Chesnay Schepler created FLINK-12642:
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Summary: 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
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}
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