https://issues.apache.org/bugzilla/show_bug.cgi?id=56703
Bug ID: 56703
Summary: "Current number of backend connections" counter ever
increasing when timeouts are defined
Product: Tomcat Connectors
Version: 1.2.40
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_jk
Assignee: [email protected]
Reporter: [email protected]
Hi,
our environment is (I know, some are old ...):
Apache 2.2.21
mod_jk-1.2.40
Tomcat 7.0.42
We have found that the numbers for "Con", the current number of backend
connections" is growing steadily, well over any sensible number.
The following configuration seems to trigger the behavior:
worker.template.type=ajp13
worker.template.lbfactor=1
worker.template.prepost_timeout=15000
worker.template.connect_timeout=15000
worker.template.ping_timeout=15000
worker.template.ping_mode=A
worker.template.connection_ping_interval=180
worker.template.retries=3
worker.template.connection_pool_timeout=30
Without setting the timeout values, the displayed number of backend connections
looks to be stable.
The behavior seems to have started between mod_jk-1.2.32 and mod_jk-1.2.37.
Looking at the code, I can see some heavy redo of the handling of the
"connected" counter. I suspect a "connected--" is missing, but hard to say
where.
Cheers
Martin
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