https://community.appian.com/discussions/f/administration/8989/engines-failed-to-restartHi .. We were trying to restart our Appian ( 7.9 ) - clustered environment and engines are not starting properly . Metdata DB for Appian went down over the weekend and while restarting the Appian engines, attached error is being seen. Any pointers areen-USTelligent Community 12https://community.appian.com/thread/40072?ContentTypeID=1Wed, 07 Dec 2016 01:47:50 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:c656d102-72cd-41a7-ae96-6a2299d7e777abhinavg712Thanks Sushil, changing server.conf.processcommon.MAX_EXEC_ENGINE_LOAD_METRIC to higher value resolved the issue.<div style="clear:both;"></div>https://community.appian.com/thread/39993?ContentTypeID=1Tue, 06 Dec 2016 02:32:21 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:ea5eae8a-03a4-4edd-9322-6810a0a24dc1sushilk17Hello @abhinavg712<br /><br />Please go through below documentation to understand the issue and its solution..<br /><br /><a href="https://forum.appian.com/suite/help/7.11/Configuring_the_Process_Engine_Servers.html#MAX_EXEC_ENGINE_LOAD_METRIC">forum.appian.com/.../Configuring_the_Process_Engine_Servers.html</a><br /><br /><a href="https://forum.appian.com/suite/help/7.11/kb/kb-1088.html">forum.appian.com/.../kb-1088.html</a><br /><br /><br /> 1. Update custom.properties in the APP_SERVER increase ht limit. Please refer above documentation,<br />2. Restart app server<br />3. Verify if the error is gone<br />4. Delete process instances<div style="clear:both;"></div>