localhost:4848 — GlassFish Admin

Port 4848 is the default admin console for GlassFish Server (now Eclipse GlassFish), the reference implementation for Jakarta EE (formerly Java EE). Manage applications, configure resources, and monitor your Java enterprise server.

GlassFish Admin Console: http://localhost:4848
Default: admin / (no password) | Apps run on :8080

Default Credentials

UsernamePassword
admin(blank - no password)
Security: Set an admin password after first login: asadmin change-admin-password

GlassFish Ports

PortPurpose
4848Admin Console (HTTPS)
8080HTTP (applications)
8181HTTPS (applications)
4900IIOP (CORBA)

Start GlassFish

# Start domain
asadmin start-domain

# Start with specific domain
asadmin start-domain domain1

# Stop domain
asadmin stop-domain

# Check status
asadmin list-domains

Admin Console Features

  • Applications — Deploy/undeploy WAR, EAR, JAR
  • Resources — JDBC pools, JMS, JavaMail
  • Configurations — JVM options, logging
  • Monitoring — Server stats, request metrics
  • Security — Realms, certificates, users

Deploy Application

# Command line
asadmin deploy /path/to/myapp.war

# With context root
asadmin deploy --contextroot /myapp myapp.war

# Undeploy
asadmin undeploy myapp

Troubleshooting

ProblemSolution
Can't access 4848Start domain: asadmin start-domain
Port conflictChange in domain.xml or use --adminport
Forgot passwordasadmin change-admin-password