[英]Ruby headless watir-webdriver Xvfb zombies
I have two apps running on a single server that perform headless browsing tasks. 我在一台服务器上运行了两个应用程序来执行无头浏览任务。 Each time one browses, the Xvfb process is not dying and instead becomes a zombie.
每次浏览时,Xvfb进程都不会死亡,而是成为一个僵尸。 I can confirm this with the following script.
我可以使用以下脚本确认这一点。
require 'headless'
require 'watir-webdriver'
require 'yaml'
zombies_at_start = `ps axo pid=,stat= | awk '$2~/^Z/ { print $1 }'`.split("\n").count
5.times do
begin
d = YAML.load_file("/path/to/config/headless.yml")['build_number'] #=> "98"
h = Headless.new(:display => d)
h.start
b = Watir::Browser.new :firefox
b.goto 'http://google.com'
sleep(0.5)
ensure
b.close
h.destroy
end
sleep(0.5)
end
zombies_at_end = `ps axo pid=,stat= | awk '$2~/^Z/ { print $1 }'`.split("\n").count
puts "Created #{zombies_at_end - zombies_at_start} more zombies."
#=> Created 5 more zombies.
Why? 为什么? How can I fix this?
我怎样才能解决这个问题?
Version info: 版本信息:
UPDATE: A pull request submitted to Headless to wait by default was accepted. 更新:提交给Headless默认等待的拉取请求被接受。 Woo!
呜!
The gem headless changed the way it starts, stops (kills) and verifies the Xvfb process . 宝石无头改变了它的启动方式,停止(杀死)并验证了Xvfb进程 。 Though I'm not entirely sure why, but on CentOS 6 this causes the process to zombify.
虽然我不完全确定原因,但在CentOS 6上,这会导致流程僵尸化。 Since the
.destroy
wasn't causing issues previously, it must be related to the way headless starts the Xvfb process (which was re-written simultaneously). 由于
.destroy
以前没有引起问题,它必须与无头启动Xvfb进程(同时重写)的方式有关。
However, the gem simultaneously introduced .destroy_sync
, which waits for the process to die, and does not create zombies. 然而,gem同时引入了
.destroy_sync
,它等待进程死亡,并且不会创建僵尸。
require 'headless'
require 'watir-webdriver'
require 'yaml'
zombies_at_start = `ps axo pid=,stat= | awk '$2~/^Z/ { print $1 }'`.split("\n").count
5.times do
begin
d = YAML.load_file("/path/to/config/headless.yml")['build_number'] #=> "98"
h = Headless.new(:display => d)
h.start
b = Watir::Browser.new :firefox
b.goto 'http://google.com'
sleep(0.5)
ensure
b.close
# h.destroy
h.destroy_sync
end
sleep(0.5)
end
zombies_at_end = `ps axo pid=,stat= | awk '$2~/^Z/ { print $1 }'`.split("\n").count
puts "Created #{zombies_at_end - zombies_at_start} more zombies."
#=> Created 0 more zombies.
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