Hi,
my environment is:
OS SuSE SLES11/SP2 64-bit
HTTP frontend: Apache2-2.2.21 (64-bit)
mod_jk: 1.2.37
Problem short: excessive connection timeouts with weird socket ids
Problem long: we frontend 4 Tomcats (7.0.42) using Apache2(2.2.21) and
mod_jk(1.2.37). We are seeing a heavy amount of connection timeouts when
the tomcats are loaded. Surprisingly the logs show socket id "-1", which
should not happen in my opinion, because most actions are guarded by the
IS_VALID_SOCKET macro. Here is one example. The code emmitting the line
should not be reached due to the check in line 1543:
[Mon Jun 16 17:12:05.405 2014] [7233:140275337774848] [info]
ajp_send_request::jk_ajp_common.c (1562): (lpsdm83-1) failed sending
request, socket -1 prepost cping/cpong failure (errno=110)
1543: while (IS_VALID_SOCKET(ae->sd)) {
int err = JK_FALSE;
if (jk_is_socket_connected(ae->sd, l) == JK_FALSE) {
ae->last_errno = errno;
jk_log(l, JK_LOG_DEBUG,
"(%s) failed sending request, "
"socket %d is not connected any more (errno=%d)",
ae->worker->name, ae->sd, ae->last_errno);
ajp_abort_endpoint(ae, JK_FALSE, l);
err = JK_TRUE;
err_conn++;
}
if (ae->worker->prepost_timeout > 0 && !err) {
/* handle cping/cpong if prepost_timeout is set
* If the socket is disconnected no need to handle
* the cping/cpong
*/
if (ajp_handle_cping_cpong(ae,
ae->worker->prepost_timeout, l) == JK_FALSE) {
1562: jk_log(l, JK_LOG_INFO,
"(%s) failed sending request, "
"socket %d prepost cping/cpong failure (errno=%d)",
ae->worker->name, ae->sd, ae->last_errno);
/* XXX: Is there any reason to try other
* connections to the node if one of them fails
* the cping/cpong heartbeat?
* Tomcat can be either too busy or simply dead, so
* there is a chance that all other connections would
* fail as well.
*/
err = JK_TRUE;
err_cping++;
}
}
So, before trying to tell me that I am missing workers.properties and
complete logs, I want to check first whether the "-1" socket ids are to be
expected here or whether there is some kind of bug involved.
Thanks in advance
Martin
--
------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www: http://www.knobisoft.de
