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Matthew,

Attached is a first shot at the backtrace. It looks like I have many missing symbol tables, so I'm not sure how useful this will be to you. The hang appears to be in pthread, so it may not strictly be a slapd issue after all.

As a temporary measure, I'm looking at a workaround on our end that breaks up the replace calls into adds and deletes. This may let us work around this entire problem. It doesn't address the underlying issue though.

Thanks,

Mark

Can you attach a gdb backtrace taken during the hang? (thread apply all backtrace full)

--------------030103000807090505050604 Content-Type: text/plain; name="gdb-slapd.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="gdb-slapd.txt"

GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu". (gdb) attach 14884 Attaching to process 14884 Reading symbols from /sysvol/ldap/release/2.4.19/lib/slapd...(no debugging symbols found)...done. Reading symbols from /sysvol/ldap/release/2.4.19/lib/libldap_r-2.4.so.2...done. Loaded symbols for /sysvol/ldap/release/2.4.19/lib/libldap_r-2.4.so.2 Reading symbols from /sysvol/ldap/release/2.4.19/lib/liblber-2.4.so.2...done. Loaded symbols for /sysvol/ldap/release/2.4.19/lib/liblber-2.4.so.2 Reading symbols from /usr/lib/libdb-4.6.so...done. Loaded symbols for /usr/lib/libdb-4.6.so Reading symbols from /usr/lib/libodbc.so.1...done. Loaded symbols for /usr/lib/libodbc.so.1 Reading symbols from /lib/libpthread.so.0...done. [Thread debugging using libthread_db enabled] [New Thread 0xb6dc79b0 (LWP 14884)] [New Thread 0xa1143b90 (LWP 14886)] [New Thread 0xa1543b90 (LWP 14885)] Loaded symbols for /lib/libpthread.so.0 Reading symbols from /usr/lib/libslp.so.1...done. Loaded symbols for /usr/lib/libslp.so.1 Reading symbols from /lib/libnsl.so.1...done. Loaded symbols for /lib/libnsl.so.1 Reading symbols from /usr/lib/libicuuc.so.38...done. Loaded symbols for /usr/lib/libicuuc.so.38 Reading symbols from /usr/lib/libicudata.so.38...warning: Lowest section in /usr/lib/libicudata.so.38 is .hash at 000000b4 done. Loaded symbols for /usr/lib/libicudata.so.38 Reading symbols from /usr/lib/libsasl2.so.2...done. Loaded symbols for /usr/lib/libsasl2.so.2 Reading symbols from /usr/lib/libgnutls.so.26...done. Loaded symbols for /usr/lib/libgnutls.so.26 Reading symbols from /usr/lib/libtasn1.so.3...done. Loaded symbols for /usr/lib/libtasn1.so.3 Reading symbols from /usr/lib/libz.so.1...done. Loaded symbols for /usr/lib/libz.so.1 Reading symbols from /usr/lib/libgcrypt.so.11...done. Loaded symbols for /usr/lib/libgcrypt.so.11 Reading symbols from /usr/lib/libgpg-error.so.0...done. Loaded symbols for /usr/lib/libgpg-error.so.0 Reading symbols from /lib/libcrypt.so.1...done. Loaded symbols for /lib/libcrypt.so.1 Reading symbols from /lib/libresolv.so.2...done. Loaded symbols for /lib/libresolv.so.2 Reading symbols from /usr/lib/libltdl.so.3...done. Loaded symbols for /usr/lib/libltdl.so.3 Reading symbols from /lib/libdl.so.2...done. Loaded symbols for /lib/libdl.so.2 Reading symbols from /lib/libwrap.so.0...done. Loaded symbols for /lib/libwrap.so.0 Reading symbols from /lib/libc.so.6...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /usr/lib/libstdc++.so.6...done. Loaded symbols for /usr/lib/libstdc++.so.6 Reading symbols from /lib/libm.so.6...done. Loaded symbols for /lib/libm.so.6 Reading symbols from /lib/libgcc_s.so.1...done. Loaded symbols for /lib/libgcc_s.so.1 Reading symbols from /lib/libnss_files.so.2...done. Loaded symbols for /lib/libnss_files.so.2 Reading symbols from /lib/libnss_dns.so.2...done. Loaded symbols for /lib/libnss_dns.so.2 Reading symbols from /usr/lib/sasl2/libanonymous.so.2...done. Loaded symbols for /usr/lib/sasl2/libanonymous.so.2 Reading symbols from /usr/lib/sasl2/liblogin.so.2...done. Loaded symbols for /usr/lib/sasl2/liblogin.so.2 Reading symbols from /usr/lib/sasl2/libntlm.so.2...done. Loaded symbols for /usr/lib/sasl2/libntlm.so.2 Reading symbols from /usr/lib/i686/cmov/libcrypto.so.0.9.8...done. Loaded symbols for /usr/lib/i686/cmov/libcrypto.so.0.9.8 Reading symbols from /usr/lib/sasl2/libdigestmd5.so.2...done. Loaded symbols for /usr/lib/sasl2/libdigestmd5.so.2 Reading symbols from /usr/lib/sasl2/libsasldb.so.2...done. Loaded symbols for /usr/lib/sasl2/libsasldb.so.2 Reading symbols from /usr/lib/sasl2/libcrammd5.so.2...done. Loaded symbols for /usr/lib/sasl2/libcrammd5.so.2 Reading symbols from /usr/lib/sasl2/libgssapiv2.so.2...done. Loaded symbols for /usr/lib/sasl2/libgssapiv2.so.2 Reading symbols from /usr/lib/libgssapi_krb5.so.2...done. Loaded symbols for /usr/lib/libgssapi_krb5.so.2 Reading symbols from /usr/lib/libkrb5.so.3...done. Loaded symbols for /usr/lib/libkrb5.so.3 Reading symbols from /usr/lib/libk5crypto.so.3...done. Loaded symbols for /usr/lib/libk5crypto.so.3 Reading symbols from /lib/libcom_err.so.2...done. Loaded symbols for /lib/libcom_err.so.2 Reading symbols from /usr/lib/libkrb5support.so.0...done. Loaded symbols for /usr/lib/libkrb5support.so.0 Reading symbols from /lib/libkeyutils.so.1...done. Loaded symbols for /lib/libkeyutils.so.1 Reading symbols from /usr/lib/sasl2/libplain.so.2...done. Loaded symbols for /usr/lib/sasl2/libplain.so.2 Reading symbols from /sysvol/ldap/release/2.4.19/lib/ldap/back_bdb-2.4.so.2...done. Loaded symbols for /sysvol/ldap/release/2.4.19/lib/ldap/back_bdb-2.4.so.2 Reading symbols from /sysvol/ldap/release/2.4.19/lib/ldap/syncprov-2.4.so.2...done. Loaded symbols for /sysvol/ldap/release/2.4.19/lib/ldap/syncprov-2.4.so.2 Reading symbols from /sysvol/ldap/release/2.4.19/lib/ldap/ppolicy-2.4.so.2...done. Loaded symbols for /sysvol/ldap/release/2.4.19/lib/ldap/ppolicy-2.4.so.2 0xb7df3492 in pthread_join () from /lib/libpthread.so.0 (gdb) continue Continuing. [New Thread 0xa0c42b90 (LWP 15033)]

