[AMBARI-20270] NPE thrown if downscale is performed before all hosts registered with cluster.

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.5.0
• Component/s: ambari-server
• Assignee: Sebastian Toader
• Reporter: Sebastian Toader
• Created: 02/Mar/17 14:57
• Updated: 03/Mar/17 10:33
• Resolved: 03/Mar/17 09:36

Description

In case of a cluster provisioned using Blueprints if a downscale is performed before all hosts listed in the cluster creation template joined the server a NullPointerException is thrown.

27 Feb 2017 06:09:07,030 ERROR [ambari-client-thread-28] ContainerResponse:419 - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NullPointerException
at org.apache.ambari.server.topology.LogicalRequest.removeHostRequestByHostName(LogicalRequest.java:346)
at org.apache.ambari.server.controller.internal.HostResourceProvider.processDeleteHostRequests(HostResourceProvider.java:899)
at org.apache.ambari.server.controller.internal.HostResourceProvider.deleteHosts(HostResourceProvider.java:865)
at org.apache.ambari.server.orm.AmbariJpaLocalTxnInterceptor.invoke(AmbariJpaLocalTxnInterceptor.java:128)
at org.apache.ambari.server.controller.internal.HostResourceProvider$4.invoke(HostResourceProvider.java:345)
at org.apache.ambari.server.controller.internal.HostResourceProvider$4.invoke(HostResourceProvider.java:342)
at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:455)
at org.apache.ambari.server.controller.internal.AbstractResourceProvider.modifyResources(AbstractResourceProvider.java:336)
at org.apache.ambari.server.controller.internal.HostResourceProvider.deleteResourcesAuthorized(HostResourceProvider.java:342)
at org.apache.ambari.server.controller.internal.AbstractAuthorizedResourceProvider.deleteResources(AbstractAuthorizedResourceProvider.java:335)
at org.apache.ambari.server.controller.internal.ClusterControllerImpl.deleteResources(ClusterControllerImpl.java:339)
at org.apache.ambari.server.api.services.persistence.PersistenceManagerImpl.delete(PersistenceManagerImpl.java:132)
at org.apache.ambari.server.api.handlers.DeleteHandler.persist(DeleteHandler.java:49)
at org.apache.ambari.server.api.handlers.BaseManagementHandler.handleRequest(BaseManagementHandler.java:73)
at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:144)
at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:126)
at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:90)
at org.apache.ambari.server.api.services.HostService.deleteHost(HostService.java:194)