Java Keystore unable to add X509Certificate to Keystore

I am facing a weird error when I try to add a certificate to Keystore.

System.out.println(x509Certificate.getPublicKey()); // prints public key, certificate is valid
GlobalStoreManager.getInstance().getSPATruststore().setCertificateEntry(name, x509Certificate); // no error
System.out.println(GlobalStoreManager.getInstance().getSPATruststore().getCertificate(name)); // null

Why is the setCertificateEntry is not throwing any error and still getCertificate returns null?

Update:

I tried to get the certificate alias right after calling setCertificateEntry() and it worked??!, so the problems seems to be with getCertificate() call rather than setCertificateEntry() call?

System.out.println(GlobalStoreManager.getInstance().getSPATruststore().getCertificateAlias(x509Certificate));

Thanks.