Problem
Unable to start the WebLogic Admin server 11g (10.3.6) and getting "UnknownHostException"
Error Message
(1) Some times we will get the error message "
java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine"
<Dec 27, 2014 9:18:33 AM IST> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine.
java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine.
at weblogic.server.channels.BasicServerChannelImpl.getLocalHost(BasicServerChannelImpl.java:59)
at weblogic.server.channels.BasicServerChannelImpl.<clinit>(BasicServerChannelImpl.java:54)
at weblogic.rjvm.t3.ProtocolHandlerT3$ChannelInitializer.<clinit>(ProtocolHandlerT3.java:37)
at weblogic.rjvm.t3.ProtocolHandlerT3.getDefaultServerChannel(ProtocolHandlerT3.java:42)
at weblogic.server.channels.ChannelService.createServerChannels(ChannelService.java:506)
Truncated. see log file for complete stacktrace
Caused By: java.net.UnknownHostException: OEL: OEL
at java.net.InetAddress.getLocalHost(InetAddress.java:1360)
at weblogic.server.channels.BasicServerChannelImpl.getLocalHost(BasicServerChannelImpl.java:57)
at weblogic.server.channels.BasicServerChannelImpl.<clinit>(BasicServerChannelImpl.java:54)
at weblogic.rjvm.t3.ProtocolHandlerT3$ChannelInitializer.<clinit>(ProtocolHandlerT3.java:37)
at weblogic.rjvm.t3.ProtocolHandlerT3.getDefaultServerChannel(ProtocolHandlerT3.java:42)
Truncated. see log file for complete stacktrace
>
<Dec 27, 2014 9:18:34 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FAILED>
<Dec 27, 2014 9:18:34 AM IST> <Error> <WebLogicServer> <BEA-000383> <A critical service failed. The server will shut itself down>
<Dec 27, 2014 9:18:34 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FORCE_SHUTTING_DOWN>
(2) Some times we will get the error message "WLSGeneratorHelper - Unable to determine local host name or IP!"
2014-10-16 11:09:14,308 WARNING [16] com.oracle.cie.domain.WLSGeneratorHelper - Unable to determine local host name or IP!
java.net.UnknownHostException: OEL: OEL: unknown error
at java.net.InetAddress.getLocalHost(InetAddress.java:1484)
at com.oracle.cie.domain.WLSGeneratorHelper.initGeneratorStore(WLSGeneratorHelper.java:1263)
at com.oracle.cie.domain.WLSGeneratorHelper.initDomainGenerator(WLSGeneratorHelper.java:274)
at com.oracle.cie.domain.WLSGeneratorHelper.createDomainGenerator(WLSGeneratorHelper.java:176)
at com.oracle.cie.domain.WLSGeneratorHelper.createGenerator(WLSGeneratorHelper.java:519)
at com.oracle.cie.domain.WLSGeneratorHelper.createConfigAction(WLSGeneratorHelper.java:494)
at com.oracle.cie.wizard.domain.gui.tasks.ProgressGUITask.configure(ProgressGUITask.java:123)
at com.oracle.cie.wizard.domain.gui.tasks.ProgressGUITask.configure(ProgressGUITask.java:40)
at com.oracle.cie.wizard.internal.cont.AbstractTaskContainer.doConfigureTask(AbstractTaskContainer.java:119)
at com.oracle.cie.wizard.internal.cont.AbstractTaskContainer.setTask(AbstractTaskContainer.java:43)
at com.oracle.cie.wizard.internal.engine.WizardControllerEngine.goForward(WizardControllerEngine.java:720)
at com.oracle.cie.wizard.internal.engine.WizardControllerEngine.run(WizardControllerEngine.java:229)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: OEL: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
at java.net.InetAddress.getLocalHost(InetAddress.java:1479)
... 12 more
Cause
From the above log traces, the hostname or DNS Server name OEL is not configured. We have WebLogic Server installed on our Oracle Virtual Box
$ uname -a
Linux OEL 2.6.39-400.214.3.el6uek.x86_64 #1 SMP Thu Feb 13 17:08:24 PST 2014 x86_64 x86_64 x86_64 GNU/Linux
$ hostname
OEL
$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[mastshai@OEL mastan_domain]$
In the above hosts file, the OEL hostname entry was not present.
