Hi, Nitin

I am not sure what version of RQM you are using and what Java (version) you have got to run CLI adapter.
There are several things you can check with:

1) user role's permissions for you to run adapter, you need the below permissions:

. Register Tool Adapter
. Save Adapter request
. XML Import

2) If using Oracle Java, try IBM Java

3) in CLI adapter's start.bat(or start.sh), you may need to specify the protocol used such as TLSv1, TLSv1.1 or TLSv1.2:
java.exe -Dhttps.protocols=TLSv1 -Djdk.tls.client.protocols=TLSv1

This appears to be a Java issue. If the server you try to connect to is FIPS enabled, all your clients have to be configured to handle FIPS properly. For a simple start, add the provider com.ibm.crypto.fips.provider.IBMJCEFIPS to the java.security file of the JRE/JDK you're using. You can see instructions as below.
https://www.ibm.com/support/knowledgecenter/SSKTXQ_9.0.0/admin/config/config_sec_fips_add_ibmjcefips.html
https://www.ibm.com/support/knowledgecenter/en/SSSHTQ_8.1.0/com.ibm.netcool_OMNIbus.doc_8.1.0/omnibus/wip/install/task/omn_con_configuringjreforfips.html
(Only the part about java.security is needed, and you can ignore the rest of the documents)