Robert Nettleton created AMBARI-17758:
-----------------------------------------
Summary: 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
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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