We are setting up DXA1.5(Example Site) by using the below software on Presentation Server
IBM Web sphere application server 220.127.116.11 java version jdk 1.7 Apache maven 3.3.9
We are able to build the ear successfully using maven 3.3.9 and jdk 1.7, but when we are deploying in web sphere application server(jdk 1.7 is also used), get the below error. Also we have checked the below unsupported class where lambda expression is being used.
06:49:10.405 [server.startup : 1] ERROR o.s.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [wsjar:file:/webAS/installedApps/com.td.wae.tdca.ear/lib/dxa-common-api-1.5.0.jar!/com/sdl/webapp/common/api/contextengine/ContextClaims.class]; nested exception is java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=org/jetbrains/annotations/Nullable, offset=6
With reference to the below link, we have found that we should use jdk 1.7 or later for both compiling and deploying. So we have used jdk 1.7 and websphere which is compatible with jdk 1.7. But during the deployment the class ContextClaims shows bad major version error.
Could you please suggest if we need to use jdk 1.8 for compiling and executing the application or some other feasible solutions.