Error Starting Weblogic Admin Server: Could not reserve enough spacefor object heap

Error

"Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine. "

Reason for this error is when we make changes memory variable and assign more memory and we don't have enough memory available... server startup is failed with this error.

Solution

You can remove this error while decreasing heap size in setSOADomainEnvt.cmd

%ORACLE_HOME%\user_projects\domains\DOMAIN\BIN\setSOADomainEnvt.cmd

set DEFAULT_MEM_ARGS=-Xms512m -Xmx1024m
set PORT_MEM_ARGS=-Xms768m -Xmx1536m

set DEFAULT_MEM_ARGS=%DEFAULT_MEM_ARGS% -XX:PermSize=128m -XX:MaxPermSize=512m
set PORT_MEM_ARGS=%PORT_MEM_ARGS% -XX:PermSize=256m -XX:MaxPermSize=512m

Node Manager not reachable for machine "Local Machine", please ensure node manager service is running and port 5556

 While running Installer for Oracle AIA on local machine I faced following error

"Node Manager not reachable for machine "Local Machine", please ensure node manager service is running and port 5556". Because I forget to start Node manager ....

Solution

To start the nodemanager, you need to browse to MiddlewareHOME\wlserver_10.3\server\bin and execute "startNodeManager.cmd".

"nodemanager.properties" will get created under "MiddlewareHOME\wlserver_10.3\common\nodemanager\" once you start the nodemanager as shown in following GUI dump

You can also check the status of nodemanager from weblogic console.

1. Login to weblogic console.
2. Browse to Environment -> Machines in the Domain Structure panel (located left side)
3. Click on "LocalMachine".
4. Click on "Monitoring" tab to know the status of nodemanager.