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