If event SECJ0118E is in a JVMs SystemOut.log or HPEL log, this means that there was a failed attempt to sign into the WebSphere web console.
SECJ0118E: Authentication error during authentication for username
For example, in this example, the authentication failed when attempting to sign in as Bugs.
The most common cause of this issue that the user simply mistyped their username or password. However, if there are numerous SECJ0118E events in the SystemOut.log, this may be suggestive of a bigger problem. For example, a users password may have been changed, without their knowledge. Or, there may be some issue with LDAP. When there are numerous SECJ0118E events, more analysis is required.