https://bz.apache.org/bugzilla/show_bug.cgi?id=63859
Bug ID: 63859
Summary: AJP cping/cpong mode failing on Tomcat 9.x
Product: Tomcat 9
Version: 9.0.26
Hardware: PC
Status: NEW
Severity: regression
Priority: P2
Component: Connectors
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
Hello,
We have a common infratructure for all our Tomcat instances (7,8&9) based on
httpd + mod_jk / ajp.
We implemented a while ago cping/pong om httpd with mode A, and it works
perfectly with Tomcat 7&8.
[info] ajp_handle_cping_cpong::jk_ajp_common.c (976): (tomcat9) timeout in
reply cpong after 10000 ms. Socket = 31 (event=110)
[info] ajp_maintain::jk_ajp_common.c (3464): (tomcat9) failed sending request,
socket -1 keepalive cping/cpong failure (errno=110)
Leading progressively to
[info] ajp_service::jk_ajp_common.c (2775): (tomcat9) sending request to tomcat
failed (recoverable), because of error during request sending (attempt=2)
[error] ajp_service::jk_ajp_common.c (2796): (tomcat9) connecting to tomcat
failed (rc=-3, errors=1, client_errors=0).
[info] service::jk_lb_worker.c (1601): service failed, worker tomcat9 is in
error state
We use the latest mod_jk (mod_jk/1.2.46)
I tried using Tomcat native protocol (which we never used so far), same error.
I tried to look into tomcat 9 logs, nothing shows, and Tomcat is still up and
running (Inspecction via JMX shows everything ok, Probe console and manager
console shows no limit...).
I even tried to run a massload using Jmeter on AJP port while the error was
showing in httpd logs : no error, all the GET ends in success. But httpd still
sees a cping/cpong error.
In the end I may have fixed the issue by changing the mod_jk parameter and
disabling the "cping cpong" mode :
worker.tomcat9.ping_mode=C
instead of previously worker.tomcat9.ping_mode=A
(which does the cping/cpong on a regular basis)
=> Since I changed this I don't have any errors in httpd.
So I suspect a regression in Tomcat 9 somewhere with AJP protocol, even though
I couldn't find any error in Tomcat logs ...
Not sure if I can help more, just wanted to highlight this issue but if you
need more detail or debug log don't hesitate.
The settings of my connectors (7 8 & 9 ) are the same :
<Connector port="xxxx" protocol="AJP/1.3" maxThreads="400"
connectionTimeout="600000"/>
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