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Re: ITS#3950

To: Howard Chu <hyc@symas.com>
Subject: Re: ITS#3950
From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
Date: Thu, 05 Jan 2006 17:42:42 -0800
Cc: Quanah Gibson-Mount <quanah@stanford.edu>, openldap-devel@OpenLDAP.org
In-reply-to: <43BDB322.8030502@symas.com>
References: <3D834D787284EA7A18ED20D0@[10.0.0.1]> <6.2.1.2.0.20060105104959.031527c8@mail.openldap.org> <6.2.1.2.0.20060105111320.03150ce8@mail.openldap.org> <43BDB322.8030502@symas.com>
At 04:00 PM 1/5/2006, Howard Chu wrote:
>I reworked most of the yield() calls in daemon.c, and those changes are in RE23. However, the BDB library itself makes yield() calls as well, which I ignored. It seems we should apply the patch in ITS#3950 after all. 

We likely need to do so conditionally.

On FreeBSD 4, using select(2) here causes test008 to run forever
(or, at least very much longer than normal).

(gdb) thread apply all bt

Thread 16 (process 68556, thread 3):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0x82c0c00, txn=0x0, dn=0xde4e990, ei=0xde4e984)
    at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0x82c0c00, txn=0x0, ndn=0x82c0c1c, 
    res=0xde4e9d8) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0x82c0c00, tid=0x0, dn=0x82c0c1c, 
    e=0xde4ea24, matched=1, locker=51, lock=0xde4ea2c) at dn2entry.c:48
#20 0x80ca408 in bdb_referrals (op=0x82c0c00, rs=0xde4ed70) at referral.c:54
#21 0x807e332 in backend_check_referrals (op=0x82c0c00, rs=0xde4ed70)
    at backend.c:1193
#22 0x807935b in fe_op_add (op=0x82c0c00, rs=0xde4ed70) at add.c:266
#23 0x8079150 in do_add (op=0x82c0c00, rs=0xde4ed70) at add.c:182
#24 0x8073c78 in connection_operation (ctx=0xde4ee3c, arg_v=0x82c0c00)
    at connection.c:1307
#25 0x8073fe7 in connection_read_thread (ctx=0xde4ee3c, argv=0x23)
    at connection.c:1434
#26 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#27 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#28 0x0 in ?? ()

Thread 15 (process 68556, thread 15):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185c48 in lutil_debug (debug=261, level=4, fmt=0x81941b6 "    attrs:")
    at debug.c:72
#6  0x8075aab in do_search (op=0xa534c00, rs=0x9523d70) at search.c:171
#7  0x8073c78 in connection_operation (ctx=0x9523e3c, arg_v=0xa534c00)
    at connection.c:1307
#8  0x8073fe7 in connection_read_thread (ctx=0x9523e3c, argv=0xd)
    at connection.c:1434
#9  0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#10 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#11 0x0 in ?? ()

Thread 14 (process 68556, thread 2):
#0  0x28fb3858 in __sys_poll () from /usr/lib/libc_r.so.4
#1  0x28faf7cc in _select () from /usr/lib/libc_r.so.4
#2  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#3  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#4  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#5  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x80fda1b in bdb_dn2id (op=0xe55b200, txn=0x0, dn=0xe24e790, ei=0xe24e784)
    at dn2id.c:271
#17 0x80f940d in bdb_cache_find_ndn (op=0xe55b200, txn=0x0, ndn=0xe55b21c, 
    res=0xe24e7d8) at cache.c:330
#18 0x80fd0b2 in bdb_dn2entry (op=0xe55b200, tid=0x0, dn=0xe55b21c, 
    e=0xe24e824, matched=1, locker=49, lock=0xe24e82c) at dn2entry.c:48
#19 0x80ca408 in bdb_referrals (op=0xe55b200, rs=0xe24ed70) at referral.c:54
#20 0x807e332 in backend_check_referrals (op=0xe55b200, rs=0xe24ed70)
    at backend.c:1193
#21 0x8085ee0 in fe_op_modify (op=0xe55b200, rs=0xe24ed70) at modify.c:343
#22 0x80857c2 in do_modify (op=0xe55b200, rs=0xe24ed70) at modify.c:200
#23 0x8073c78 in connection_operation (ctx=0xe24ee3c, arg_v=0xe55b200)
    at connection.c:1307
#24 0x8073fe7 in connection_read_thread (ctx=0xe24ee3c, argv=0x22)
    at connection.c:1434
#25 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#26 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#27 0x0 in ?? ()