Solution
To fix the issue, we need to add the hostname or DNS server name in /etc/hosts file and bounced the Admin Server
$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 OEL
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
Unable to start the WebLogic Admin server 11g (10.3.6) and getting "UnknownHostException"
Error Message
(1) Some times we will get the error message "
java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine"
<Dec 27, 2014 9:18:33 AM IST> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine.
java.lang.AssertionError: Could not obtain the localhost address. The most likely cause is an error in the network configuration of this machine.
at weblogic.server.channels.BasicServerChannelImpl.getLocalHost(BasicServerChannelImpl.java:59)
at weblogic.server.channels.BasicServerChannelImpl.<clinit>(BasicServerChannelImpl.java:54)
at weblogic.rjvm.t3.ProtocolHandlerT3$ChannelInitializer.<clinit>(ProtocolHandlerT3.java:37)
at weblogic.rjvm.t3.ProtocolHandlerT3.getDefaultServerChannel(ProtocolHandlerT3.java:42)
at weblogic.server.channels.ChannelService.createServerChannels(ChannelService.java:506)
Truncated. see log file for complete stacktrace
Caused By: java.net.UnknownHostException: OEL: OEL
at java.net.InetAddress.getLocalHost(InetAddress.java:1360)
at weblogic.server.channels.BasicServerChannelImpl.getLocalHost(BasicServerChannelImpl.java:57)
at weblogic.server.channels.BasicServerChannelImpl.<clinit>(BasicServerChannelImpl.java:54)
at weblogic.rjvm.t3.ProtocolHandlerT3$ChannelInitializer.<clinit>(ProtocolHandlerT3.java:37)
at weblogic.rjvm.t3.ProtocolHandlerT3.getDefaultServerChannel(ProtocolHandlerT3.java:42)
Truncated. see log file for complete stacktrace
>
<Dec 27, 2014 9:18:34 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FAILED>
<Dec 27, 2014 9:18:34 AM IST> <Error> <WebLogicServer> <BEA-000383> <A critical service failed. The server will shut itself down>
<Dec 27, 2014 9:18:34 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FORCE_SHUTTING_DOWN>
(2) Some times we will get the error message "WLSGeneratorHelper - Unable to determine local host name or IP!"
2014-10-16 11:09:14,308 WARNING [16] com.oracle.cie.domain.WLSGeneratorHelper - Unable to determine local host name or IP!
java.net.UnknownHostException: OEL: OEL: unknown error
at java.net.InetAddress.getLocalHost(InetAddress.java:1484)
at com.oracle.cie.domain.WLSGeneratorHelper.initGeneratorStore(WLSGeneratorHelper.java:1263)
at com.oracle.cie.domain.WLSGeneratorHelper.initDomainGenerator(WLSGeneratorHelper.java:274)
at com.oracle.cie.domain.WLSGeneratorHelper.createDomainGenerator(WLSGeneratorHelper.java:176)
at com.oracle.cie.domain.WLSGeneratorHelper.createGenerator(WLSGeneratorHelper.java:519)
at com.oracle.cie.domain.WLSGeneratorHelper.createConfigAction(WLSGeneratorHelper.java:494)
at com.oracle.cie.wizard.domain.gui.tasks.ProgressGUITask.configure(ProgressGUITask.java:123)
at com.oracle.cie.wizard.domain.gui.tasks.ProgressGUITask.configure(ProgressGUITask.java:40)
at com.oracle.cie.wizard.internal.cont.AbstractTaskContainer.doConfigureTask(AbstractTaskContainer.java:119)
at com.oracle.cie.wizard.internal.cont.AbstractTaskContainer.setTask(AbstractTaskContainer.java:43)
at com.oracle.cie.wizard.internal.engine.WizardControllerEngine.goForward(WizardControllerEngine.java:720)
at com.oracle.cie.wizard.internal.engine.WizardControllerEngine.run(WizardControllerEngine.java:229)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: OEL: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
at java.net.InetAddress.getLocalHost(InetAddress.java:1479)
... 12 more
Cause
From the above log traces, the hostname or DNS Server name OEL is not configured. We have WebLogic Server installed on our Oracle Virtual Box
$ uname -a
Linux OEL 2.6.39-400.214.3.el6uek.x86_64 #1 SMP Thu Feb 13 17:08:24 PST 2014 x86_64 x86_64 x86_64 GNU/Linux
$ hostname
OEL
$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[mastshai@OEL mastan_domain]$
In the above hosts file, the OEL hostname entry was not present.
Solution
To fix the issue, we need to add the hostname or DNS server name in /etc/hosts file and bounced the Admin Server
$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 OEL
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
