weblogic.nodemanager.common.ConfigException: Identity key store file not found: DemoIdentity.jks (SOA 12c)

We are getting below error while starting Node-manager in weblogic 12c server. Below is the steps to resolve the issue.

Error Message:

+ /usr/java/jdk1.8.0_112/bin/java -server -Xms32m -Xmx200m -Dweblogic.RootDirectory=/u01/soa_12c/Middleware/MW_Home/wlserver/../oracle_common/common/nodemanager -Dcoherence.home=/u01/soa_12c/Middleware/MW_Home/wlserver/../coherence -Dbea.home=/u01/soa_12c/Middleware/MW_Home/wlserver/.. -Xverify:none -Djava.system.class.loader=com.oracle.classloader.weblogic.LaunchClassLoader -Djava.security.policy=/u01/soa_12c/Middleware/MW_Home/wlserver/server/lib/weblogic.policy -Dweblogic.nodemanager.JavaHome=/usr/java/jdk1.8.0_112 weblogic.NodeManager -v

<Nov 29, 2016 9:25:18 AM IST> <INFO> <Loading domains file: /u01/soa_12c/Middleware/MW_Home/oracle_common/common/nodemanager/nodemanager.domains>

<Nov 29, 2016 9:25:18 AM IST> <WARNING> <Domains file not found: /u01/soa_12c/Middleware/MW_Home/oracle_common/common/nodemanager/nodemanager.domains>

<Nov 29, 2016 9:25:22 AM IST> <INFO> <Loading identity key store: FileName=/u01/soa_12c/Middleware/MW_Home/oracle_common/common/nodemanager/security/DemoIdentity.jks, Type=jks, PassPhraseUsed=true>

<Nov 29, 2016 9:25:22 AM IST> <SEVERE> <Fatal error in NodeManager server>

weblogic.nodemanager.common.ConfigException: Identity key store file not found: /u01/soa_12c/Middleware/MW_Home/oracle_common/common/nodemanager/security/DemoIdentity.jks

        at weblogic.nodemanager.server.SSLConfig.loadKeyStoreConfig(SSLConfig.java:225)

        at weblogic.nodemanager.server.SSLConfig.access$000(SSLConfig.java:33)

        at weblogic.nodemanager.server.SSLConfig$1.run(SSLConfig.java:118)

        at java.security.AccessController.doPrivileged(Native Method)

        at weblogic.nodemanager.server.SSLConfig.<init>(SSLConfig.java:115)

        at weblogic.nodemanager.server.NMServer.<init>(NMServer.java:143)

        at weblogic.nodemanager.server.NMServer.main(NMServer.java:527)

        at weblogic.NodeManager.main(NodeManager.java:31)

+ status=1

+ set +x

Fix:

Copy the file <domainhome>/security/DemoIdentity.jks to  <domainhome>/nodemanager/security/DemoIdentity.jks

Copy the file <domainhome>/security/DemoIdentity.jks to  <MW_Home>/oracle_common/common/nodemanager/security/DemoIdentity.jks