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|
# frozen_string_literal: true
require_relative '../helper'
describe 'failover' do
MemcachedManager.supported_protocols.each do |p|
describe "using the #{p} protocol" do
# Timeouts on JRuby work differently and aren't firing, meaning we're
# not testing the condition
unless defined? JRUBY_VERSION
describe 'timeouts' do
it 'not lead to corrupt sockets' do
memcached_persistent(p) do |dc|
value = { test: '123' }
begin
Timeout.timeout 0.01 do
start_time = Time.now
10_000.times do
dc.set('test_123', value)
end
flunk("Did not timeout in #{Time.now - start_time}")
end
rescue Timeout::Error
# Ignore expected timeout
end
assert_equal(value, dc.get('test_123'))
end
end
end
end
describe 'assuming some bad servers' do
it 'silently reconnect if server hiccups' do
server_port = 30_124
memcached_persistent(p, server_port) do |dc, port|
dc.set 'foo', 'bar'
foo = dc.get 'foo'
assert_equal('bar', foo)
memcached_kill(port)
memcached_persistent(p, port) do
foo = dc.get 'foo'
assert_nil foo
memcached_kill(port)
end
end
end
it 'reconnects if server idles the connection' do
port1 = 32_112
port2 = 37_887
memcached(p, port1, '-o idle_timeout=1') do |_, first_port|
memcached(p, port2, '-o idle_timeout=1') do |_, second_port|
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
dc.set 'foo', 'bar'
dc.set 'foo2', 'bar2'
foo = dc.get_multi 'foo', 'foo2'
assert_equal({ 'foo' => 'bar', 'foo2' => 'bar2' }, foo)
# wait for socket to expire and get cleaned up
sleep 5
foo = dc.get_multi 'foo', 'foo2'
assert_equal({ 'foo' => 'bar', 'foo2' => 'bar2' }, foo)
end
end
end
it 'handle graceful failover' do
port1 = 31_777
port2 = 32_113
memcached_persistent(p, port1) do |_first_dc, first_port|
memcached_persistent(p, port2) do |_second_dc, second_port|
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
dc.set 'foo', 'bar'
foo = dc.get 'foo'
assert_equal('bar', foo)
memcached_kill(first_port)
dc.set 'foo', 'bar'
foo = dc.get 'foo'
assert_equal('bar', foo)
memcached_kill(second_port)
assert_raises Dalli::RingError, message: 'No server available' do
dc.set 'foo', 'bar'
end
end
end
end
it 'handle them gracefully in get_multi' do
port1 = 32_971
port2 = 34_312
memcached_persistent(p, port1) do |_first_dc, first_port|
memcached(p, port2) do |_second_dc, second_port|
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
dc.set 'a', 'a1'
result = dc.get_multi ['a']
assert_equal({ 'a' => 'a1' }, result)
memcached_kill(first_port)
result = dc.get_multi ['a']
assert_equal({ 'a' => 'a1' }, result)
end
end
end
it 'handle graceful failover in get_multi' do
port1 = 34_541
port2 = 33_044
memcached_persistent(p, port1) do |_first_dc, first_port|
memcached_persistent(p, port2) do |_second_dc, second_port|
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
dc.set 'foo', 'foo1'
dc.set 'bar', 'bar1'
result = dc.get_multi %w[foo bar]
assert_equal({ 'foo' => 'foo1', 'bar' => 'bar1' }, result)
memcached_kill(first_port)
dc.set 'foo', 'foo1'
dc.set 'bar', 'bar1'
result = dc.get_multi %w[foo bar]
assert_equal({ 'foo' => 'foo1', 'bar' => 'bar1' }, result)
memcached_kill(second_port)
result = dc.get_multi %w[foo bar]
assert_empty(result)
end
end
end
it 'stats it still properly report' do
port1 = 34_547
port2 = 33_219
memcached_persistent(p, port1) do |_first_dc, first_port|
memcached_persistent(p, port2) do |_second_dc, second_port|
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
result = dc.stats
assert_instance_of Hash, result["localhost:#{first_port}"]
assert_instance_of Hash, result["localhost:#{second_port}"]
memcached_kill(first_port)
dc = Dalli::Client.new ["localhost:#{first_port}", "localhost:#{second_port}"]
result = dc.stats
assert_instance_of NilClass, result["localhost:#{first_port}"]
assert_instance_of Hash, result["localhost:#{second_port}"]
memcached_kill(second_port)
end
end
end
end
end
end
end
|