Thread 13 (process 68556, thread 5):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0xe55b600, txn=0x0, dn=0xd64b990, ei=0xd64b984)
    at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0xe55b600, txn=0x0, ndn=0xe55b61c, 
    res=0xd64b9d8) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0xe55b600, tid=0x0, dn=0xe55b61c, 
    e=0xd64ba24, matched=1, locker=59, lock=0xd64ba2c) at dn2entry.c:48
#20 0x80ca408 in bdb_referrals (op=0xe55b600, rs=0xd64bd70) at referral.c:54
#21 0x807e332 in backend_check_referrals (op=0xe55b600, rs=0xd64bd70)
    at backend.c:1193
#22 0x807935b in fe_op_add (op=0xe55b600, rs=0xd64bd70) at add.c:266
#23 0x8079150 in do_add (op=0xe55b600, rs=0xd64bd70) at add.c:182
#24 0x8073c78 in connection_operation (ctx=0xd64be3c, arg_v=0xe55b600)
    at connection.c:1307
#25 0x8073fe7 in connection_read_thread (ctx=0xd64be3c, argv=0x1e)
    at connection.c:1434
#26 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#27 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#28 0x0 in ?? ()

Thread 12 (process 68556, thread 7):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0xe55b000, txn=0x0, dn=0xce49b70, ei=0xce49b64)
    at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0xe55b000, txn=0x0, ndn=0xe55b01c, 
    res=0xce49bb8) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0xe55b000, tid=0x0, dn=0xe55b01c, 
    e=0xce49c04, matched=1, locker=58, lock=0xce49c0c) at dn2entry.c:48
#20 0x80ca408 in bdb_referrals (op=0xe55b000, rs=0xce49d70) at referral.c:54
#21 0x807e332 in backend_check_referrals (op=0xe55b000, rs=0xce49d70)
    at backend.c:1193
#22 0x8087d88 in fe_op_modrdn (op=0xe55b000, rs=0xce49d70) at modrdn.c:274
#23 0x80879d5 in do_modrdn (op=0xe55b000, rs=0xce49d70) at modrdn.c:185
#24 0x8073c78 in connection_operation (ctx=0xce49e3c, arg_v=0xe55b000)
    at connection.c:1307
#25 0x8073fe7 in connection_read_thread (ctx=0xce49e3c, argv=0x21)
    at connection.c:1434
#26 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#27 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#28 0x0 in ?? ()

Thread 11 (process 68556, thread 4):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fe2701 in vfprintf () from /usr/lib/libc_r.so.4
#5  0x28fe2336 in fprintf () from /usr/lib/libc_r.so.4
#6  0x8075dcc in do_search (op=0xe55b400, rs=0xda4ed70) at search.c:211
#7  0x8073c78 in connection_operation (ctx=0xda4ee3c, arg_v=0xe55b400)
    at connection.c:1307
#8  0x8073fe7 in connection_read_thread (ctx=0xda4ee3c, argv=0x20)
    at connection.c:1434
#9  0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#10 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#11 0x0 in ?? ()

Thread 10 (process 68556, thread 8):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185c48 in lutil_debug (debug=261, level=4, 
    fmt=0x819415b "    %d %d %d\n") at debug.c:72
#6  0x807582e in do_search (op=0x82c0a00, rs=0xc145d70) at search.c:123
#7  0x8073c78 in connection_operation (ctx=0xc145e3c, arg_v=0x82c0a00)
    at connection.c:1307
#8  0x8073fe7 in connection_read_thread (ctx=0xc145e3c, argv=0x24)
    at connection.c:1434
#9  0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#10 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#11 0x0 in ?? ()

Thread 9 (process 68556, thread 11):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fdc54 in bdb_dn2id_children (op=0xa534a00, txn=0xaa3a700, e=0xf069000)
    at dn2id.c:321
#18 0x80f9c87 in bdb_cache_children (op=0xa534a00, txn=0xaa3a700, e=0xf069000)
    at cache.c:906
#19 0x80c89f1 in bdb_modrdn (op=0xa534a00, rs=0xa532d70) at modrdn.c:208
#20 0x8087e46 in fe_op_modrdn (op=0xa534a00, rs=0xa532d70) at modrdn.c:317
#21 0x80879d5 in do_modrdn (op=0xa534a00, rs=0xa532d70) at modrdn.c:185
#22 0x8073c78 in connection_operation (ctx=0xa532e3c, arg_v=0xa534a00)
    at connection.c:1307
#23 0x8073fe7 in connection_read_thread (ctx=0xa532e3c, argv=0x1c)
    at connection.c:1434
#24 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#25 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#26 0x0 in ?? ()

