Newrelic PHP APM插件的问题 - 崩溃，僵尸，PHP-FPM和Nginx

Question

I've been attempting to install the PHP APM plugin for my Web servers, however I've hit a wall and require some assistance.

We are able to install the plugin within issue, update the config without issue, and start the service without issue. However, shortly afterwards the php_agent.log starts showing that it cannot connect to the daemon and continues to fail.

I've checked the daemon and it shows that it is running, however I discovered that the process has actually zombie'd out and is dead. Restarting PHP-FPM removes the zombie and the service works again for a few minutes, but goes back into a zombie state soon after.

I'm able to replicate this problem across all of my web servers. I even spun up a brand new box and deployed it, adding the same configurations as the others, and it too started to zombie shortly after starting.

My configuration is as follows:

• CentOS 7 (kernel 3.10.0-229.11.1.el7.x86_64)
• PHP-FPM (5.5.30-1.el7.remi)
• Nginx (1:1.6.3-6.el7)
• Newrelic Daemon (4.23.4.113-1)
• Newrelic PHP5 (4.23.4.113-1)
• Newrelic PHP5 Common (4.23.4.113-1)

To add insult to injury, it appears that if we leave the zombie for too long, it eventually crashes the Web site across all the servers. Truely, a pain in the rear.

I would appreciate any help or thoughts anyone might have, as this is driving me insane.

Thanks!

Answer 1

Do you have a process that is clearing out files residing in /tmp for more than some set time? The agent and daemon communicate via a socket file called /tmp/.newrelic.sock. If it goes away you should see "ENOENT" errors in the logs. You might also have a permission issue for some locations/files.

If the socket file is the problem, consider switching to a TCP port instead of the socket file by setting newrelic.daemon.port in your configuration file (newrelic.ini)