PKIX path building failed: unable to find valid certification path to requested target

You need to set certificate to hit this url. use below code to set keystore:

System.setProperty("javax.net.ssl.trustStore","clientTrustStore.key");System.setProperty("javax.net.ssl.trustStorePassword","qwerty");

Java 8 Solution: I just had this problem and solved it by adding the remote site's certificate to my Java keystore. My solution was based on the solution at the myshittycode blog, which was based on a previous solution in mykong's blog. These blog article solutions boil down to downloading a program called InstallCert, which is a Java class you can run from the command line to obtain the certificate. You then proceed to install the certificate in Java's keystore.

The InstallCert Readme worked perfectly for me. You just need to run the following commands:

1. javac InstallCert.java
2. java InstallCert [host]:[port] (Enter the given list number of the certificate you want to add in the list when you run the command - likely just 1)
3. keytool -exportcert -alias [host]-1 -keystore jssecacerts -storepass changeit -file [host].cer
4. sudo keytool -importcert -alias [host] -keystore [path to system keystore] -storepass changeit -file [host].cer

See the referenced README file for an example if need be.

I've run into this a few times and it was due to a certificate chain being incomplete. If you are using the standard java trust store, it may not have a certificate that is needed to complete the certificate chain which is required to validate the certificate of the SSL site you are connecting to.

I ran into this problem with some DigiCert certificates and had to manually add the intermediary cert myself.