Hello,
I posted a couple of other threads with no replies. I
realize this is a complicated problem, but I would
really, really be thankful for any help.
Though I seem to have gotten rid of some of the
previous problems I was having with mod_jk requests
getting frozen (by getting rid of the recycle_timeout,
socket_keepalive and socket_timeout settings), I'm
still having problems.
PROBLEM SCENARIO:
1. Client has its requests go through for a while.
(Apache keepalive is true, so it keeps open a
connection.)
2. Client is idle for a while.
3. Client's next request after being idle for a while
SOMETIMES gets stuck after we redirect the client's
request.
Below is a mod_jk log of the stuck redirect request.
We receive it, but it seems to be getting stuck in
mod_jk on "request body to send 0 - request body to
resend 0". (Though we've had it get stuck in other
places, like "maintaining worker".)
If the client then resubmits the EXACT same request,
it goes through.
As I mentioned in the other two threads over the last
few days, the client first does a POST, then the
server redirects the POST to a GET. The POST always
goes through. The GET sometimes gets stuck.
Here's the end of the client's POST (which is to tell
it to redirect):
#####################################
<SNIP>
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_connection_tcp_get_message::jk_ajp_common.c
(1037): 0070 4F 2D 38 38 35 39 2D 31 00 00 0E 43 6F
6E 74 65 - O-8859-1...Conte
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_connection_tcp_get_message::jk_ajp_common.c
(1037): 0080 6E 74 2D 4C 65 6E 67 74 68 00 00 01 30
00 00 00 - nt-Length...0...
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_unmarshal_response::jk_ajp_common.c (621): status
= 302
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_unmarshal_response::jk_ajp_common.c (628): Number
of headers is = 3
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_unmarshal_response::jk_ajp_common.c (684):
Header[0] [Location] =
[http://www.sitemadness.com/index.jsp]
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_unmarshal_response::jk_ajp_common.c (684):
Header[1] [Content-Type] =
[text/html;charset=ISO-8859-1]
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_unmarshal_response::jk_ajp_common.c (684):
Header[2] [Content-Length] = [0]
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_connection_tcp_get_message::jk_ajp_common.c
(1037): received from ajp13 pos=0 len=2 max=8192
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_connection_tcp_get_message::jk_ajp_common.c
(1037): 0000 05 01 00 00 00 00 00 00 00 00 00 00 00
00 00 00 - ................
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
ajp_done::jk_ajp_common.c (2074): recycling connection
cache slot=1 for worker app01
[Sat Feb 25 17:27:27 2006] [19074:14688] app01
www.sitemadness.com 0.008015 POST /index.jsp
[Sat Feb 25 17:27:27 2006] [19074:14688] [debug]
jk_handler::mod_jk.c (1969): Service finished with
status=302 for worker=app01
#####################################
Now here's the resulting redirect GET that gets stuck:
#####################################
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
map_uri_to_worker::jk_uri_worker_map.c (449):
Attempting to map URI '/index.jsp' from 3 maps
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
map_uri_to_worker::jk_uri_worker_map.c (461):
Attempting to map context URI '/services/*'
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
map_uri_to_worker::jk_uri_worker_map.c (461):
Attempting to map context URI '/servlet/*'
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
map_uri_to_worker::jk_uri_worker_map.c (461):
Attempting to map context URI '/*.jsp'
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
map_uri_to_worker::jk_uri_worker_map.c (475): Found a
wildchar match app01 -> /*.jsp
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
jk_handler::mod_jk.c (1839): Into handler
jakarta-servlet worker=app01 r->proxyreq=0
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
wc_get_worker_for_name::jk_worker.c (111): found a
worker app01
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
wc_maintain::jk_worker.c (301): Maintaining worker
app01
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
init_ws_service::mod_jk.c (531): Service
protocol=HTTP/1.1 method=GET host=(null)
addrr=68.125.183.79 name=www.sitemadness.com port=80
auth=(null) user=(null) laddr=64.62.148.62
raddr=68.125.183.79
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_get_endpoint::jk_ajp_common.c (2131): acquired
connection cache slot=0
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_marshal_into_msgb::jk_ajp_common.c (566): ajp
marshaling done
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_service::jk_ajp_common.c (1670): processing with 3
retries
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): sending to ajp13 pos=4 len=569 max=8192
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0000 12 34 02 35 02 02 00 08 48 54 54 50 2F
31 2E 31 - .4.5....HTTP/1.1
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0010 00 00 0A 2F 69 6E 64 65 78 2E 6A 73 70
00 00 0D - .../index.jsp...
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0020 36 38 2E 31
<SNIP>
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0210 38 43 39 33 34 42 42 33 42 41 42 35 32
43 33 35 - 8C934BB3BAB52C35
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0220 33 33 41 42 38 31 36 37 32 38 32 2E 61
70 70 30 - 33AB8167282.app0
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c
(909): 0230 31 00 A0 08 00 01 30 00 FF 00 00 00 00
00 00 00 - 1.....0.........
[Sat Feb 25 17:27:27 2006] [19130:59744] [debug]
ajp_send_request::jk_ajp_common.c (1261): request body
to send 0 - request body to resend 0
#####################################
That's it, it's stuck.
If the client does the POST again, the GET redirect
will go through the second time.
Everything then works for a while, until the client is
idle again.
We would really appreciate any suggestions or advice.
The web server is running 64bit Apache 2.0.55, Redhat
Enterprise Linux v4 WS and mod_jk 1.2.15.
Tomcat is 5.5.15
Here's my JK settings:
---------------
JkWorkersFile
"/usr/local/apache2/conf/workers.properties"
JkRequestLogFormat "%w %V %T %m %U%q"
JkLogFile "/usr/local/apache2/logs/access/mod_jk.log"
JkLogLevel debug
JkMount /*.jsp app01
JkMount /servlet/* app01
JkMount /services/* app01
JkShmFile jk.shm
Here's my worker settings:
---------------
worker.list=app01
worker.app01.type=ajp13
worker.app01.host=10.0.0.9
worker.app01.port=8009
Thanks,
-Michael
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