Alexander Koval created KAFKA-6466:
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Summary: Kafka connect task sometimes fails on start-up
Key: KAFKA-6466
URL: https://issues.apache.org/jira/browse/KAFKA-6466
Project: Kafka
Issue Type: Bug
Components: KafkaConnect
Affects Versions: 1.0.0
Reporter: Alexander Koval
We use kafka connect for indexing into Elasticsearch. Sometimes when we
updating our kafka-connect application one or several tasks get {{FAILED}}
status. Restarting connector with failed task usually helps.
Below is an example of the failed task's stacktrace:
{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=prom-ua-catalog-product, task=2}]' 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$13.call(DistributedHerder.java:862)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748){code}
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