Setting enableLookups to true on Connector will result in a DNS look-ups to obtain the host name of the remote client before logging any information. This uses additional resources when logging. Rationale: Allowing enableLookups adds additional overhead to resolve the host name of a remote client which is rarely needed.
Solution
In Connector elements, set the enableLookups attribute to false or remove it. <Connector ... enableLookups='false' /> Default Value: By default, DNS lookups are disabled.