Unable to connect to the node: Connection Failed Debug Data: 5 could not send the HTTP request: Could not execute the request: connect() timed out!

Symptoms 

• While opening the slave node's page in SolusVM, process is waiting for 30 seconds, then the following error occurs:

  SVM_ERROR: Connection Failed
  Debug Data: 5 could not send the HTTP request: Could not execute the request: connect() timed out!

• Curl from master to slave and vice versa is showing connection timed out as well:

  # curl -v -k https://203.0.113.2:5656/api/admin/command.php
  * About to connect() to 203.0.113.2 port 5656 (#0)
  * Trying 157.97.133.2... Connection timed out
  * couldn't connect to host
  * Closing connection #0
  curl: (7) couldn't connect to host
  # curl -v -k https://203.0.113.3:6767/command.php
  * About to connect() to 203.0.113.2 port 6767 (#0)
  * Trying 157.97.133.2... Connection timed out
  * couldn't connect to host
  * Closing connection #0
  curl: (7) couldn't connect to host

Cause

Network or firewall issue between the servers.

Resolution

Note: The article is applicable for the cases with ERROR: 5 code error only. If the code error is different, search for the solution in this hub article

1. Connect to the slave node via SSH
2. Restart SolusVM service:

   # service svmstack-nginx restart
   # service svmstack-fpm restart

Otherwise, contact network administrator and resolve the firewall or network issues between the servers.