NDB Cluster Log Messages Log Message Description Event Name Event Type Priority Severity in the selection process. Arbitration check lost - less than 1/2 nodes left  or Arbitration check won - all node groups and more than 1/2 nodes left  or Arbitration check won - node group majority  or Arbitration check lost - missing node group or  Network partitioning - arbitration required  or Arbitration won - positive reply from node node_id  or Arbitration lost - negative reply from node  node_id or  Network partitioning - no arbitrator available or  Network partitioning - no arbitrator configured  or Arbitration failure - error_message [state= state_code ] This message reports on the result of arbitration. In the event of arbitration failure, an error_message and an arbitration state_code are provided; definitions for both of these are found in include/ kernel/ signaldata/ ArbitSignalData.hpp . ArbitResult NodeRestart 2 ALERT 4453