Hi Team , 

Planning to perform the following upgrades [Tomcat (Current 8.3.15 to 9.0.31) and Java  (Current 1.8.0_181 to 1.8.0_241)] and running into the below mentioned exceptions.

In addition,do let us know the list of validation and test criteria required from a PRPC perspective.

Caused by: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: Default, provider: SunJSSE, class: sun.security.ssl.SSLContextImpl$DefaultSSLContext)                at java.security.Provider$Service.newInstance(Unknown Source) ~[?:1.8.0_241]                at sun.security.jca.GetInstance.getInstance(Unknown Source) ~[?:1.8.0_241]                at sun.security.jca.GetInstance.getInstance(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.SSLContext.getInstance(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.SSLContext.getDefault(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.SSLSocketFactory.getDefault(Unknown Source) ~[?:1.8.0_241]                at com.pega.pegarules.integration.engine.internal.ssl.SSLUtils.createSocketFactory(SSLUtils.java:527) ~[printegrint.jar:?]                at com.pega.pegarules.integration.engine.internal.ssl.SSLUtils.getSecureSocketFactory(SSLUtils.java:1266) ~[printegrint.jar:?]                at com.pega.pegarules.integration.engine.internal.util.PRServiceUtils.getSecureSocketFactory(PRServiceUtils.java:3294) ~[printegrint.jar:?]                at com.pega.pegarules.integration.engine.internal.connect.rest.RESTConnector.setupTLS(RESTConnector.java:825) ~[printegrint.jar:?]                at com.pega.pegarules.integration.engine.internal.connect.rest.RESTConnector.initializeHttpClient(RESTConnector.java:887) ~[printegrint.jar:?]                at com.pega.pegarules.integration.engine.internal.connect.rest.RESTConnector.perform(RESTConnector.java:407) ~[printegrint.jar:?]   Caused by: java.security.KeyStoreException: problem accessing trust store                at sun.security.ssl.TrustManagerFactoryImpl.engineInit(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.TrustManagerFactory.init(Unknown Source) ~[?:1.8.0_241]                at sun.security.ssl.SSLContextImpl$DefaultManagersHolder.getTrustManagers(Unknown Source) ~[?:1.8.0_241]                at sun.security.ssl.SSLContextImpl$DefaultManagersHolder.<clinit>(Unknown Source) ~[?:1.8.0_241]                at sun.security.ssl.SSLContextImpl$DefaultSSLContext.<init>(Unknown Source) ~[?:1.8.0_241]                at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_241]                at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_241]                at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_241]                at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_241]                at java.security.Provider$Service.newInstance(Unknown Source) ~[?:1.8.0_241]                at sun.security.jca.GetInstance.getInstance(Unknown Source) ~[?:1.8.0_241]                at sun.security.jca.GetInstance.getInstance(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.SSLContext.getInstance(Unknown Source) ~[?:1.8.0_241]                at javax.net.ssl.SSLContext.getDefault(Unknown Source) ~[?:1.8.0_241]