GlassFish wouldn't start on Red Hat Linux server

Hi all,

I have installed Glassfish by downloading the zip version and unpacking it on my RHE 5 server. However, when I try to start Glassfish, I get the following error message: “There is a process already using the admin port 4848 -- it probably is another instance of a GlassFish server. Command start-domain failed.”
This is not true as no services is currently utilizing the port in question:
Found out by using netstat -tnap | grep \:4848

I have added 127.0.0.1 localhost to my etc/host file (got the idea for this by researching this forum for similar issues) but that hasn’t helped.

The contents of my server.log files are:
-------------------------------server.log-------------------------------------------------------
/usr/glassfish3/glassfish/domains/domain1/logs/server.log

Feb 01, 2012 12:31:48 PM com.sun.enterprise.admin.launcher.GFLauncherLogger info
INFO: JVM invocation command line:
/usr/java/jdk1.7.0_02/bin/java
-cp
/usr/glassfish3/glassfish/modules/glassfish.jar
-XX:+UnlockDiagnosticVMOptions
-XX:MaxPermSize=192m
-XX:NewRatio=2
-Xmx512m
-client
-javaagent:/usr/glassfish3/glassfish/lib/monitor/flashlight-agent.jar
-Dfelix.fileinstall.disableConfigSave=false
-Djavax.net.ssl.keyStore=/usr/glassfish3/glassfish/domains/domain1/config/keystore.jks
-Djava.awt.headless=true
-Dfelix.fileinstall.poll=5000
-Djava.endorsed.dirs=/usr/glassfish3/glassfish/modules/endorsed:/usr/glassfish3/glassfish/lib/endorsed
-Dfelix.fileinstall.bundles.startTransient=true
-Djavax.net.ssl.trustStore=/usr/glassfish3/glassfish/domains/domain1/config/cacerts.jks
-Dcom.sun.enterprise.security.httpsOutboundKeyAlias=s1as
-DANTLR_USE_DIRECT_CLASS_LOADING=true
-Djava.security.auth.login.config=/usr/glassfish3/glassfish/domains/domain1/config/login.conf
-Dgosh.args=--nointeractive
-Dosgi.shell.telnet.maxconn=1
-Djdbc.drivers=org.apache.derby.jdbc.ClientDriver
-Dfelix.fileinstall.dir=/usr/glassfish3/glassfish/modules/autostart/
-Dosgi.shell.telnet.port=6666
-Djava.security.policy=/usr/glassfish3/glassfish/domains/domain1/config/server.policy
-Dfelix.fileinstall.log.level=2
-Dcom.sun.enterprise.config.config_environment_factory_class=com.sun.enterprise.config.serverbeans.AppserverConfigEnvironmentFactory
-Dosgi.shell.telnet.ip=127.0.0.1
-Dcom.sun.aas.instanceRoot=/usr/glassfish3/glassfish/domains/domain1
-Dcom.sun.aas.installRoot=/usr/glassfish3/glassfish
-Djava.ext.dirs=/usr/java/jdk1.7.0_02/lib/ext:/usr/java/jdk1.7.0_02/jre/lib/ext:/usr/glassfish3/glassfish/domains/domain1/lib/ext
-Dfelix.fileinstall.bundles.new.start=true
-Dorg.glassfish.additionalOSGiBundlesToStart=org.apache.felix.shell,org.apache.felix.gogo.runtime,org.apache.felix.gogo.shell,org.apache.felix.gogo.command,org.apache.felix.fileinstall
-Djava.library.path=/usr/glassfish3/glassfish/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
com.sun.enterprise.glassfish.bootstrap.ASMain
-domainname
domain1
-asadmin-args
--host,,,localhost,,,--port,,,4848,,,--secure=false,,,--terse=false,,,--echo=false,,,--interactive=false,,,start-domain,,,--verbose=false,,,--debug=false,,,--domaindir,,,/usr/glassfish3/glassfish/domains,,,domain1
