[AMBARI-14901] NPE when configuring Kerberos at provisioning secure cluster with Blueprint

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.1
• Fix Version/s: 2.2.2
• Component/s: ambari-server
• Assignee: Magyari Sandor Szilard
• Reporter: Magyari Sandor Szilard
• Due: 04/Feb/16
• Created: 03/Feb/16 15:18
• Updated: 05/Feb/16 04:54
• Resolved: 04/Feb/16 23:18

Description

Provision a cluster with blueprint and enable kerberos with it. config_recommendation_strategy is ONLY_STACK_DEFAULTS_APPLY. The cluster installation will fail.

java.lang.NullPointerException
at org.apache.ambari.server.topology.ClusterConfigurationRequest.configureKerberos(ClusterConfigurationRequest.java:151)
at org.apache.ambari.server.topology.ClusterConfigurationRequest.process(ClusterConfigurationRequest.java:103)
at org.apache.ambari.server.topology.TopologyManager$ConfigureClusterTask.call(TopologyManager.java:764)
at org.apache.ambari.server.topology.TopologyManager$ConfigureClusterTask.call(TopologyManager.java:738)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

Suspicious code snippet:

Map<String, String> propertyMap = updatedConfigs.get(configType);
        Map<String, String> clusterConfigProperties = existingConfigurations.get(configType);
        Map<String, String> stackDefaultConfigProperties = stackDefaultProps.get(configType);
        for (String property : propertyMap.keySet()) {
          if (clusterConfigProperties == null || !clusterConfigProperties.containsKey(property)
                || (clusterConfigProperties.get(property) == null && stackDefaultConfigProperties.get(property) == null)
                || (clusterConfigProperties.get(property) != null && clusterConfigProperties.get(property).equals(stackDefaultConfigProperties.get(property))))