Thread 8 (process 68556, thread 10):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185c48 in lutil_debug (debug=261, level=1, 
    fmt=0x81ac620 "bdb_modify_internal: 0x%08lx: %s\n") at debug.c:72
#6  0x80c6b36 in bdb_modify_internal (op=0xa534600, tid=0xf86d300, 
    modlist=0xe457600, e=0xae3a72c, text=0xae3ad84, textbuf=0xae3a76c "", 
    textlen=256) at modify.c:46
#7  0x80c7d77 in bdb_modify (op=0xa534600, rs=0xae3ad70) at modify.c:481
#8  0x808602c in fe_op_modify (op=0xa534600, rs=0xae3ad70) at modify.c:400
#9  0x80857c2 in do_modify (op=0xa534600, rs=0xae3ad70) at modify.c:200
#10 0x8073c78 in connection_operation (ctx=0xae3ae3c, arg_v=0xa534600)
    at connection.c:1307
#11 0x8073fe7 in connection_read_thread (ctx=0xae3ae3c, argv=0xf)
    at connection.c:1434
#12 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#13 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#14 0x0 in ?? ()

Thread 7 (process 68556, thread 14):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185c48 in lutil_debug (debug=261, level=4, 
    fmt=0x81bcdd0 "bdb_idl_delete_key: %lx %s\n") at debug.c:72
#6  0x8102582 in bdb_idl_delete_key (be=0x8255d00, db=0x9928800, 
    tid=0xaa3a100, key=0x99248d4, id=10) at idl.c:902
#7  0x8103cca in bdb_key_change (be=0x8255d00, db=0x9928800, txn=0xaa3a100, 
    k=0xa63684c, id=10, op=2) at key.c:97
#8  0x81032e1 in indexer (op=0x82c0600, txn=0xaa3a100, ad=0x8260480, 
    atname=0x825e9bc, vals=0x9d2b5a0, id=10, opid=2, mask=1814) at index.c:244
#9  0x8103430 in index_at_values (op=0x82c0600, txn=0xaa3a100, ad=0x8260480, 
    type=0x825e980, tags=0x8260490, vals=0x9d2b5a0, id=10, opid=2)
    at index.c:324
#10 0x81034ee in bdb_index_values (op=0x82c0600, txn=0xaa3a100, 
    desc=0x8260480, vals=0x9d2b5a0, id=10, opid=2) at index.c:373
#11 0x80c731a in bdb_modify_internal (op=0x82c0600, tid=0xaa3a100, 
    modlist=0xaf3b5a0, e=0x9924b0c, text=0x9924d84, 
    textbuf=0x9924b4c "modify/add: cn: value #0 already exists", textlen=256)
    at modify.c:233
#12 0x80c9908 in bdb_modrdn (op=0x82c0600, rs=0x9924d70) at modrdn.c:602
#13 0x8087e46 in fe_op_modrdn (op=0x82c0600, rs=0x9924d70) at modrdn.c:317
#14 0x80879d5 in do_modrdn (op=0x82c0600, rs=0x9924d70) at modrdn.c:185
#15 0x8073c78 in connection_operation (ctx=0x9924e3c, arg_v=0x82c0600)
    at connection.c:1307
#16 0x8073fe7 in connection_read_thread (ctx=0x9924e3c, argv=0xe)
    at connection.c:1434
#17 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#18 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#19 0x0 in ?? ()

Thread 6 (process 68556, thread 12):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0xa534e00, txn=0x0, dn=0xa06d920, ei=0xa06d914)
    at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0xa534e00, txn=0x0, ndn=0xa534e1c, 
    res=0xa06d968) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0xa534e00, tid=0x0, dn=0xa534e1c, 
    e=0xa06da0c, matched=1, locker=34, lock=0xa06da14) at dn2entry.c:48
#20 0x80cb09e in bdb_search (op=0xa534e00, rs=0xa12dd70) at search.c:373
#21 0x8076163 in fe_op_search (op=0xa534e00, rs=0xa12dd70) at search.c:355
#22 0x8075e19 in do_search (op=0xa534e00, rs=0xa12dd70) at search.c:217
#23 0x8073c78 in connection_operation (ctx=0xa12de3c, arg_v=0xa534e00)
    at connection.c:1307
#24 0x8073fe7 in connection_read_thread (ctx=0xa12de3c, argv=0x25)
    at connection.c:1434
#25 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#26 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#27 0x0 in ?? ()

