Getting error while developing hello-world microservice

I am getting an error while developing hello-world microservice sdk for java in Cumulocity Iot

com.nsn.cumulocity.clients-java:microservice-autoconfigure:pom:1015.0.278 failed to transfer from maven repository during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of cumulocity has elapsed or updates are forced. Original error: Could not transfer artifact com.nsn.cumulocity.clients-java:microservice-autoconfigure:pom:1015.0.278 from/to cumulocity (maven repository): PKIX path building failed: unable to find valid certification path to requested target

java-sdk version used: 11
c8y_version: 1015.0.278

Can you try this → java - Problems using Maven and SSL behind proxy - Stack Overflow ?

I’m guessing you are behind a corporate proxy causing that issue.

I tried the top 2 solutions given in the link.but the error persists,can you suggest any other solution?

This is a problem very related to your tooling, hardware and network infrastructure.
These answers should point you to a solution, assuming its an issue with certs of your corporate proxy:

make sure to not use but to download the certificate and import in your keystore locally.
Also your pom.xml should contain this blog of course: