wldeploy: java.lang.NoClassDefFoundError: weblogic/Deployer

Even after running setDomainEnv.sh, the wldeploy throws below NoClassDefFoundError.

Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/Deployer
Caused by: java.lang.ClassNotFoundException: weblogic.Deployer
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: weblogic.Deployer.  Program will exit.

An alternative way to run is to put the weblogic.jar on the classpath and run the wldeploy task as below.

java -cp /home/user/Oracle/Middleware/wlserver_10.3/server/lib/weblogic.jar weblogic.Deployer -adminurl t3://localhost:7001 -username ...