Request timed out error when loading K2 Management

Problem

K2 server is experiencing slowness and the K2 Management site is unable to load with the following error shown:

Request Timed out(http 500 error)

A K2 service restart temporarily resolves the issue, but after some time it occurs again.

Solution

Below workaround resolved the issue:

1. Edit the SmartForms runtime web.config that can be found in {K2 Install Path}\K2 smartforms Runtime

2. Locate the following line:

httpRuntime maxRequestLength='16384' requestValidationMode='2.0' enableVersionHeader='false' sendCacheControlHeader='false' executionTimeout='320'

3. Increase the executionTimeout to a higher value e.g. 600. The value is in seconds.

4. Save the config file.

5. Restart the K2 service and do an iisreset

You can refer to the following documentation for more details on the executionTimeout setting: https://help.nintex.com/en-US/k2five/icg/5.6/Content/ConfigRef/config-General.html