Thread 5 (process 68556, thread 13):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0xa534000, txn=0xf068a00, dn=0x9d2a860, 
    ei=0x9d2a854) at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0xa534000, txn=0xf068a00, 
    ndn=0x9d2db8c, res=0x9d2a8a8) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0xa534000, tid=0xf068a00, dn=0x9d2db8c, 
    e=0x9d2a91c, matched=1, locker=2147483689, lock=0x9d2a944) at dn2entry.c:48
#20 0x80f7666 in bdb_add (op=0xa534000, rs=0x9d2ad70) at add.c:138
#21 0x8079546 in fe_op_add (op=0xa534000, rs=0x9d2ad70) at add.c:340
#22 0x8079150 in do_add (op=0xa534000, rs=0x9d2ad70) at add.c:182
#23 0x8073c78 in connection_operation (ctx=0x9d2ae3c, arg_v=0xa534000)
    at connection.c:1307
#24 0x8073fe7 in connection_read_thread (ctx=0x9d2ae3c, argv=0x10)
    at connection.c:1434
#25 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#26 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#27 0x0 in ?? ()

Thread 4 (process 68556, thread 9):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185c48 in lutil_debug (debug=261, level=1, 
    fmt=0x819dc70 "oc_check_allowed type \"%s\"\n") at debug.c:72
#6  0x809d480 in oc_check_allowed (at=0x8259e00, ocl=0xa130820, sc=0x829eb80)
    at schema_check.c:527
#7  0x809d315 in entry_schema_check (op=0xa534200, e=0xbb4372c, 
    oldattrs=0xe863720, manage=0, text=0xbb43d84, textbuf=0xbb4376c "", 
    textlen=256) at schema_check.c:460
#8  0x80c722d in bdb_modify_internal (op=0xa534200, tid=0xe75d300, 
    modlist=0xe4575c0, e=0xbb4372c, text=0xbb43d84, textbuf=0xbb4376c "", 
    textlen=256) at modify.c:208
#9  0x80c7d77 in bdb_modify (op=0xa534200, rs=0xbb43d70) at modify.c:481
#10 0x808602c in fe_op_modify (op=0xa534200, rs=0xbb43d70) at modify.c:400
#11 0x80857c2 in do_modify (op=0xa534200, rs=0xbb43d70) at modify.c:200
#12 0x8073c78 in connection_operation (ctx=0xbb43e3c, arg_v=0xa534200)
    at connection.c:1307
#13 0x8073fe7 in connection_read_thread (ctx=0xbb43e3c, argv=0x1d)
    at connection.c:1434
#14 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#15 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#16 0x0 in ?? ()

Thread 3 (process 68556, thread 16):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x28fafa01 in select () from /usr/lib/libc_r.so.4
#4  0x8165a1c in ldap_pvt_thread_yield () at thr_posix.c:217
#5  0x282e32e9 in __os_yield () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#15 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#16 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#17 0x80fda1b in bdb_dn2id (op=0xa534800, txn=0xf068900, dn=0x8c1d860, 
    ei=0x8c1d854) at dn2id.c:271
#18 0x80f940d in bdb_cache_find_ndn (op=0xa534800, txn=0xf068900, 
    ndn=0xc146a4c, res=0x8c1d8a8) at cache.c:330
#19 0x80fd0b2 in bdb_dn2entry (op=0xa534800, tid=0xf068900, dn=0xc146a4c, 
    e=0x8c1d91c, matched=1, locker=2147483688, lock=0x8c1d944) at dn2entry.c:48
#20 0x80f7666 in bdb_add (op=0xa534800, rs=0x8c1dd70) at add.c:138
#21 0x8079546 in fe_op_add (op=0xa534800, rs=0x8c1dd70) at add.c:340
#22 0x8079150 in do_add (op=0xa534800, rs=0x8c1dd70) at add.c:182
#23 0x8073c78 in connection_operation (ctx=0x8c1de3c, arg_v=0xa534800)
    at connection.c:1307
#24 0x8073fe7 in connection_read_thread (ctx=0x8c1de3c, argv=0x19)
    at connection.c:1434
#25 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#26 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#27 0x0 in ?? ()

