error                 if (passwordLastSet == DateTime.MinValue)                 {                     throw new Exception("Failed to get value for password last set date");                 }                 //     add the password age to the last password change date and get the                 //    password expiry date                                 DateTime passwordExpiryDate = passwordLastSet.Subtract(new TimeSpan(passwordAge));                 lqr = new LdapQueryResponse();                 lqr.PasswordExpires = true;                 lqr.ExpiryDate = passwordExpiryDate;                 lqr.log = logStr;             }             catch (Exception e)             {                 lqr = new LdapQueryResponse();                 lqr.InternalError = true;                 lqr.ErrorMessage = "Error in getPasswordExpirationProtocol: " + e.Message + " " + userData.UserName + " " + userData.Password + " " + userData.Domain;                 lqr.log = logStr;                    return lqr;             }             finally             {                                try                 {                     if (connect != null)                     {                         connect.Dispose();                     }                 }                 catch (Exception e1)                 {                     lqr.InternalError = true;                     lqr.ErrorMessage = lqr.ErrorMessage + "|" + e1.Message;                 }                 connect = null;             }             return lqr;                     }