Thanks Doroszlai.

ambari-server.log has below exception. Why it tries to find a redhat7? I am
using oracle linux 7 which is supported by ambari.

java.lang.RuntimeException:
org.apache.ambari.server.controller.spi.SystemException: Operating System
matching redhat7 could not be found

        at
org.apache.ambari.server.actionmanager.ExecutionCommandWrapper.getExecutionCommand(ExecutionCommandWrapper.java:253)

        at
org.apache.ambari.server.actionmanager.ActionScheduler.processInProgressStage(ActionScheduler.java:704)

        at
org.apache.ambari.server.actionmanager.ActionScheduler.doWork(ActionScheduler.java:417)

        at
org.apache.ambari.server.actionmanager.ActionScheduler.run(ActionScheduler.java:310)

        at java.lang.Thread.run(Thread.java:745)

Caused by: org.apache.ambari.server.controller.spi.SystemException:
Operating System matching redhat7 could not be found

        at
org.apache.ambari.server.state.stack.upgrade.RepositoryVersionHelper.getOSEntityForHost(RepositoryVersionHelper.java:422)

        at
org.apache.ambari.server.actionmanager.ExecutionCommandWrapper.getExecutionCommand(ExecutionCommandWrapper.java:247)

        ... 4 more

Thanks for any clue.

On Tue, Feb 6, 2018 at 10:08 AM, Doroszlai, Attila <adorosz...@apache.org>
wrote:

> Hi Lian,
>
> Please take a look at /var/log/ambari-server/ambari-server.log, it
> will likely have some information about the problem.  It may be
> waiting for agents to join, or it may have some misconfiguration that
> it failed to detect when the blueprint and cluster were submitted,
> etc.
>
> The fact that it is stuck at PENDING "forever" is a bug that's fixed
> in https://issues.apache.org/jira/browse/AMBARI-22805
>
> -Attila
>
> On Tue, Feb 6, 2018 at 6:51 PM, Lian Jiang <jiangok2...@gmail.com> wrote:
> > Hi,
> >
> > I am following
> > https://cwiki.apache.org/confluence/display/AMBARI/
> Blueprints#Blueprints-ExampleBlueprint.1
> > to create a two nodes cluster using blueprint and a cluster template.
> >
> > After submitting cluster creation request, the status stuck at:
> >
> > "href" : "http://localhost:8080/api/v1/clusters/mycluster/requests/1";,
> >
> >   "Requests" : {
> >
> >     "aborted_task_count" : 0,
> >
> >     "cluster_host_info" : "{}",
> >
> >     "cluster_name" : "mycluster",
> >
> >     "completed_task_count" : 0,
> >
> >     "create_time" : 1517937973997,
> >
> >     "end_time" : -1,
> >
> >     "exclusive" : false,
> >
> >     "failed_task_count" : 0,
> >
> >     "id" : 1,
> >
> >     "inputs" : null,
> >
> >     "operation_level" : null,
> >
> >     "pending_host_request_count" : 0,
> >
> >     "progress_percent" : 0.0,
> >
> >     "queued_task_count" : 0,
> >
> >     "request_context" : "Logical Request: Provision Cluster 'mycluster'",
> >
> >     "request_schedule" : null,
> >
> >     "request_status" : "PENDING",
> >
> >     "resource_filters" : null,
> >
> >     "start_time" : -1,
> >
> >     "task_count" : 20,
> >
> >     "timed_out_task_count" : 0,
> >
> >     "type" : null
> >
> >   },
> >
> >
> > As you can see, the tasks are not scheduled. I am using horton ambari
> > 2.6.1.0. Any idea how to debug this issue? Appreciate any help!
> >
> >
>

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