Thread 2 (process 68556, thread 6):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fad41c in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x2823da89 in __db_tas_mutex_lock () from /usr/pkg/lib/libdb-4.4.so.0
#4  0x282c7872 in __lock_get_internal () from /usr/pkg/lib/libdb-4.4.so.0
#5  0x282c6e83 in __lock_get () from /usr/pkg/lib/libdb-4.4.so.0
#6  0x282a7dc8 in __db_lget () from /usr/pkg/lib/libdb-4.4.so.0
#7  0x2824c95c in __bam_get_root () from /usr/pkg/lib/libdb-4.4.so.0
#8  0x2824cc78 in __bam_search () from /usr/pkg/lib/libdb-4.4.so.0
#9  0x28242c80 in __bam_c_search () from /usr/pkg/lib/libdb-4.4.so.0
#10 0x282401b5 in __bam_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#11 0x2829cafc in __db_c_get () from /usr/pkg/lib/libdb-4.4.so.0
#12 0x282a32e3 in __db_get () from /usr/pkg/lib/libdb-4.4.so.0
#13 0x282a31b3 in __db_get_pp () from /usr/pkg/lib/libdb-4.4.so.0
#14 0x80fda1b in bdb_dn2id (op=0x82c0e00, txn=0xf86d100, dn=0xd24b9f0, 
    ei=0xd24b9e4) at dn2id.c:271
#15 0x80f940d in bdb_cache_find_ndn (op=0x82c0e00, txn=0xf86d100, 
    ndn=0xd24ba94, res=0xd24ba88) at cache.c:330
#16 0x80c9551 in bdb_modrdn (op=0x82c0e00, rs=0xd24bd70) at modrdn.c:512
#17 0x8087e46 in fe_op_modrdn (op=0x82c0e00, rs=0xd24bd70) at modrdn.c:317
#18 0x80879d5 in do_modrdn (op=0x82c0e00, rs=0xd24bd70) at modrdn.c:185
#19 0x8073c78 in connection_operation (ctx=0xd24be3c, arg_v=0x82c0e00)
    at connection.c:1307
#20 0x8073fe7 in connection_read_thread (ctx=0xd24be3c, argv=0x14)
    at connection.c:1434
#21 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#22 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#23 0x0 in ?? ()

Thread 1 (process 68556, thread 1):
#0  0x28fb20db in _thread_kern_sched () from /usr/lib/libc_r.so.4
#1  0x28fb28b8 in _thread_kern_sched_state () from /usr/lib/libc_r.so.4
#2  0x28fb5314 in _flockfile_debug () from /usr/lib/libc_r.so.4
#3  0x28fb53ba in flockfile () from /usr/lib/libc_r.so.4
#4  0x28fce88d in fputs () from /usr/lib/libc_r.so.4
#5  0x8185697 in ber_error_print (
    data=0x91216ec "<= ldap_dn2bv(cn=bjorn jensen,ou=information technology division,ou=people,dc=example,dc=com)=0 Success\n") at bprint.c:79
#6  0x8179456 in ldap_log_printf (ld=0x0, loglvl=1, 
    fmt=0x8203537 "<= ldap_dn2bv(%s)=%d %s\n") at print.c:60
#7  0x8172c11 in ldap_dn2bv_x (dn=0xa535224, bv=0xa53441c, flags=272, 
    ctx=0x9d2b900) at getdn.c:3313
#8  0x8083b39 in dnPrettyNormal (syntax=0x0, val=0x9121c04, pretty=0xa534414, 
    normal=0xa53441c, ctx=0x9d2b900) at dn.c:934
#9  0x80856de in do_modify (op=0xa534400, rs=0x9121d70) at modify.c:178
#10 0x8073c78 in connection_operation (ctx=0x9121e3c, arg_v=0xa534400)
    at connection.c:1307
#11 0x8073fe7 in connection_read_thread (ctx=0x9121e3c, argv=0x17)
    at connection.c:1434
#12 0x8165155 in ldap_int_thread_pool_wrapper (xpool=0x825d480) at tpool.c:615
#13 0x28f744d8 in _thread_start () from /usr/lib/libc_r.so.4
#14 0x0 in ?? ()
#0  0x28fb3858 in __sys_poll () from /usr/lib/libc_r.so.4
Follow-Ups:
- Re: ITS#3950
  - From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
References:
- ITS#3950
  - From: Quanah Gibson-Mount <quanah@stanford.edu>
- Re: ITS#3950
  - From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
- Re: ITS#3950
  - From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
- Re: ITS#3950
  - From: Howard Chu <hyc@symas.com>
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