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comparison memcached_keepalive_stale.t @ 250:0c9f15938545

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Tests: upstream keepalive tests imported.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 24 Jan 2013 02:00:03 +0400
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children 6cbcfb4ef7ee
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249:6a0d934950bc 250:0c9f15938545
1 #!/usr/bin/perl
2
3 # (C) Maxim Dounin
4
5 # Test for stale events handling in upstream keepalive.
6
7 ###############################################################################
8
9 use warnings;
10 use strict;
11
12 use Test::More;
13
14 BEGIN { use FindBin; chdir($FindBin::Bin); }
15
16 use lib 'lib';
17 use Test::Nginx;
18
19 ###############################################################################
20
21 select STDERR; $| = 1;
22 select STDOUT; $| = 1;
23
24 eval { require Cache::Memcached; };
25 plan(skip_all => 'Cache::Memcached not installed') if $@;
26
27 my $t = Test::Nginx->new()->has('rewrite')->has_daemon('memcached')->plan(2)
28 ->write_file_expand('nginx.conf', <<'EOF');
29
30 %%TEST_GLOBALS%%
31
32 daemon off;
33
34 worker_processes 2;
35
36 events {
37 }
38
39 http {
40 %%TEST_GLOBALS_HTTP%%
41
42 upstream memd {
43 server 127.0.0.1:8081;
44 keepalive 1;
45 }
46
47 server {
48 listen 127.0.0.1:8080 sndbuf=32k;
49 server_name localhost;
50
51 location / {
52 set $memcached_key $uri;
53 memcached_pass memd;
54 }
55 }
56 }
57
58 EOF
59
60 my $memhelp = `memcached -h`;
61 my @memopts1 = ();
62
63 if ($memhelp =~ /repcached/) {
64 # repcached patches adds additional listen socket memcached
65 # that should be different too
66
67 push @memopts1, '-X', '8091';
68 }
69 if ($memhelp =~ /-U/) {
70 # UDP ports no longer off by default in memcached 1.2.7+
71
72 push @memopts1, '-U', '0';
73 }
74
75 $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8081', @memopts1);
76
77 $t->run();
78
79 $t->waitforsocket('127.0.0.1:8081')
80 or die "Unable to start memcached";
81
82 ###############################################################################
83
84 my $memd1 = Cache::Memcached->new(servers => [ '127.0.0.1:8081' ]);
85
86 # It's possible that stale events occur, i.e. read event handler called
87 # for just saved upstream connection without any data available for
88 # read. We shouldn't close upstream connection in such situation.
89 #
90 # This happens due to reading from upstream connection on downstream write
91 # events. More likely to happen with multiple workers due to use of posted
92 # events.
93 #
94 # Stale event may only happen if reading response from upstream requires
95 # entering event loop, i.e. response should be big enough. On the other
96 # hand, it is less likely to occur with full client's connection output
97 # buffer.
98 #
99 # We use here 2 workers, 20k response and set output buffer on clients
100 # connection to 32k. This allows more or less reliably reproduce stale
101 # events at least on FreeBSD testbed here.
102
103 $memd1->set('/big', 'X' x 20480);
104
105 my $total = $memd1->stats()->{total}->{total_connections};
106
107 for (1 .. 100) {
108 http_get('/big');
109 }
110
111 cmp_ok($memd1->stats()->{total}->{total_connections}, '<=', $total + 2,
112 'only one connection per worker used');
113
114 $t->stop();
115
116 like(`grep -F '[alert]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no alerts');
117
118 ###############################################################################