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(ITS#7949) Slapd deadlocks on connection

To: openldap-its@OpenLDAP.org
Subject: (ITS#7949) Slapd deadlocks on connection
From: quanah@openldap.org
Date: Wed, 24 Sep 2014 21:39:19 +0000
Auto-submitted: auto-generated (OpenLDAP-ITS)
Full_Name: Quanah Gibson-Mount
Version: 2.4.40
OS: Linux 3.11
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (75.111.64.214)


After deploying OpenLDAP 2.4.40, slapd becomes completely unresponsive, and
every thread but the daemon is deadlocked


Thread 10 (Thread 0x7fc4c7ba2700 (LWP 14910)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64%lolowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043da27 in connection_write (s=10) at connection.c:1917
#6  0x000000000043804b in slapd_daemon_task (ptr=0x2749d38) at daemon.c:2757
#7  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c7ba2700) at
pthread_create.c:308
#8  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fc4c73a1700 (LWP 14914)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fd8ce078745 in ldap_pvt_thread_cond_wait (cond=0x302bd38,
mutex=0x302bd10) at thr_posix.c:277
#2  0x0000000000451459 in send_ldap_ber (op=0x2c483c0, ber=0x7fc4c739f800) at
result.c:377
#3  0x00000000004550ca in slap_send_search_entry (op=0x2c483c0,
rs=0x7fc4c73a0a00) at result.c:1433
#4  0x000000000043f4ad in fe_op_search (op=0x2c483c0, rs=0x7fc4c73a0a00) at
search.c:327
#5  0x000000000043f0c1 in do_search (op=0x2c483c0, rs=0x7fc4c73a0a00) at
search.c:247
#6  0x000000000043b937 in connection_operation (ctx=0x7fc4c73a0b40,
arg_v=0x2c483c0) at connection.c:1132
#7  0x000000000043bec9 in connection_read_thread (ctx=0x7fc4c73a0b40, argv=0xa)
at connection.c:1268
#8  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#9  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c73a1700) at
pthread_create.c:308
#10 0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fc4c6ba0700 (LWP 14915)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c6b9faf0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c6b9fb40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c6ba0700) at
pthread_create.c:308
#9  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()
ATAThread 7 (Thread 0x7fc4c639f700 (LWP 14916)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c639eaf0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c639eb40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c639f700) at
pthread_create.c:308
#9  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fc4c5b9e700 (LWP 22253)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c5b9daf0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c5b9db40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c5b9e700) at
pthread_create.c:308
#9  0x00007fd8cc16b3finin clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fc4c539d700 (LWP 22254)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
3231  0x000078c8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c539caf0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c539cb40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c539d700) at
pthread_create.c:308
#9  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fc4c4b9c700 (LWP 22255)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fd8ce078745 in ldap_pvt_thread_cond_wait (cond=0x302bce0,
mutex=0x302bcb8) at thr_posix.c:277
#2  0x000000000043ab12 in connection_wake_writers (c=0x302bb80) at
connection.c:765
#3  0x000000000043acb2 in connection_closing (c=0x302bb80, why=0x0) at
connection.c:800
#4  0x000000000043bbff in connection_operation (ctx=0x7fc4c4b9bb40,
arg_v=0x86b6940) at connection.c:1182
#5  0x000000000043bec9 in connection_read_thread (ctx=0x7fc4c4b9bb40, argv=0xa)
at connection.c:1268
#6  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#7  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c4b9c700) at
pthread_create.c:308
#8  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc4c439b700 (LWP 22256)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c439aaf0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c439ab40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c439b700) at
pthread_create.c:308
#9  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc4c3b9a700 (LWP 22257)):
#0  __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1  0x00007fd8cc441065 in _L_lock_858 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd8cc440eba in __pthread_mutex_lock (mutex=0x302bb98) at
pthread_mutex_lock.c:61
#3  0x00007fd8ce078798 in ldap_pvt_thread_mutex_lock (mutex=0x302bb98) at
thr_posix.c:296
#4  0x0000000000439470 in connection_get (s=10) at connection.c:278
#5  0x000000000043bfee in connection_read (s=10, cri=0x7fc4c3b99af0) at
connection.c:1310
#6  0x000000000043be2a in connection_read_thread (ctx=0x7fc4c3b99b40, argv=0xa)
at connection.c:1261
#7  0x00007fd8ce077043 in ldap_int_thread_pool_wrapper (xpool=0x2972000) at
tpool.c:945
#8  0x00007fd8cc43ee9a in start_thread (arg=0x7fc4c3b9a700) at
pthread_create.c:308
#9  0x00007fd8cc16b3fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd8ce727740 (LWP 14909)):
#0  0x00007fd8cc440148 in pthread_join (threadid=140483141183232,
thread_return=0x0) at pthread_join.c:89
#1  0x00007fd8ce078686 in ldap_pvt_thread_join (thread=140483141183232,
thread_return=0x0) at thr_posix.c:197
#2  0x000000000043893a in slapd_daemon () at daemon.c:2907
#3  0x0000000000414b38 in main (argc=9, argv=0x7fff5361c928) at main.c:1012
(gdb)
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