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Review request for Ambari, John Speidel, Sumit Mohanty, and Sid Wagle. Bugs: AMBARI-12429 https://issues.apache.org/jira/browse/AMBARI-12429 Repository: ambari Description ------- Created a cluster with multiple hosts, then stopped all of the services on 1 host (preferably one with only clients so it has nothing to stop). Then deleted the host using the API. E.g., curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http://c6401.ambari.apache.org:8080/api/v1/hosts/c6404.ambari.apache.org This led to Null Pointer Exceptions in ambari-server Diffs ----- ambari-server/src/main/java/org/apache/ambari/server/actionmanager/Request.java faebb20 ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java de9ae52 ambari-server/src/main/java/org/apache/ambari/server/controller/internal/HostResourceProvider.java 4c14426 ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestOperationLevel.java c7c0160 ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RequestResourceProvider.java fa49d7f ambari-server/src/main/java/org/apache/ambari/server/orm/dao/RequestOperationLevelDAO.java PRE-CREATION ambari-server/src/main/java/org/apache/ambari/server/orm/entities/RequestOperationLevelEntity.java 2c11e55 ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClustersImpl.java 665dd56 ambari-server/src/main/java/org/apache/ambari/server/state/svccomphost/ServiceComponentHostImpl.java 9f25ad7 ambari-server/src/test/java/org/apache/ambari/server/controller/internal/RequestOperationLevelTest.java bd4ad90 ambari-server/src/test/java/org/apache/ambari/server/controller/internal/RequestResourceProviderTest.java ed8336e Diff: https://reviews.apache.org/r/36564/diff/ Testing ------- Still running system tests, and waiting for unit test results. Thanks, Alejandro Fernandez