[AMBARI-21480] NPE during "Update Kerberos Descriptor"

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.5.2
• Component/s: ambari-server
• Labels: express_upgrade rolling_upgrade upgrade
• Assignee: Robert Levas
• Reporter: Robert Levas
• Created: 14/Jul/17 18:47
• Updated: 14/Jul/17 21:31
• Resolved: 14/Jul/17 20:46

Description

Ambari-server.log:-

java.lang.NullPointerException
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.processIdentity(KerberosDescriptorUpdateHelper.java:360)
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.processIdentities(KerberosDescriptorUpdateHelper.java:321)
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.processComponent(KerberosDescriptorUpdateHelper.java:230)
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.processService(KerberosDescriptorUpdateHelper.java:195)
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.processServices(KerberosDescriptorUpdateHelper.java:122)
	at org.apache.ambari.server.state.kerberos.KerberosDescriptorUpdateHelper.updateUserKerberosDescriptor(KerberosDescriptorUpdateHelper.java:78)
	at org.apache.ambari.server.serveraction.upgrades.UpgradeUserKerberosDescriptor.execute(UpgradeUserKerberosDescriptor.java:139)
	at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.execute(ServerActionExecutor.java:517)
	at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.run(ServerActionExecutor.java:454)
	at java.lang.Thread.run(Thread.java:748)

Cause
This is caused by having a custom/unexpected identity in the user-supplied Kerberos descriptor that is not in the Kerberos descriptor from the initial stack.

Solution
Ignore the custom/unexpected identity since the user must have added that manually and it is expected that it should remain untouched after the upgrade process.

Issue Links

• links to: ReviewBoard