All,
We have apache running on Windows Web Server 2008 R2, fronting tomcat. We
use mod_jk to connect. We see these kind of log messages in mod_jk logs.
What do they mean?
[Thu Jul 28 12:30:56 2011] [14264:10144] [info] jk_ajp_common.c (1882):
Writing to client aborted or client network problems
[Thu Jul 28 12:30:56 2011] [14264:10144] [info] jk_ajp_common.c (2540):
(workerXtsRbge) sending request to tomcat failed (unrecoverable), because of
client write error (attempt=1)
- Specifically what is the client here? The browser that called apache,
or mod_jk as a client of tomcat?
- What do the numbers in brackets mean [14264:10144] - bytes and time?
- Does this mean that the browser was sent a http 500?
- Is there a way that I can get the uniqueId logged along with these
lines to make correlating the access and mod_)jk log easier?
- I think I read somewhere that by default mod_jk will try a tomcat call
once, and if that fails try again before giving up. Does the "attempt=1"
mean this is the result of the first attempt or is it the result of the
second (e.g. 0 based)? I assume that in the absence of a attempt=0 this must
mean that the first attempt failed, and therefore assume that the second
succeeded. Is this a fair assumption?
Under jkstatus I see Err and CE. From the legend Err means "Number of failed
requests" and CE is "Number of client errors".
Apache 2.2.17 - httpd.conf
LoadModule jk_module modules/mod_jk.so
JkWorkersFile d:/apps/Apache2.2/conf/workers.properties
JkShmFile d:/apps/Apache2.2/temp/mod_jk.shm
JkLogFile "|d:/apps/Apache2.2/bin/cronolog.exe
logs/mod_jk.%Y%m%d.log"
JkLogLevel info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkExtractSSL On
JkHTTPSIndicator HTTPS
JkSESSIONIndicator SSL_SESSION_ID
JkCIPHERIndicator SSL_CIPHER
JkCERTSIndicator SSL_CLIENT_CERT
JkEnvVar UNIQUE_ID unknown
JkEnvVar SSL_CLIENT_V_START
Then within a virtual host element
JkMount /* workerXtsRbge
JkUnMount /index.html workerXtsRbge
JkUnMount /ie6unsupported.html workerXtsRbge
mod_jk v1.2.30 - worker.properties
worker.list=mystatus, workerXtsRbge
worker.template.type=ajp13
worker.template.host=localhost
worker.template.ping_timeout=1000
worker.template.ping_mode=A
worker.workerXtsRbge.reference=worker.template
worker.workerXtsRbge.port=8010
Tomcat v7.0.12 - server.xml
<Connector port="8010" protocol="AJP/1.3" redirectPort="8443"
enableLookups="false" />
Thanks
Chris
