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From "Jonathan Hurley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-18296) Database Consistency Check Fails With NPE With Missing Service From Stack
Date Thu, 01 Sep 2016 15:01:21 GMT
Jonathan Hurley created AMBARI-18296:
----------------------------------------

             Summary: Database Consistency Check Fails With NPE With Missing Service From
Stack
                 Key: AMBARI-18296
                 URL: https://issues.apache.org/jira/browse/AMBARI-18296
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 2.4.0
            Reporter: Jonathan Hurley
            Priority: Critical
             Fix For: trunk


The database consistency checker can fail if a service configuration exists for a service
which is no longer on the current stack:

{code}
2016-08-31 21:52:28,082 INFO - ******************************* Check database started *******************************
2016-08-31 21:52:31,647 INFO - Checking for configs not mapped to any cluster 2016-08-31 21:52:31,653
INFO - Checking for configs selected more than once 2016-08-31 21:52:31,655 INFO - Checking
for hosts without state 2016-08-31 21:52:31,657 INFO - Checking host component states count
equals host component desired states count 2016-08-31 21:52:31,660 INFO - Checking services
and their configs 2016-08-31 21:52:33,669 ERROR - Unexpected error, database check failed
java.lang.NullPointerException at org.apache.ambari.server.checks.DatabaseConsistencyCheckHelper.checkServiceConfigs(DatabaseConsistencyCheckHelper.java:543)
at org.apache.ambari.server.checks.DatabaseConsistencyChecker.main(DatabaseConsistencyChecker.java:115)
{code}

It seems like what happens is this query returns a service which is not defined in the current
stack:

{code}
SELECT
  c.cluster_name,
  cs.service_name,
  cc.type_name,
  sc.version
FROM clusterservices cs
JOIN serviceconfig sc
  ON cs.service_name = sc.service_name
  AND cs.cluster_id = sc.cluster_id
JOIN serviceconfigmapping scm
  ON sc.service_config_id = scm.service_config_id
JOIN clusterconfig cc
  ON scm.config_id = cc.config_id
  AND sc.cluster_id = cc.cluster_id
JOIN clusters c
  ON cc.cluster_id = c.cluster_id
  AND sc.stack_id = c.desired_stack_id
WHERE sc.group_id IS NULL
AND sc.service_config_id = (SELECT
  MAX(service_config_id)
FROM serviceconfig sc2
WHERE sc2.service_name = sc.service_name
AND sc2.cluster_id = sc.cluster_id)
GROUP BY c.cluster_name,
         cs.service_name,
         cc.type_name,
         sc.version
{code}

Problem area of code:
{code:title=serviceInfo is null}
        for (String serviceName : serviceNames) {
          ServiceInfo serviceInfo = serviceInfoMap.get(serviceName);
          Set<String> configTypes = serviceInfo.getConfigTypeAttributes().keySet();
          for (String configType : configTypes) {
            stackServiceConfigs.put(serviceName, configType);
          }
        }
{code}



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