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William Austin commented on KAFKA-6252: --------------------------------------- [~rhauch] are there any workarounds for this issue until it is changed? > A metric named 'XX' already exists, can't register another one. > --------------------------------------------------------------- > > Key: KAFKA-6252 > URL: https://issues.apache.org/jira/browse/KAFKA-6252 > Project: Kafka > Issue Type: Bug > Components: KafkaConnect > Affects Versions: 1.0.0 > Environment: Linux > Reporter: Alexis Sellier > Priority: Critical > > When a connector crashes (or is not implemented correctly by not > stopping/interrupting {{poll()}}), It cannot be restarted and an exception > like this is thrown > {code:java} > java.lang.IllegalArgumentException: A metric named 'MetricName > [name=offset-commit-max-time-ms, group=connector-task-metrics, > description=The maximum time in milliseconds taken by this task to commit > offsets., tags={connector=hdfs-sink-connector-recover, task=0}]' already > exists, can't register another one. > at > org.apache.kafka.common.metrics.Metrics.registerMetric(Metrics.java:532) > at org.apache.kafka.common.metrics.Sensor.add(Sensor.java:256) > at org.apache.kafka.common.metrics.Sensor.add(Sensor.java:241) > at > org.apache.kafka.connect.runtime.WorkerTask$TaskMetricsGroup.<init>(WorkerTask.java:328) > at > org.apache.kafka.connect.runtime.WorkerTask.<init>(WorkerTask.java:69) > at > org.apache.kafka.connect.runtime.WorkerSinkTask.<init>(WorkerSinkTask.java:98) > at > org.apache.kafka.connect.runtime.Worker.buildWorkerTask(Worker.java:449) > at org.apache.kafka.connect.runtime.Worker.startTask(Worker.java:404) > at > org.apache.kafka.connect.runtime.distributed.DistributedHerder.startTask(DistributedHerder.java:852) > at > org.apache.kafka.connect.runtime.distributed.DistributedHerder.access$1600(DistributedHerder.java:108) > at > org.apache.kafka.connect.runtime.distributed.DistributedHerder$13.call(DistributedHerder.java:866) > at > org.apache.kafka.connect.runtime.distributed.DistributedHerder$13.call(DistributedHerder.java:862) > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > at java.lang.Thread.run(Thread.java:745) > {code} > I guess it's because the function taskMetricsGroup.close is not call in all > the cases -- This message was sent by Atlassian JIRA (v6.4.14#64029)