[AMBARI-24473] Ambari upgrade fails due to NPE when processing Ambari Infra kerberos descriptor changes

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.7.1
• Component/s: ambari-server
• Labels: pull-request-available
• Assignee: Oliver Szabo
• Reporter: Oliver Szabo
• Created: 14/Aug/18 11:56
• Updated: 15/Aug/18 17:55
• Resolved: 15/Aug/18 17:21

Description

Ambari upgrade fails due to NPE when processing Ambari Infra changes

2018-07-17 01:57:48,282 ERROR [main] SchemaUpgradeHelper:238 - Upgrade failed.
java.lang.NullPointerException
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.updateInfraKerberosDescriptor(UpgradeCatalog270.java:1282)
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.updateKerberosDescriptorArtifact(UpgradeCatalog270.java:1202)
                at org.apache.ambari.server.upgrade.AbstractUpgradeCatalog.updateKerberosDescriptorArtifacts(AbstractUpgradeCatalog.java:797)
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.executeDMLUpdates(UpgradeCatalog270.java:1052)
                at org.apache.ambari.server.upgrade.AbstractUpgradeCatalog.upgradeData(AbstractUpgradeCatalog.java:985)
                at org.apache.ambari.server.upgrade.SchemaUpgradeHelper.executeDMLUpdates(SchemaUpgradeHelper.java:236)
                at org.apache.ambari.server.upgrade.SchemaUpgradeHelper.main(SchemaUpgradeHelper.java:456)
2018-07-17 01:57:48,282 ERROR [main] SchemaUpgradeHelper:473 - Exception occurred during upgrade, failed
org.apache.ambari.server.AmbariException
                at org.apache.ambari.server.upgrade.SchemaUpgradeHelper.executeDMLUpdates(SchemaUpgradeHelper.java:239)
                at org.apache.ambari.server.upgrade.SchemaUpgradeHelper.main(SchemaUpgradeHelper.java:456)
Caused by: java.lang.NullPointerException
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.updateInfraKerberosDescriptor(UpgradeCatalog270.java:1282)
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.updateKerberosDescriptorArtifact(UpgradeCatalog270.java:1202)
                at org.apache.ambari.server.upgrade.AbstractUpgradeCatalog.updateKerberosDescriptorArtifacts(AbstractUpgradeCatalog.java:797)
                at org.apache.ambari.server.upgrade.UpgradeCatalog270.executeDMLUpdates(UpgradeCatalog270.java:1052)
                at org.apache.ambari.server.upgrade.AbstractUpgradeCatalog.upgradeData(AbstractUpgradeCatalog.java:985)
                at org.apache.ambari.server.upgrade.SchemaUpgradeHelper.executeDMLUpdates(SchemaUpgradeHelper.java:236)
                ... 1 more

This appears to be due to a failure to handle the case where no component-level Kerberos descriptors are supplied for a service in the user-supplied Kerberos descriptor. Since the user-supplied Kerberos descriptor can be sparse, missing normally expected pieces of the Kerberos descriptor is acceptable.

Issue Links

• links to: GitHub Pull Request #2069
• links to: GitHub Pull Request #2070