Re: test001-slapdadd stalled (ITS#679)

[manabu@iij.ad.jp]

Hi, Kurt.

Date: Sat, 09 Sep 2000 18:11:50 -0700
Subject: Re: test001-slapdadd stalled (ITS#679)
From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org> sez:

:the deadlock (apparently on c_mutex).  If you have a thread
:aware debugger, you can help by attaching to the deadlock'ed
:process and obtaining a stack trace for each thread.

Well, here's 'bt' results by gdb.

---from  
(gdb) attach 2485
Attaching to program `/var/tmp/openldap-2.0.1/servers/slapd/slapd', process 2485    
0x48187575 in _syscall_sys_select ()
(gdb) bt
#0  0x48187575 in _syscall_sys_select ()
#1  0x48218028 in _thread_aio_poll ()
#2  0x48213b59 in _thread_kern_switch ()
#3  0x48213fc5 in _thread_kern_block ()
#4  0x482144e6 in pthread_mutex_lock ()
#5  0x807b13b in ldap_pvt_thread_mutex_lock (mutex=0x81ce548)
    at thr_posix.c:207
#6  0x805a121 in do_bind (conn=0x81ce540, op=0x81cd580) at bind.c:56
#7  0x804e309 in connection_operation (arg_v=0x81cca60) at connection.c:767
#8  0x807af64 in ldap_int_thread_pool_wrapper (pool=0x81b3080) at tpool.c:377
#9  0x48213d7c in _thread_kern_start ()
(gdb) info threads
* 6 thread 0x8159600  0x48187575 in _syscall_sys_select ()
  5 thread 0x8159500  0x48213c20 in _thread_kern_switch ()
  4 thread 0x8159200  0x48213c20 in _thread_kern_switch ()
(gdb) thread 6
[Switching to thread 0x8159600]
#0  0x48187575 in _syscall_sys_select ()
(gdb) bt
#0  0x48187575 in _syscall_sys_select ()
#1  0x48218028 in _thread_aio_poll ()
#2  0x48213b59 in _thread_kern_switch ()
#3  0x48213fc5 in _thread_kern_block ()
#4  0x482144e6 in pthread_mutex_lock ()
#5  0x807b13b in ldap_pvt_thread_mutex_lock (mutex=0x81ce548)
    at thr_posix.c:207
#6  0x805a121 in do_bind (conn=0x81ce540, op=0x81cd580) at bind.c:56
#7  0x804e309 in connection_operation (arg_v=0x81cca60) at connection.c:767
#8  0x807af64 in ldap_int_thread_pool_wrapper (pool=0x81b3080) at tpool.c:377
#9  0x48213d7c in _thread_kern_start ()
(gdb) thread 5
[Switching to thread 0x8159500]
#0  0x48213c20 in _thread_kern_switch ()
(gdb) bt
#0  0x48213c20 in _thread_kern_switch ()
#1  0x48213fc5 in _thread_kern_block ()
#2  0x482181ea in _thread_aio_suspend ()
#3  0x48218de4 in _thread_sys_read ()
#4  0x808ca91 in sb_stream_read (sbiod=0x81cbb00, buf=0x81d9000, len=16384)
    at sockbuf.c:449
#5  0x808cd07 in sb_rdahead_read (sbiod=0x81cbb20, buf=0x81c4b10, len=1)
    at sockbuf.c:613
#6  0x808d065 in sb_debug_read (sbiod=0x81cbb40, buf=0x81c4b10, len=1)
    at sockbuf.c:779
#7  0x808c98e in ber_int_sb_read (sb=0x81cba20, buf=0x81c4b10, len=1)
    at sockbuf.c:366
#8  0x808b4b1 in ber_get_next (sb=0x81cba20, len=0x4828966c, ber=0x81c4b00)
    at io.c:509
#9  0x804e802 in connection_input (conn=0x81ce540) at connection.c:1024
#10 0x804e6ce in connection_read (s=7) at connection.c:983
#11 0x804cd77 in slapd_daemon_task (ptr=0x0) at daemon.c:1135
#12 0x48213d7c in _thread_kern_start ()
(gdb)  thread 4
[Switching to thread 0x8159200]
#0  0x48213c20 in _thread_kern_switch ()
(gdb) bt
#0  0x48213c20 in _thread_kern_switch ()
#1  0x48213fc5 in _thread_kern_block ()
#2  0x48213908 in pthread_join ()
#3  0x807b0a2 in ldap_pvt_thread_join (thread=0x8159500, thread_return=0x0)
    at thr_posix.c:123
#4  0x804cfb1 in slapd_daemon () at daemon.c:1206
#5  0x804add8 in main (argc=7, argv=0x80478a0) at main.c:425
#6  0x804a827 in __start ()
(gdb) 
---end

-- 
Manabu Kondo / manabu@iij.ad.jp