Program received signal SIGINT, Interrupt. [Switching to Thread 0xb6dc79b0 (LWP 14884)] 0xb7df3492 in pthread_join () from /lib/libpthread.so.0 (gdb) backtracer  full #0 0xb7df3492 in pthread_join () from /lib/libpthread.so.0 No symbol table info available. #1 0xb7fb9264 in ldap_pvt_thread_join (thread=2706652048, thread_return=0x0) at thr_posix.c:197 No locals. #2 0x080715e3 in slapd_daemon () No symbol table info available. #3 0x0805e535 in main () No symbol table info available. (gdb) info registers eax 0xfffffe00 -512 ecx 0x0 0 edx 0x3a25 14885 ebx 0xa1543bd8 -1588315176 esp 0xbfff9274 0xbfff9274 ebp 0xbfff92a8 0xbfff92a8 esi 0x0 0 edi 0xb7e01ff4 -1210048524 eip 0xb7df3492 0xb7df3492 <pthread_join+274> eflags 0x200246 [ PF ZF IF ID ] cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 (gdb) thread apply all backtrace

Thread 4 (Thread 0xa0c42b90 (LWP 15033)): #0 0xb7df68f0 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0 #1 0xb7fb9124 in ldap_pvt_thread_cond_wait (cond=0x9ca3324, mutex=0x9ca330c) at thr_posix.c:277 #2 0xb7fb84d2 in ldap_int_thread_pool_wrapper (xpool=0x9ca3308) at tpool.c:672 #3 0xb7df2f3b in start_thread () from /lib/libpthread.so.0 #4 0xb6fb4bee in clone () from /lib/libc.so.6

Thread 3 (Thread 0xa1543b90 (LWP 14885)): #0 0xb6fb539c in epoll_wait () from /lib/libc.so.6 #1 0x080748ff in ?? () #2 0x00000006 in ?? () #3 0x09c846c0 in ?? () #4 0x00000400 in ?? () #5 0x000bb800 in ?? () #6 0x00000000 in ?? ()

Thread 2 (Thread 0xa1143b90 (LWP 14886)): #0 0xb7df68f0 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0 #1 0xb7fb9124 in ldap_pvt_thread_cond_wait (cond=0x9ca3324, mutex=0x9ca330c) at thr_posix.c:277 #2 0xb7fb84d2 in ldap_int_thread_pool_wrapper (xpool=0x9ca3308) at tpool.c:672 #3 0xb7df2f3b in start_thread () from /lib/libpthread.so.0 #4 0xb6fb4bee in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb6dc79b0 (LWP 14884)): #0 0xb7df3492 in pthread_join () from /lib/libpthread.so.0 #1 0xb7fb9264 in ldap_pvt_thread_join (thread=2706652048, thread_return=0x0) at thr_posix.c:197 #2 0x080715e3 in slapd_daemon () #3 0x0805e535 in main () (gdb) quit The program is running. Quit anyway (and detach it)? (y or n) Detaching from program: /sysvol/ldap/release/2.4.19/lib/slapd, process 14884

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