felixzh created FLINK-38151:
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Summary: Class MetricFetcherImpl's method fetchMetrics failed log
level adjustment to error
Key: FLINK-38151
URL: https://issues.apache.org/jira/browse/FLINK-38151
Project: Flink
Issue Type: Improvement
Components: Runtime / Metrics, Runtime / REST
Affects Versions: 1.20.2, 1.19.3, 1.18.1, 1.17.2
Reporter: felixzh
Fix For: 1.20.3
Attachments: image-2025-07-29-10-41-35-778.png
when there is a jar conflict，the webUI keeps loading without any direct error
message in the log, but Flink job is running normally. This causing
significant obstacles to identifying problems during troubleshooting.
Strongly recommend adjusting the failed log level to ERROR!!
!image-2025-07-29-10-41-35-778.png!
Only debug log as follows:
DEBUG org.apache.flink.runtime.rest.handler.legacy.metrics.MetricFetcherImpl
[] - Failed to fetch the TaskManager's metrics.
java.util.concurrent.CompletionException:
java.util.concurrent.ExecutionException: Boxed Error
Caused by: java.lang.NoSuchMethodError:
org.apache.commons.math3.stat.descriptive.rank.Percentile.withNaNStrategy(Lorg/apache/commons/math3/stat/ranking/NaNStrategy;)Lorg/apache/commons/math3/stat/descriptive/rank/Percentile;
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