Subject: Anyone using mysql replication on -current?
To: None <firstname.lastname@example.org>
From: Andrew Gillham <email@example.com>
Date: 06/28/2003 23:12:15
I have a 1.6R i386 machine running mysqld. I setup a second, 1.6U
(-current updated in the last 1-2 days) i386 system with mysqld as well.
When I enable replication, it works fine, but I can't shutdown mysqld
any longer. The replication thread won't die. The process is in
'sigwait' according to top, and I have to use 'kill -9' to stop the
I rebuilt mysqld with the include mit-pthreads and I don't have this
So... Since this seems to be an issue with our native pthreads, and I am
able to reproduce it on demand, how do I go about debugging it?
I have tried the following:
# setenv PTHREAD_ERRORMODE print
# setenv PTHREAD_DEBUGCOUNTERS 1
# setenv PTHREAD_DEBUGLOG 1
# /usr/pkg/etc/rc.d/mysqld start
# debuglog -r > log.txt
Attaching with gdb looks like this:
Switching to Thread 21 ()]
---Type <return> to continue, or q <return> to quit---
0x4823f49f in __sigtimedwait () from /usr/lib/libc.so.12
#0 0x4823f49f in __sigtimedwait () from /usr/lib/libc.so.12
#1 0x4818cbbf in sigtimedwait () from /usr/lib/libpthread.so.0
#2 0x482119fb in sigwait () from /usr/lib/libc.so.12
#3 0x807b035 in dladdr ()
#4 0x481922e2 in pthread_create () from /usr/lib/libpthread.so.0
(gdb) info threads
4 Thread 0 () 0x482103d3 in select () from /usr/lib/libc.so.12
* 3 Thread 21 () 0x4823f49f in __sigtimedwait () from /usr/lib/libc.so.12
2 Thread 22 () 0x4821041b in read () from /usr/lib/libc.so.12
1 Thread 24 () 0x4818c07b in pthread__locked_switch ()
With top the mysqld process is in 'sigwait' as Thread 21 is shown.
What else should I collect before using send-pr?