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Chesnay Schepler edited comment on FLINK-12642 at 5/28/19 8:08 AM: ------------------------------------------------------------------- [~zjwang] [~azagrebin] was (Author: zentol): [~zjwang][~azagrebin] > OutputBufferPoolUsageGauge can fail with NPE > -------------------------------------------- > > Key: FLINK-12642 > URL: https://issues.apache.org/jira/browse/FLINK-12642 > Project: Flink > Issue Type: Bug > Components: Runtime / Metrics, Runtime / Network > Affects Versions: 1.9.0 > Reporter: Chesnay Schepler > Priority: Critical > Fix For: 1.9.0 > > > The result partition metrics are initialized before > {{ResultPartitiion#setup}} was called. If a reporter tries to access a > {{OutputBufferPoolUsageGauge}} in between it will fail with an NPE since the > bufferpool of the partition is still null. > {code} > 2019-05-27 14:49:47,031 WARN > org.apache.flink.runtime.metrics.MetricRegistryImpl - Error while > reporting metrics > java.lang.NullPointerException > at > org.apache.flink.runtime.io.network.metrics.OutputBufferPoolUsageGauge.getValue(OutputBufferPoolUsageGauge.java:41) > at > org.apache.flink.runtime.io.network.metrics.OutputBufferPoolUsageGauge.getValue(OutputBufferPoolUsageGauge.java:27) > at > org.apache.flink.metrics.slf4j.Slf4jReporter.tryReport(Slf4jReporter.java:114) > at > org.apache.flink.metrics.slf4j.Slf4jReporter.report(Slf4jReporter.java:80) > at > org.apache.flink.runtime.metrics.MetricRegistryImpl$ReporterTask.run(MetricRegistryImpl.java:436) > at > java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) > at > java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) > at > java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:300) > at > java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) > at > java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) > at java.base/java.lang.Thread.run(Thread.java:844) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)