[jira] [Created] (AMBARI-12821) [PluggableStackDefinition] RU: Pre-req checks while performing upgrade fail with 'Reason: Unexpected server error happened'

["Jayush Luniya (JIRA)" <ji...@apache.org>]

Jayush Luniya created AMBARI-12821:
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             Summary: [PluggableStackDefinition] RU: Pre-req checks while performing upgrade fail with 'Reason: Unexpected server error happened'
                 Key: AMBARI-12821
                 URL: https://issues.apache.org/jira/browse/AMBARI-12821
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 2.1.1
            Reporter: Jayush Luniya
            Assignee: Jayush Luniya
            Priority: Blocker
             Fix For: 2.1.1


on started "Perform Upgrade" all pre-req checks fail with error "Reason: Unexpected server error happened". 

{code}
18 Aug 2015 17:38:01,947 ERROR [qtp-client-20] CheckHelper:72 - Check CONFIG_MERGE failed
java.lang.RuntimeException: StackId with different names cannot be compared.
        at org.apache.ambari.server.state.StackId.compareTo(StackId.java:131)
        at org.apache.ambari.server.checks.AbstractCheckDescriptor.isApplicable(AbstractCheckDescriptor.java:103)
        at org.apache.ambari.server.checks.ConfigurationMergeCheck.isApplicable(ConfigurationMergeCheck.java:54)
        at org.apache.ambari.server.state.CheckHelper.performChecks(CheckHelper.java:57)
        at org.apache.ambari.server.controller.internal.PreUpgradeCheckResourceProvider.getResources(PreUpgradeCheckResourceProvider.java:144)
        at org.apache.ambari.server.controller.internal.ClusterControllerImpl$ExtendedResourceProviderWrapper.queryForResources(ClusterControllerImpl.java:945)
        at org.apache.ambari.server.controller.internal.ClusterControllerImpl.getResources(ClusterControllerImpl.java:132)
        at org.apache.ambari.server.api.query.QueryImpl.doQuery(QueryImpl.java:482)
        at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:381)
        at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:217)
        at org.apache.ambari.server.api.handlers.ReadHandler.handleRequest(ReadHandler.java:68)
        at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:135)
        at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:105)
        at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:74)
        at org.apache.ambari.server.api.services.PreUpgradeCheckService.getPreUpgradeChecks(PreUpgradeCheckService.java:62)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
{code}

This is because in ambari/ambari-server/src/main/java/org/apache/ambari/server/checks/AbstractCheckDescriptor.java the min source stack is hardcoded to HDP-2.2 and hence HDP-2.2 is compared to generated stack leading to the above exception. We need to make this config driven

{code}
  /**
   * Gets the earliest stack that the upgrade check is compatible with. By
   * default, all checks will return {@link #STACK_HDP_22} since this is the
   * first version of HDP that supports automated upgrades.
   *
   * @return the earliest stack that the upgrade check is compatible with, or
   *         {@code null} for all.
   */
  public StackId getSourceStack(){
    return STACK_HDP_22;
  }
{code}




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