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https://issues.apache.org/jira/browse/AMBARI-12450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632099#comment-14632099
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Hadoop QA commented on AMBARI-12450:
------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12745877/AMBARI-12450_01.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
ambari-server.
Test results:
https://builds.apache.org/job/Ambari-trunk-test-patch/3418//testReport/
Console output:
https://builds.apache.org/job/Ambari-trunk-test-patch/3418//console
This message is automatically generated.
> Kerberos: ServiceResourceProvider queries for KDC connectivity when not needed
> ------------------------------------------------------------------------------
>
> Key: AMBARI-12450
> URL: https://issues.apache.org/jira/browse/AMBARI-12450
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.0.0, 2.0.1, 2.1.0
> Reporter: Robert Levas
> Assignee: Robert Levas
> Labels: kerberos, rest_api
> Fix For: 2.1.1
>
> Attachments: AMBARI-12450_01.patch
>
>
> When querying for information about services installed in a Kerberized
> cluster via the REST API, the ServiceResourceProvider always attempts to
> contact the KDC (or Active Directory) if the KERBEROS service is selected
> within the query.
> This can be seen about every 15 seconds, when the UI queries for the state
> of the services in a Kerberized cluster using the following query:
> {noformat}
> GET
> /api/v1/clusters/{cluster_name}/services?fields=ServiceInfo/state,ServiceInfo/maintenance_state&minimal_response=true
> {noformat}
> The result from this query does not contain the KDC connectivity attributes
> (which is expected), yet the detail are obtained.
> This issue causes excess overhead in Ambari as well as on the relevant KDC or
> Active Directory. Also the kdamin.log fills up with messages like:
> {noformat:title=/var/log/kadmind.log}
> Jun 29 14:31:42 some-host-1 kadmind[2383](Notice): Request: kadm5_init,
> admin/[email protected], success, client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128, vers=3, flavor=6
> Jun 29 14:31:42 some-host-1 kadmind[2383](Notice): Request:
> kadm5_get_principal, admin/[email protected], success,
> client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128
> Jun 29 14:31:42 some-host-1 kadmind[2383](info): closing down fd 29
> Jun 29 14:32:49 some-host-1 kadmind[2383](Notice): Request: kadm5_init,
> admin/[email protected], success, client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128, vers=3, flavor=6
> Jun 29 14:32:49 some-host-1 kadmind[2383](Notice): Request:
> kadm5_get_principal, admin/[email protected], success,
> client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128
> Jun 29 14:32:49 some-host-1 kadmind[2383](info): closing down fd 29
> Jun 29 14:34:35 some-host-1 kadmind[2383](Notice): Request: kadm5_init,
> admin/[email protected], success, client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128, vers=3, flavor=6
> Jun 29 14:34:35 some-host-1 kadmind[2383](Notice): Request:
> kadm5_get_principal, admin/[email protected], success,
> client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128
> Jun 29 14:34:35 some-host-1 kadmind[2383](info): closing down fd 29
> Jun 29 14:35:28 some-host-1 kadmind[2383](Notice): Request: kadm5_init,
> admin/[email protected], success, client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128, vers=3, flavor=6
> Jun 29 14:35:28 some-host-1 kadmind[2383](Notice): Request:
> kadm5_get_principal, admin/[email protected], success,
> client=admin/[email protected],
> service=kadmin/[email protected],
> addr=10.240.70.128
> Jun 29 14:35:28 some-host-1 kadmind[2383](info): closing down fd 29
> {noformat}
> *Solution*
> Only query for the KDC attributes when explicitly or implicitly queried. This
> can be done by conditionally setting the relevant properties near
> {{org/apache/ambari/server/controller/internal/ServiceResourceProvider.java:1394}}
> by inspecting the request for relevant identifiers using something like the
> following:
> {code}
> requestedIds.contains(propertyId) || isPropertyCategoryRequested(propertyId,
> requestedIds);
> {code}
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