[AMBARI-23139] Ambari schema upgrade failed due to NPE while fetching 'version_url'

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.7.0
• Component/s: ambari-server
• Labels: system_test
• Assignee: Unassigned
• Reporter: Vivek Sharma
• Created: 05/Mar/18 06:38
• Updated: 05/Mar/18 08:37
• Resolved: 05/Mar/18 08:37

Description

STR

1. Deployed cluster with Ambari version: 2.6.1.0-143 and HDP version: 2.6.4.0-91(blueprint based install)
2. Perform an upgrade to Ambari-2.7.0.2-64

Result
Error during schema upgrade

04 Mar 2018 10:45:52,254 ERROR [ambari-client-thread-198] AbstractResourceProvider:285 - Caught AmbariException when creating a resource
org.apache.ambari.server.AmbariException: Could not load url from . null
 at org.apache.ambari.server.controller.internal.VersionDefinitionResourceProvider.loadXml(VersionDefinitionResourceProvider.java:583)
 at org.apache.ambari.server.controller.internal.VersionDefinitionResourceProvider.access$000(VersionDefinitionResourceProvider.java:90)
 at org.apache.ambari.server.controller.internal.VersionDefinitionResourceProvider$1.invoke(VersionDefinitionResourceProvider.java:234)
 at org.apache.ambari.server.controller.internal.VersionDefinitionResourceProvider$1.invoke(VersionDefinitionResourceProvider.java:228)
 at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:455)
 at org.apache.ambari.server.controller.internal.AbstractResourceProvider.createResources(AbstractResourceProvider.java:278)
 at org.apache.ambari.server.controller.internal.VersionDefinitionResourceProvider.createResourcesAuthorized(VersionDefinitionResourceProvider.java:228)
 at org.apache.ambari.server.controller.internal.AbstractAuthorizedResourceProvider.createResources(AbstractAuthorizedResourceProvider.java:220)
 at org.apache.ambari.server.controller.internal.ClusterControllerImpl.createResources(ClusterControllerImpl.java:298)

Looks like the issue is because 'version_url' column is NULL in repo_version table.
Checked in another environment and found that 'version_url' column can be NULL if the version is registered directly from UI without pointing to a VDF file.

Suspect the issue to be due to below commit:
https://github.com/apache/ambari/commit/e77a31ab0aa7edbabba29ba8e4d40becf122deef#diff-9ae243c3d72b438f562e3f250996de6eR187
where 'VersionDefinition' is also now included as pat of 'createResources' call

 

Issue Links

• duplicates: AMBARI-23129 Multiple issues while executing Ambari server upgrade to Ambari 2.7.0