haproxy/reg-tests/cache/sample_fetches.vtc
Willy Tarreau e1465c1e46 REGTESTS: disable inter-thread idle connection sharing on sensitive tests
Some regtests involve multiple requests from multiple clients, which can
be dispatched as multiple requests to a server. It turns out that the
idle connection sharing works so well that very quickly few connections
are used, and regularly some of the remaining idle server connections
time out at the moment they were going to be reused, causing those random
"HTTP header incomplete" traces in the logs that make them fail often. In
the end this is only an artefact of the test environment.

And indeed, some tests like normalize-uri which perform a lot of reuse
fail very often, about 20-30% of the times in the CI, and 100% of the
time in local when running 1000 tests in a row. Others like ubase64,
sample_fetches or vary_* fail less often but still a lot in tests.

This patch addresses this by adding "tune.idle-pool.shared off" to all
tests which have at least twice as many requests as clients. It proves
very effective as no single error happens on normalize-uri anymore after
10000 tests. Also 100 full runs of all tests yield no error anymore.

One test is tricky, http_abortonclose, it used to fail ~10 times per
1000 runs and with this workaround still fails once every 1000 runs.
But the test is complex and there's a warning in it mentioning a
possible issue when run in parallel due to a port reuse.
2021-05-09 14:41:41 +02:00

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varnishtest "Basic cache test"
#REQUIRE_VERSION=1.9
feature ignore_unknown_macro
server s1 {
rxreq
txresp -nolen -hdr "Transfer-Encoding: chunked" \
-hdr "Cache-Control: max-age=5"
chunkedlen 15
chunkedlen 15
chunkedlen 15
chunkedlen 0
} -start
server s2 {
rxreq
txresp -nolen -hdr "Transfer-Encoding: chunked" \
-hdr "Cache-Control: max-age=5"
chunkedlen 16
chunkedlen 16
chunkedlen 16
chunkedlen 0
} -start
server s3 {
rxreq
txresp -nolen -hdr "Transfer-Encoding: chunked" \
-hdr "Cache-Control: max-age=5"
chunkedlen 17
chunkedlen 17
chunkedlen 17
chunkedlen 0
rxreq
txresp -nolen -hdr "Transfer-Encoding: chunked" \
-hdr "Cache-Control: max-age=5"
chunkedlen 17
chunkedlen 17
chunkedlen 17
chunkedlen 0
} -start
haproxy h1 -conf {
global
# WT: limit false-positives causing "HTTP header incomplete" due to
# idle server connections being randomly used and randomly expiring
# under us.
tune.idle-pool.shared off
defaults
mode http
${no-htx} option http-use-htx
timeout connect 1s
timeout client 1s
timeout server 1s
frontend fe
bind "fd@${fe}"
use_backend first_be if { path_beg /first }
use_backend nocache_be if { path_beg /nocache }
default_backend second_be
backend first_be
http-request cache-use first_cache
server www ${s1_addr}:${s1_port}
http-response cache-store first_cache
http-response set-header X-Cache-Hit %[res.cache_hit]
http-response set-header X-Cache-Name %[res.cache_name]
backend second_be
http-request cache-use second_cache
server www ${s2_addr}:${s2_port}
http-response cache-store second_cache
http-response set-header X-Cache-Hit %[res.cache_hit]
http-response set-header X-Cache-Name %[res.cache_name]
backend nocache_be
server www ${s3_addr}:${s3_port}
http-response set-header X-Cache-Hit %[res.cache_hit]
http-response set-header X-Cache-Name %[res.cache_name]
cache first_cache
total-max-size 3
max-age 40
max-object-size 3000
cache second_cache
total-max-size 3
max-age 20
max-object-size 3072
} -start
client c1 -connect ${h1_fe_sock} {
txreq -url "/first"
rxresp
expect resp.status == 200
expect resp.bodylen == 45
expect resp.http.X-Cache-Hit == 0
expect resp.http.X-Cache-Name == ""
txreq -url "/second"
rxresp
expect resp.status == 200
expect resp.bodylen == 48
expect resp.http.X-Cache-Hit == 0
expect resp.http.X-Cache-Name == ""
txreq -url "/nocache"
rxresp
expect resp.status == 200
expect resp.bodylen == 51
expect resp.http.X-Cache-Hit == 0
expect resp.http.X-Cache-Name == ""
# Response should come form the cache now
txreq -url "/nocache"
rxresp
expect resp.status == 200
expect resp.bodylen == 51
expect resp.http.X-Cache-Hit == 0
expect resp.http.X-Cache-Name == ""
txreq -url "/first"
rxresp
expect resp.status == 200
expect resp.bodylen == 45
expect resp.http.X-Cache-Hit == 1
expect resp.http.X-Cache-Name == "first_cache"
txreq -url "/second"
rxresp
expect resp.status == 200
expect resp.bodylen == 48
expect resp.http.X-Cache-Hit == 1
expect resp.http.X-Cache-Name == "second_cache"
} -run