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Posted to user@ambari.apache.org by Fay Wang <fa...@yahoo.com> on 2016/05/30 23:20:43 UTC

NPE in AbstractResourceProvider

Hi, 
   We encounter this NPE when trying to logon to Ambari UI. Any help is highly appreciated....

30 May 2016 22:55:48,883  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,883  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,884  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,884  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,885  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,885  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:52,354 ERROR [qtp-client-57] ReadHandler:91 - Caught a runtime exception executing a query
java.lang.NullPointerException
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.toResource(AlertResourceProvider.java:199)
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.getResources(AlertResourceProvider.java:179)
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.queryForResources(AlertResourceProvider.java:135)
    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:489)
    at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:388)
    at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:224)

Re: NPE in AbstractResourceProvider

Posted by Jonathan Hurley <jh...@hortonworks.com>.

We'd need to know which version of Ambari you're using. This type of error can typically be seen in one of two scenarios:

- You're using MySQL with MyISAM as the database engine. MyISAM doesn't support transactions or foreign keys and can lead to a corrupted Ambari database.

- You're using an older build of Ambari which had issues with cached JPA entities. As a result, a restart usually fixes the issue.

On May 30, 2016, at 7:20 PM, Fay Wang <fa...@yahoo.com>> wrote:

Hi,
   We encounter this NPE when trying to logon to Ambari UI. Any help is highly appreciated....

30 May 2016 22:55:48,883  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,883  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,884  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,884  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,885  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:48,885  INFO [qtp-client-57] MetricsPropertyProvider:526 - METRICS_COLLECTOR is not live. Skip populating resources with metrics.
30 May 2016 22:55:52,354 ERROR [qtp-client-57] ReadHandler:91 - Caught a runtime exception executing a query
java.lang.NullPointerException
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.toResource(AlertResourceProvider.java:199)
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.getResources(AlertResourceProvider.java:179)
    at org.apache.ambari.server.controller.internal.AlertResourceProvider.queryForResources(AlertResourceProvider.java:135)
    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:489)
    at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:388)
    at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:224)