Possible NullPointerException in LDAPUserGroupCallbackImpl

1. Configure LDAP integration with PAM ( https://access.redhat.com/solutions/4033931 ) 2. Configure the LDAP base DN incorrectly intentionally - so later it will not return correct user data 2. Create some process instances with human tasks 3. In "Task Inbox" page in business-central, trigger the LDAP search operation via changing the "Status" filter on left side , receive the error message (attaching screenshot) 4. Go to kie-server and check the server.log, find stacktraces like below 2021-11-09 11:03:05,710 ERROR [org.kie.server.remote. rest .jbpm.QueryDataResource] ( default task-2) Unexpected error: java.lang.NullPointerException at org.jbpm.services.task.identity.LDAPUserGroupCallbackImpl.getGroupsForUser(LDAPUserGroupCallbackImpl.java:127) at org.jbpm.kie.services.impl.query.preprocessor.PotOwnerTasksPreprocessor.preprocess(PotOwnerTasksPreprocessor.java:65) at org.dashbuilder.dataset.DataSetManagerImpl.lookupDataSet(DataSetManagerImpl.java:150) at org.jbpm.kie.services.impl.query.QueryServiceImpl.query(QueryServiceImpl.java:310) at org.jbpm.kie.services.impl.query.QueryServiceImpl.query(QueryServiceImpl.java:250) at org.kie.server.services.jbpm.QueryDataServiceBase.queryFiltered(QueryDataServiceBase.java:188) at org.kie.server.services.jbpm.QueryDataServiceBase.queryFiltered(QueryDataServiceBase.java:146) at org.kie.server.remote. rest .jbpm.QueryDataResource.runQueryFiltered(QueryDataResource.java:367)