Sumit Agrawal created HDDS-7349:
-----------------------------------
Summary: Flaky integration test have memory leak for
RatisDropwizardExports
Key: HDDS-7349
URL: https://issues.apache.org/jira/browse/HDDS-7349
Project: Apache Ozone
Issue Type: Bug
Reporter: Sumit Agrawal
Memory leak observed in flaky integration test causing OutOfMemory multiple
times, and causing the cancel of the case.
1. registeration of RatisDropwizardExports is done multiple time, even its
registered.
-- This is called by Ratis CopyOnWrite when another metrics get registered.
-- Since the track of above object is lost, no way to cleanup later
------------------stack showing registeration-----------
at
io.prometheus.client.CollectorRegistry.register(Lio/prometheus/client/Collector;)V
(CollectorRegistry.java:60)
at
org.apache.hadoop.hdds.server.http.RatisDropwizardExports.registerDropwizard(Lorg/apache/ratis/metrics/RatisMetricRegistry;Ljava/util/Map;)V
(RatisDropwizardExports.java:75)
at
org.apache.hadoop.hdds.server.http.RatisDropwizardExports.lambda$registerRatisMetricReporters$0(Ljava/util/Map;Lorg/apache/ratis/metrics/RatisMetricRegistry;)V
(RatisDropwizardExports.java:53)
at
org.apache.hadoop.hdds.server.http.RatisDropwizardExports$$Lambda$384.accept(Ljava/lang/Object;)V
(Unknown Source)
at
org.apache.ratis.metrics.impl.MetricRegistriesImpl.lambda$null$0(Lorg/apache/ratis/metrics/RatisMetricRegistry;Ljava/util/function/Consumer;)V
(MetricRegistriesImpl.java:72)
at
org.apache.ratis.metrics.impl.MetricRegistriesImpl$$Lambda$618.accept(Ljava/lang/Object;)V
(Unknown Source)
at
java.util.concurrent.CopyOnWriteArrayList.forEach(Ljava/util/function/Consumer;)V
(CopyOnWriteArrayList.java:895)
at
org.apache.ratis.metrics.impl.MetricRegistriesImpl.lambda$create$1(Lorg/apache/ratis/metrics/MetricRegistryInfo;)Lorg/apache/ratis/metrics/RatisMetricRegistry;
(MetricRegistriesImpl.java:72)
------------------------------------
2. after stop of Datanode, still ratis registeration going on causing to get
accumulated.
This is observed that Datanode is stopped, but still Datanode having
"ratisMetricsMap" having new metrics registered.
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