ec2 instance always timeout in about 60 seconds?

Question

Why my ec2 instance always timeout in about 60 seconds when I access http or https? After about 60 seconds always return:

Network Error (tcp_error)

A communication error occurred: "Operation timed out" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.

and some times return:

Gateway Timeout

The gateway did not receive a timely response from the update server or application.

I use apache web server and PHP with max timeout. I dont use ELB/Load Balancer in my EC2, and I never create any ELB. I tried to find solution in internet but always found ELB setting.

score 2 · Answer 1 · answered Jun 28 '19 at 09:00

2

In your apache/vhost config you need to set the Timeout directive to the desired timeout value.

https://httpd.apache.org/docs/2.4/mod/core.html#timeout

Description: Amount of time the server will wait for certain events before failing a request
Syntax: TimeOut seconds
Default: TimeOut 60
Context: server config, virtual host

answered Jun 28 '19 at 09:00

Jason Floyd

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I already set it, the error came from TCP not apache. – Muhammad Dyas Yaskur Jun 28 '19 at 09:26

score 2 · Accepted Answer · answered Jun 28 '19 at 09:32

According this article I just need to run the command below

/sbin/sysctl -w net.ipv4.tcp_keepalive_time=200 net.ipv4.tcp_keepalive_intvl=200 net.ipv4.tcp_keepalive_probes=5

I tried and not working, but after I edited /etc/sysctl.conf and add following code:

net.ipv4.tcp_keepalive_time=200
net.ipv4.tcp_keepalive_intvl=200
net.ipv4.tcp_keepalive_probes=5

Then I rebooted my instance, and now the timeout is longer.

ec2 instance always timeout in about 60 seconds?

2 Answers2