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From "Robert Nettleton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-17758) LogSearch Integration NullPointerException when LogSearch connection not available
Date Sat, 16 Jul 2016 18:19:20 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-17758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Nettleton updated AMBARI-17758:
--------------------------------------
    Attachment: AMBARI-17758.patch

Uploaded initial patch.


> LogSearch Integration NullPointerException when LogSearch connection not available
> ----------------------------------------------------------------------------------
>
>                 Key: AMBARI-17758
>                 URL: https://issues.apache.org/jira/browse/AMBARI-17758
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.4.0
>            Reporter: Robert Nettleton
>            Assignee: Robert Nettleton
>            Priority: Critical
>             Fix For: 2.4.0
>
>         Attachments: AMBARI-17758.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> The following NullPointerException can occur intermittently in the LogSearch integration
code in the Ambari REST layer:
> {code}
> java.lang.NullPointerException
> 	at org.apache.ambari.server.controller.logging.LogSearchDataRetrievalService.getLogFileTailURI(LogSearchDataRetrievalService.java:159)
> 	at org.apache.ambari.server.controller.logging.LoggingSearchPropertyProvider.populateResources(LoggingSearchPropertyProvider.java:92)
> 	at org.apache.ambari.server.controller.internal.ClusterControllerImpl.populateResources(ClusterControllerImpl.java:155)
> 	at org.apache.ambari.server.api.query.QueryImpl.queryForSubResources(QueryImpl.java:500)
> 	at org.apache.ambari.server.api.query.QueryImpl.queryForSubResources(QueryImpl.java:503)
> 	at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:454)
> 	at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:222)
> 	at org.apache.ambari.server.api.handlers.ReadHandler.handleRequest(ReadHandler.java:77)
> 	at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:145)
> 	at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:126)
> 	at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:90)
> 	at org.apache.ambari.server.api.services.ClusterService.getCluster(ClusterService.java:91)
> 	at sun.reflect.GeneratedMethodAccessor255.invoke(Unknown Source)
> {code}
> While the code that calls the LogSearchDataRetrievalService already has a check to determine
if the LoggingRequestHelper is available (non-null), there is a change that a service might
be stopped or crashes unexpected in between the initial check and this call.  
> This is usually an intermittent exception.
> The LogSearchDataRetrievalService should be updated to include a check for null when
attempting to access the LoggingRequestHelper implementation.
> I'm working on a fix for this, and will be submitting a patch shortly.



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