the memcached main process can't accept connect when use
assoc_maintenance_thread function,here is the gdb bt result:
we have 4 thread :
|-memcached,28059 -d -p 12111 -c 8192 -m 16384 -u root -l 127.0.0.1
| |-{memcached},28060
| |-{memcached},28061
| |-{memcached},28062
| |-{memcached},28063
| `-{memcached},28064
gdb bt result:
gdb -p 28060
GNU gdb Fedora (6.8-37.el5)
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 "x86_64-redhat-linux-gnu".
Attaching to process 28060
warning: process 28060 is a cloned process
Reading symbols from /usr/local/sinawap/bin/memcached...done.
Reading symbols from /usr/local/sinawap/lib/libevent-1.4.so.2...done.
Loaded symbols for /usr/local/sinawap/lib/libevent-1.4.so.2
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ec05b86e0 (LWP 28059)]
[New Thread 0x434f2940 (LWP 28064)]
[New Thread 0x42cf1940 (LWP 28063)]
[New Thread 0x424f0940 (LWP 28062)]
[New Thread 0x41cef940 (LWP 28061)]
[New Thread 0x414ee940 (LWP 28060)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.0
(gdb) bt
#0 0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.
0
#1 0x0000003095a08e1a in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x0000003095a08cdc in pthread_mutex_lock () from /lib64/
libpthread.so.0
#3 0x000000000040d08e in item_get (key=0x7f2cf8ac1424
"ttt_newuser_2272938860", nkey=128) at thread.c:343
#4 0x0000000000403c14 in process_get_command (c=0x7f2d3888f080,
tokens=0x414eded0, ntokens=0, return_cas=false)
at memcached.c:2542
#5 0x0000000000408256 in process_command (c=0x7f2d3888f080,
command=<value optimized out>) at memcached.c:2975
#6 0x0000000000408bfe in try_read_command (c=0x7f2d3888f080) at
memcached.c:3185
#7 0x000000000040989d in event_handler (fd=<value optimized out>,
which=128, arg=0x7f2d3888f080) at memcached.c:3491
#8 0x00007f2ec05c25f8 in event_base_loop (base=0x63f420, flags=0) at
event.c:392
#9 0x000000000040cbb4 in worker_libevent (arg=0x633f70) at thread.c:
245
#10 0x0000003095a0673d in start_thread () from /lib64/libpthread.so.0
#11 0x00000030952d44bd in clone () from /lib64/libc.so.6
gdb -p 28061
GNU gdb Fedora (6.8-37.el5)
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 "x86_64-redhat-linux-gnu".
Attaching to process 28061
warning: process 28061 is a cloned process
Reading symbols from /usr/local/sinawap/bin/memcached...done.
Reading symbols from /usr/local/sinawap/lib/libevent-1.4.so.2...done.
Loaded symbols for /usr/local/sinawap/lib/libevent-1.4.so.2
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ec05b86e0 (LWP 28059)]
[New Thread 0x434f2940 (LWP 28064)]
[New Thread 0x42cf1940 (LWP 28063)]
[New Thread 0x424f0940 (LWP 28062)]
[New Thread 0x41cef940 (LWP 28061)]
[New Thread 0x414ee940 (LWP 28060)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.0
(gdb) bt
#0 0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.
0
#1 0x0000003095a08e1a in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x0000003095a08cdc in pthread_mutex_lock () from /lib64/
libpthread.so.0
#3 0x000000000040d0f6 in item_alloc (key=0x7f2cd3a2a0a4
"ttt_api_unread_2557924625", nkey=128, flags=0,
exptime=4294967295, nbytes=6395456) at thread.c:331
#4 0x0000000000407fa7 in process_update_command (c=0x7f2ebc16e900,
tokens=<value optimized out>,
ntokens=<value optimized out>, comm=2, handle_cas=false) at
memcached.c:2728
#5 0x00000000004083be in process_command (c=0x7f2ebc16e900,
command=<value optimized out>) at memcached.c:2984
#6 0x0000000000408bfe in try_read_command (c=0x7f2ebc16e900) at
memcached.c:3185
#7 0x000000000040989d in event_handler (fd=<value optimized out>,
which=128, arg=0x7f2ebc16e900) at memcached.c:3491
#8 0x00007f2ec05c25f8 in event_base_loop (base=0x658130, flags=0) at
event.c:392
#9 0x000000000040cbb4 in worker_libevent (arg=0x636c98) at thread.c:
245
#10 0x0000003095a0673d in start_thread () from /lib64/libpthread.so.0
#11 0x00000030952d44bd in clone () from /lib64/libc.so.6
gdb -p 28062
GNU gdb Fedora (6.8-37.el5)
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 "x86_64-redhat-linux-gnu".
Attaching to process 28062
warning: process 28062 is a cloned process
Reading symbols from /usr/local/sinawap/bin/memcached...done.
Reading symbols from /usr/local/sinawap/lib/libevent-1.4.so.2...done.
Loaded symbols for /usr/local/sinawap/lib/libevent-1.4.so.2
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ec05b86e0 (LWP 28059)]
[New Thread 0x434f2940 (LWP 28064)]
[New Thread 0x42cf1940 (LWP 28063)]
[New Thread 0x424f0940 (LWP 28062)]
[New Thread 0x41cef940 (LWP 28061)]
[New Thread 0x414ee940 (LWP 28060)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.0
(gdb) bt
#0 0x0000003095a0d524 in __lll_lock_wait () from /lib64/libpthread.so.
