nl_tokens: Represents a client - side error indicating that all connections to a certain host have reached the maximum amount of in - flight requests supported .
pl_tokens: function BusyConnectionError ( address , maxRequestsPerConnection , connectionLength ) { const message = util . format ( 'All connections to host %s are busy, %d requests are in-flight on %s' , address , maxRequestsPerConnection , connectionLength === 1 ? 'a single connection' : 'each connection' ) ; DriverError . <mask> ( this , message , this . constructor ) ; this . info = 'Represents a client-side error indicating that all connections to a certain host have reached ' + 'the maximum amount of in-flight requests supported (pooling.maxRequestsPerConnection)' ; }