Mailing List Archive

#1755: The (struct backend).n_conn counter is never decremented
----------------------+-------------------
Reporter: Dridi | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: varnishd | Version: trunk
Severity: blocker | Keywords:
----------------------+-------------------
You'll eventually reach the maximum number of connections for a given
backend and never be able to reach this backend again.

More on the mailing list:
- https://www.varnish-cache.org/lists/pipermail/varnish-
dev/2015-June/008379.html
- https://www.varnish-cache.org/lists/pipermail/varnish-
dev/2015-June/008380.html

Test case:

{{{
varnishtest "The (struct backend).n_conn counter is never decremented"

server s1 {
rxreq
txresp

rxreq
txresp
} -start

varnish v1 -vcl {
backend s1 {
.host = "${s1_addr}";
.port = "${s1_port}";
.max_connections = 1;
}
} -start

client c1 {
txreq -url "/foo"
rxresp
expect resp.status == 200

txreq -url "/bar"
rxresp
expect resp.status == 200
} -run

varnish v1 -expect backend_busy == 0
}}}

--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1755>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

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