I am using Spring boot 1.2.2 and JDK1.8.0.40, I have specified the SSL cipher suit as SSL_RSA_WITH_3DES_EDE_CBC_SHA and also import cer file to keystore.
SSL_RSA_WITH_3DES_EDE_CBC_SHA is an SSL 3 cipher suite. SSL 3 is insecure and disabled by default in Java 8. Is there any reason why you're using a ciphersuite for an insecure protocol?
If you want to stick to a single cipher suite, you can pick one that Java 8 supports.