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https://issues.apache.org/jira/browse/AMBARI-25963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17753960#comment-17753960
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Mohammad Arshad commented on AMBARI-25963:
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Thanks [~vjasani], [~brahmareddy] for review.
Thanks [~vishalsuvagia] for review and merge.
> Metrics metadata sync problem, accessing metrics which got created though
> other collector throws NPE
> ----------------------------------------------------------------------------------------------------
>
> Key: AMBARI-25963
> URL: https://issues.apache.org/jira/browse/AMBARI-25963
> Project: Ambari
> Issue Type: Bug
> Affects Versions: metrics-3.0.0
> Reporter: Mohammad Arshad
> Assignee: Mohammad Arshad
> Priority: Critical
> Labels: pull-request-available
> Fix For: 2.8.0, metrics-3.1.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Metrics metadata sync problem, accessing metrics which got created though
> other collector throws NPE
> *Steps to reproduce the issue:*
> # Install ambari metrics with two collectors C1 and C2
> # Submit following metrics through collector C1
> {code:java}
> {
> "metrics": [
> {
> "metricname": "cpu",
> "appid": "skywalking",
> "hostname": "hostXYZ",
> "starttime": 1687944230477,
> "metrics": {
> "1687944230477": 100,
> "1687944430477": 200
> }
> }
> ]
> }
> {code}
> #
> http://COLLECTOR_C2_HOST:6188/ws/v1/timeline/metrics?metricNames=cpu&appId=skywalking&hostname=hostXYZ
> API call returns
> {noformat}
> {
> "exception": "NullPointerException",
> "javaClassName": "java.lang.NullPointerException"
> }
> {noformat}
> In collector C2 log file following message is logged
> {code}
> 2023-06-28 09:40:24,592 ERROR
> org.apache.ambari.metrics.core.timeline.discovery.TimelineMetricMetadataManager:
> TimelineMetricMetadataKey is null for : [7, 73, 67, -94, 19, -102, 82, 114,
> 100, -66, -22, 79, -51, -107, -73, 64, -36, -72, -42, -103]
> 2023-06-28 09:40:24,594 WARN
> org.apache.hadoop.yarn.webapp.GenericExceptionHandler: INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
> at
> org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getLastTimelineMetricFromResultSet(PhoenixHBaseAccessor.java:457)
> at
> org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getLatestMetricRecords(PhoenixHBaseAccessor.java:1150)
> at
> org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getMetricRecords(PhoenixHBaseAccessor.java:966)
> at
> org.apache.ambari.metrics.core.timeline.HBaseTimelineMetricsService.getTimelineMetrics(HBaseTimelineMetricsService.java:294)
> at
> org.apache.ambari.metrics.webapp.TimelineWebServices.getTimelineMetrics(TimelineWebServices.java:267)
> {code}
> Same behaviour is there even after 5 minutes which is the default ambari
> metrics metadata sync interval.
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