Web 应用程序在运行密集任务时关闭 - Openshift

Question

我有一个与此相关的问题：Web app shuts down (502 error) while running a intensive task。 这是代码

您可以通过以下方式直接跟踪此应用程序： ssh -t 577d56787628e1406200010c@mainserver-bizcentral.rhcloud.com '尾 /log/*' /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/ruby_compat.rb:25:in select': closed stream (IOError) from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/ruby_compat.rb:25:inio_select' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/transport/packet_stream.rb:75:in available_for_read?' from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/transport/packet_stream.rb:87:innext_packet' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/transport/session.rb:193:in block in poll_message' from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/transport/session.rb:188:inloop' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/transport/session.rb:188:in poll_message' from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:474:indispatch_incoming_packets' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:225:in preprocess' from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:206:inprocess' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:170:in block in loop' from /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:170:inloop' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh/connection/session.rb:170:in loop' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/ssh_helpers.rb:198:inblock in ssh_ruby' 来自 /var/lib/gems/2.3.0/gems/net-ssh-3.2.0/lib/net/ssh.rb:240:in start' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/ssh_helpers.rb:173:inssh_ruby' 来自 /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/commands/tail.rb:40:in tail' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/commands/tail.rb:21:inrun' 来自 /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/commands.rb:294:in execute' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/commands.rb:285:inblock (3 个级别) in to_commander' 来自 /var/lib/gems/2.3.0/gems/commander-4.2.1/lib/commander/command.rb:180:in call' from /var/lib/gems/2.3.0/gems/commander-4.2.1/lib/commander/command.rb:155:inrun' 来自 /var/lib/gems/2.3.0/gems/commander-4.2.1/lib/commander/runner.rb:421:in run_active_command' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/command_runner.rb:72:inrun！' 来自 /var/lib/gems/2.3.0/gems/commander-4.2.1/lib/commander/delegates.rb:8:in run!' from /var/lib/gems/2.3.0/gems/rhc-1.38.7/lib/rhc/cli.rb:37:instart' 来自 /var/lib/gems/2.3.0/gems/rhc-1.38.7/bin/rhc:20:in <top (required)>' from /usr/local/bin/rhc:23:inload' 从 /usr/local/bin/rhc:23:in `' edwin@edwin-Lenovo-FLEX-3-1130:~$

对此的正确解决方法是什么。如果我在青铜下获得 small.highcpu 升级或 medium cpu，如果确实与内存有关，还会出现此问题吗？

Answer 1

502 是网关问题。您的一台服务器的响应未到达另一台服务器。这也发生在我身上。

我的项目是在 Apache 和 Mysql(5.5) 上。发现 mysql 服务器才是真正的问题，因为我的进程列表很大，而且由于表锁定和其他问题，很少有进程被卡住。

通过指定适当的存储引擎（如 InnoDb）优化我的数据库，并将 mysql 更新为 mariadb。

通过实现一些缓存（如 memchache）解决了这个问题，这减少了我的数据库服务器上的负载并且响应速度很快。

尝试重新启动服务器。

您还可以检查两台服务器的超时，以防出现 504 错误。