-instancename
server
-verbose
false
-debug
false
-asadmin-classpath
/usr/glassfish3/glassfish/modules/admin-cli.jar
-asadmin-classname
com.sun.enterprise.admin.cli.AsadminMain
-upgrade
false
-type
DAS
-domaindir
/usr/glassfish3/glassfish/domains/domain1
-read-stdin
true
Feb 01, 2012 12:46:46 PM com.sun.enterprise.admin.launcher.GFLauncherLogger info
INFO: JVM invocation command line:
/usr/java/jdk1.7.0_02/bin/java
-cp
/usr/glassfish3/glassfish/modules/glassfish.jar
-XX:+UnlockDiagnosticVMOptions
-XX:MaxPermSize=192m
-XX:NewRatio=2
-Xmx512m
-client
-javaagent:/usr/glassfish3/glassfish/lib/monitor/flashlight-agent.jar
-Dfelix.fileinstall.disableConfigSave=false
-Djavax.net.ssl.keyStore=/usr/glassfish3/glassfish/domains/domain1/config/keystore.jks
-Djava.awt.headless=true
-Dfelix.fileinstall.poll=5000
-Djava.endorsed.dirs=/usr/glassfish3/glassfish/modules/endorsed:/usr/glassfish3/glassfish/lib/endorsed
-Dfelix.fileinstall.bundles.startTransient=true
-Djavax.net.ssl.trustStore=/usr/glassfish3/glassfish/domains/domain1/config/cacerts.jks
-Dcom.sun.enterprise.security.httpsOutboundKeyAlias=s1as
-DANTLR_USE_DIRECT_CLASS_LOADING=true
-Djava.security.auth.login.config=/usr/glassfish3/glassfish/domains/domain1/config/login.conf
-Dgosh.args=--nointeractive
-Dosgi.shell.telnet.maxconn=1
-Djdbc.drivers=org.apache.derby.jdbc.ClientDriver
-Dfelix.fileinstall.dir=/usr/glassfish3/glassfish/modules/autostart/
-Dosgi.shell.telnet.port=6666
-Djava.security.policy=/usr/glassfish3/glassfish/domains/domain1/config/server.policy
-Dfelix.fileinstall.log.level=2
-Dcom.sun.enterprise.config.config_environment_factory_class=com.sun.enterprise.config.serverbeans.AppserverConfigEnvironmentFactory
-Dosgi.shell.telnet.ip=127.0.0.1
-Dcom.sun.aas.instanceRoot=/usr/glassfish3/glassfish/domains/domain1
-Dcom.sun.aas.installRoot=/usr/glassfish3/glassfish
-Djava.ext.dirs=/usr/java/jdk1.7.0_02/lib/ext:/usr/java/jdk1.7.0_02/jre/lib/ext:/usr/glassfish3/glassfish/domains/domain1/lib/ext
-Dfelix.fileinstall.bundles.new.start=true
-Dorg.glassfish.additionalOSGiBundlesToStart=org.apache.felix.shell,org.apache.felix.gogo.runtime,org.apache.felix.gogo.shell,org.apache.felix.gogo.command,org.apache.felix.fileinstall
-Djava.library.path=/usr/glassfish3/glassfish/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
com.sun.enterprise.glassfish.bootstrap.ASMain
-domainname
domain1
-asadmin-args
--host,,,localhost,,,--port,,,4848,,,--secure=false,,,--terse=false,,,--echo=false,,,--interactive=false,,,start-domain,,,--verbose=false,,,--debug=false,,,--domaindir,,,/usr/glassfish3/glassfish/domains,,,domain1
-instancename
server
-verbose
false
-debug
false
-asadmin-classpath
/usr/glassfish3/glassfish/modules/admin-cli.jar
-asadmin-classname
com.sun.enterprise.admin.cli.AsadminMain
-upgrade
false
-type
DAS
-domaindir
/usr/glassfish3/glassfish/domains/domain1
-read-stdin
True

-------------------------------server.log-------------------------------------------------------

I would appreciate any help I can get here.
Thanks.