Aravindan Vijayan created AMBARI-14007:
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Summary: Fix precision issues in AMS.
Key: AMBARI-14007
URL: https://issues.apache.org/jira/browse/AMBARI-14007
Project: Ambari
Issue Type: Bug
Affects Versions: 2.1.2
Reporter: Aravindan Vijayan
Assignee: Aravindan Vijayan
Priority: Critical
Fix For: 2.1.3
Problem
The following error is seen in the ambari server log when different time
periods are selected in the Host page.
19 Nov 2015 22:27:50,476 ERROR [qtp-client-79] MetricsRequestHelper:96 - Error
getting timeline metrics :
{"exception":"BadRequestException","message":"java.lang.Exception: Requested
precision (SECONDS) for given time range causes result set size of 15840, which
exceeds the limit - 11520. Please request higher
precision.","javaClassName":"org.apache.hadoop.yarn.webapp.BadRequestException"}
Bug
The default metric service result limit of 11520 was not able to satisfy a
couple of specific cases of 22 host metrics requested for 2 hours in SECONDS
precision.
Fix
Change default limit to15840. Covers all time periods of all metric charts in
Ambari web. Introduce a simple 1 time retry mechanism in Ambari server
according to which the server retries AMS with the same request with higher
precision if a request fails due to PrecisionLimitExceededException.
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