Users will see the following error in Appian:
Error Evaluating UI Expression
Expression evaluation error : [valid:false,syntaxError:false,value:Expression evaluation error: An error occurred while executing a save: org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: ]
Along with the above error, users will see the following error in the application server log:
INFO [stdout] (http-/0.0.0.0:8080-5) 2015-06-10 11:26:42,836 [http-/0.0.0.0:8080-5] WARN com.appiancorp.security.auth.activity.UserActivityFilter - Could not record user activity: secCtx=rajivr, authDetails=AuthenticationDetails[ts=2015-06-10 11:19:47.704, entryPoint=PORTAL, clientIpAddress=172.18.0.220, clientUserAgent=Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)] -- org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: 
This results in interruptions in the following functionality:
This is caused by an issue with the search server, specifically one or more of the following:
To correct this behavior, perform the following:
If the issue still hasn't been resolved, verify the following:
This article applies to Appian 7.8 and later.
Last Reviewed: April 2017
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