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http://issues.apache.org/bugzilla/show_bug.cgi?id=39079





------- Additional Comments From [EMAIL PROTECTED]  2006-03-27 12:13 -------
No really. It's only  3 threads.

Here's another example
(23999 is the LWP that's consuming all CPU)
$ sudo gdb /local/apache-cache/bin/httpd 23999
### initital output "Loading symbols..." removed ###
(gdb) thread apply all bt full
Thread 3 (Thread -1498559568 (LWP 24034)):
#0  0x080705bc in ap_core_input_filter (f=0x84170c8, b=0x854bf68, 
    mode=AP_MODE_READBYTES, block=APR_NONBLOCK_READ, readbytes=8192)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 2 (Thread -1540523088 (LWP 24039)):
#0  0x080705e1 in ap_core_input_filter (f=0x84170c8, b=0x8565278, 
    mode=AP_MODE_GETLINE, block=APR_BLOCK_READ, readbytes=0)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 1 (Thread -1212471616 (LWP 23999)):
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7ce6f98 in pthread_join () from /lib/libpthread.so.0
No symbol table info available.
#2  0xb7d558d1 in apr_thread_join (retval=0xbfa1e6d8, thd=0x8106d78)
    at threadproc/unix/thread.c:214
        stat = Variable "stat" is not available.
(gdb)  quit
The program is running.  Quit anyway (and detach it)? (y or n) y
Detaching from program: /software/apache-cache-2.2.0/bin/httpd, process 23999

### wait 10 seconds ###
$  sudo gdb /local/apache-cache/bin/httpd 23999
(gdb) thread apply all bt full

Thread 3 (Thread -1498559568 (LWP 24034)):
#0  0x080705bc in ap_core_input_filter (f=0x84170c8, b=0x854bf68, 
    mode=AP_MODE_READBYTES, block=APR_NONBLOCK_READ, readbytes=8192)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 2 (Thread -1540523088 (LWP 24039)):
#0  0x080705d3 in ap_core_input_filter (f=0x84170c8, b=0x8565278, 
    mode=AP_MODE_GETLINE, block=APR_BLOCK_READ, readbytes=0)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 1 (Thread -1212471616 (LWP 23999)):
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7ce6f98 in pthread_join () from /lib/libpthread.so.0
No symbol table info available.
#2  0xb7d558d1 in apr_thread_join (retval=0xbfa1e6d8, thd=0x8106d78)
    at threadproc/unix/thread.c:214
        stat = Variable "stat" is not available.
(gdb) 

### and once more ####
(gdb) thread apply all bt full

Thread 3 (Thread -1498559568 (LWP 24034)):
#0  0x080705bf in ap_core_input_filter (f=0x84170c8, b=0x854bf68, 
    mode=AP_MODE_READBYTES, block=APR_NONBLOCK_READ, readbytes=8192)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 2 (Thread -1540523088 (LWP 24039)):
#0  0x080705d9 in ap_core_input_filter (f=0x84170c8, b=0x8565278, 
    mode=AP_MODE_GETLINE, block=APR_BLOCK_READ, readbytes=0)
    at core_filters.c:141
        e = (apr_bucket *) 0x84170fc
        e = Variable "e" is not available.

Thread 1 (Thread -1212471616 (LWP 23999)):
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7ce6f98 in pthread_join () from /lib/libpthread.so.0
No symbol table info available.
#2  0xb7d558d1 in apr_thread_join (retval=0xbfa1e6d8, thd=0x8106d78)
    at threadproc/unix/thread.c:214
        stat = Variable "stat" is not available.
(gdb) 

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