Folks,
I'm trying to trace down a TCP_NODELAY problem and wanted to see if it
exists on the latest connector mod_jk2. So I configured Apache 2.0.42,
Tomcat 4.1.12 and downloaded jakarta-tomcat-connectors-4.1.12-src. I
managed to use GNU's libtoolize to configure (./configure
--with-apxs2=/usr/local/apache2/bin/apxs
--with-apr-lib=/usr/local/apache2/lib
--with-apr-include=/usr/local/apache2/include
--with-tomcat1=/usr/local/jakarta-tomcat-4.1.12).
The compilation was successful and I copied mod_jk2.so to
/usr/local/apache2/modules. I configured httpd.conf to load the module
and appended the following:
<IfModule mod_jk2.c>
JkSet "config.file" "/usr/local/apache2/conf/workers2.properties"
</IfModule>
I added a super simple workers2.properties file in the same dir and
tried to start apache. I got a seg fault. Here's the stacktrace from
Mac OS X default crash logger:
Command: httpd
PID: 853
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0x736f0028
Thread 0 Crashed:
#0 0x90001600 in strlen
#1 0x900023e0 in vfprintf
#2 0x90015ee0 in __sbprintf
#3 0x900018a8 in vfprintf
#4 0x900017ec in fprintf
#5 0x0060fdbc in jk2_map_default_get (jk_map.c:97) <-- it's '97'
because I added printf
#6 0x0060df50 in jk2_env_createBean2 (jk_env.c:218)
#7 0x0061ee0c in jk2_create_config (mod_jk2.c:351)
#8 0x0002214c in ap_single_module_configure (config.c:1845)
#9 0x00007ad8 in load_module (mod_so.c:337)
#10 0x00020308 in invoke_cmd (config.c:749)
#11 0x000213d0 in execute_now (config.c:1347)
#12 0x00020a40 in ap_build_config_sub (config.c:944)
#13 0x00020f68 in ap_build_config (config.c:1151)
#14 0x000218f0 in ap_process_resource_config (config.c:1556)
#15 0x000220e8 in ap_read_config (config.c:1834)
#16 0x0000c184 in main (main.c:615)
#17 0x00001ae0 in _start (crt.c:267)
#18 0x00001960 in start
Here's output with some printf statements inserted in jk_map.c:
entering for threadMutex (no. maps: 25)
0: logger.file (�Z�Z�Z�Z�Z�Z) <- funny output is from
fprintf(stderr,"%s", mPriv->values[i])
1: logger.win32 (�Z�Z�Z�Z�Z)
2: workerEnv (�Z�ZA�Z�Z)
3: uriMap (�Z�Za�Z�Z)
4: uriEnv (�Z�ZA�Z�Z)
5: endpoint (�Z�ZA�Z�Z)
6: uri (�Z�ZA�Z�Z)
7: config (�Z�Z�Z�Z�Z�Z)
8: ajp13 (�Z�ZA�Z�Z)
9: lb (,)
10: status (�Z�Z�Z�Z�Z)
11: run (,)
12: channel.un (�Z�ZA�Z�Z)
13: channel.apr (�Z�ZA�Z�Z)
14: shm (�Z�Z�Z�Z�Z�Z)
15: channel.socket (�Z�ZA�Z�Z)
16: handler.response (�Z�Z�Z�Z�Z�Z)
17: handler.logon (�Z�Z�Z�Z�Z�Z)
18: threadMutex (�Z�Z�Z�Z�Z�Z)
done for threadMutex
entering for logger.apache2: (no. maps: 1)
0: threadMutex:0 ()
done for logger.apache2:
...
...
entering for uri:/examples/* (no. maps: 19)
0: threadMutex:0 ()
1: logger.apache2: ()
2: logger.apache2 ()
3: logger ()
4: uriMap: ()
5: uriMap ()
6: config: ()
7: config ()
8: shm: ()
9: shm ()
10: workerEnv: ()
11: workerEnv ()
12: uri: ()
13: uri ()
14: threadMutex:1 ()
15: threadMutex:2 ()
16: threadMutex:3 ()
17: ajp13:localhost:8009 ()
18: channel.socket:localhost:8009 ()
done for uri:/examples/*
entering for uri (no. maps: 26)
0: logger.file (�Z�Z�Z�Z�Z�Z)
1: logger.win32 (�Z�Z�Z�Z�Z)
2: workerEnv (�Z�ZA�Z�Z)
3: uriMap (�Z�Za�Z�Z)
4: uriEnv (�Z�ZA�Z�Z)
5: endpoint (�Z�ZA�Z�Z)
6: uri (�Z�ZA�Z�Z)
done for uri
entering for workerEnv (no. maps: 19)
0: threadMutex:0 ()
1: logger.apache2: ()
2: logger.apache2 ()
3: logger ()
4: uriMap: ()
5: uriMap ()
6: config: ()
7: config ()
8: shm: ()
9: shm ()
10: workerEnv: ()
11: workerEnv ()
done for workerEnv
entering for ver (no. maps: 1)
0: worker (ajp13:localhost:8009)
done for ver
[here it churns for a few seconds before segfaulting]
bin/apachectl: line 87: 853 Segmentation fault $HTTPD -k $ARGV
Anyone has a clue on what could be wrong? Just pointers would help. I
tried following the stack trace but am temporarily thrown off by how
jk2_env_createBean2() gets to jk2_map_default_get(), especially the
second parameter's type. It seems to be casted from (char *) to
(jk_map_t *), which is kind of weird.
Appreciate it.
Han Ming
#------------------------ workers2.properties
--------------------------------
# Shared memory handling. Needs to be set.
[shm]
file=/usr/local/apache2/logs/shm.file
size=1048576
# Example socket channel, explicitly set port and host.
[channel.socket:localhost:8009]
port=8009
host=127.0.0.1
#keepalive=1
# define the worker
[ajp13:localhost:8009]
# channel=channel.un:/usr/local/tomcat/work/jk2.socket
# To use the TCP/IP socket instead, just comment out the above
# line, and uncomment the one below
channel=channel.socket:localhost:8009
# Announce a "status" worker
[status:status]
# Uri mapping
[uri:/examples/*]
worker=ajp13:localhost:8009
#worker=ajp13:/usr/local/tomcat/work/jk2.socket
[uri:/jkstatus/*]
worker=status:status
#---- end of workers2.properties
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