0
#1 0x0000003095a08e1a in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x0000003095a08cdc in pthread_mutex_lock () from /lib64/
libpthread.so.0
#3 0x000000000040d08e in item_get (key=0x7f2cdedceb84
"iphone_2283873065_2012042520", nkey=128) at thread.c:343
#4 0x0000000000403c14 in process_get_command (c=0x7f2d3861ff20,
tokens=0x424efed0, ntokens=0, return_cas=false)
at memcached.c:2542
#5 0x0000000000408256 in process_command (c=0x7f2d3861ff20,
command=<value optimized out>) at memcached.c:2975
#6 0x0000000000408bfe in try_read_command (c=0x7f2d3861ff20) at
memcached.c:3185
#7 0x000000000040989d in event_handler (fd=<value optimized out>,
which=128, arg=0x7f2d3861ff20) at memcached.c:3491
#8 0x00007f2ec05c25f8 in event_base_loop (base=0x690ed0, flags=0) at
event.c:392
#9 0x000000000040cbb4 in worker_libevent (arg=0x6399c0) at thread.c:
245
#10 0x0000003095a0673d in start_thread () from /lib64/libpthread.so.0
#11 0x00000030952d44bd in clone () from /lib64/libc.so.6
gdb -p 28063
GNU gdb Fedora (6.8-37.el5)
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 "x86_64-redhat-linux-gnu".
Attaching to process 28063
warning: process 28063 is a cloned process
Reading symbols from /usr/local/sinawap/bin/memcached...done.
Reading symbols from /usr/local/sinawap/lib/libevent-1.4.so.2...done.
Loaded symbols for /usr/local/sinawap/lib/libevent-1.4.so.2
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ec05b86e0 (LWP 28059)]
[New Thread 0x434f2940 (LWP 28064)]
[New Thread 0x42cf1940 (LWP 28063)]
[New Thread 0x424f0940 (LWP 28062)]
[New Thread 0x41cef940 (LWP 28061)]
[New Thread 0x414ee940 (LWP 28060)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
0x000000000040c2d1 in assoc_find (key=0x7f2d231264f4
"TC_db784e309e27b22873f62c3329d032c9", nkey=35) at assoc.c:85
85 if ((nkey == it->nkey) && (memcmp(key, ITEM_key(it),
nkey) == 0)) {
(gdb) bt
#0 0x000000000040c2d1 in assoc_find (key=0x7f2d231264f4
"TC_db784e309e27b22873f62c3329d032c9", nkey=35) at assoc.c:85
#1 0x000000000040ba1e in do_item_get (key=0xbef4bc56 <Address
0xbef4bc56 out of bounds>, nkey=3432596860) at items.c:466
#2 0x000000000040d099 in item_get (key=0x7f2d231264f4
"TC_db784e309e27b22873f62c3329d032c9", nkey=35) at thread.c:344
#3 0x0000000000403c14 in process_get_command (c=0x7f2d6227cb00,
tokens=0x42cf0ed0, ntokens=25009664, return_cas=false)
at memcached.c:2542
#4 0x0000000000408256 in process_command (c=0x7f2d6227cb00,
command=<value optimized out>) at memcached.c:2975
#5 0x0000000000408bfe in try_read_command (c=0x7f2d6227cb00) at
memcached.c:3185
#6 0x000000000040989d in event_handler (fd=<value optimized out>,
which=17788, arg=0x7f2d6227cb00) at memcached.c:3491
#7 0x00007f2ec05c25f8 in event_base_loop (base=0x6a9c70, flags=0) at
event.c:392
#8 0x000000000040cbb4 in worker_libevent (arg=0x63c6e8) at thread.c:
245
#9 0x0000003095a0673d in start_thread () from /lib64/libpthread.so.0
#10 0x00000030952d44bd in clone () from /lib64/libc.so.6
gdb -p 28064
GNU gdb Fedora (6.8-37.el5)
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 "x86_64-redhat-linux-gnu".
Attaching to process 28064
warning: process 28064 is a cloned process
Reading symbols from /usr/local/sinawap/bin/memcached...done.
Reading symbols from /usr/local/sinawap/lib/libevent-1.4.so.2...done.
Loaded symbols for /usr/local/sinawap/lib/libevent-1.4.so.2
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x7f2ec05b86e0 (LWP 28059)]
[New Thread 0x434f2940 (LWP 28064)]
[New Thread 0x42cf1940 (LWP 28063)]
[New Thread 0x424f0940 (LWP 28062)]
[New Thread 0x41cef940 (LWP 28061)]
[New Thread 0x414ee940 (LWP 28060)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
0x0000003095a0aee9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/
libpthread.so.0
(gdb) bt
#0 0x0000003095a0aee9 in pthread_cond_wait@@GLIBC_2.3.2 () from /
lib64/libpthread.so.0
#1 0x000000000040c10c in assoc_maintenance_thread (arg=<value
optimized out>) at assoc.c:223
#2 0x0000003095a0673d in start_thread () from /lib64/libpthread.so.0
#3 0x00000030952d44bd in clone () from /lib64/libc.so.6
