emerg logger: Re-starting restnoded"

As you can see here https://support.f5.com/csp/article/K45092482, "restnoded" is the daemon to handles iControl REST queries.

Check logfile to see if more info is included in "/var/log/restnoded.[0-9]*.log" or "/var/log/restnoded/restnoded.log"

This should only affects to REST queries handling. Are you dealing with iWorkflow in your solution?

Here you can fine a similar problem with solution: https://devcentral.f5.com/wiki/iWorkflow.HowToSamples_iworkflow_js_samples.ashx

Hope this help.