A wrapped Kafka metric was accessing state of the consumer while said
state was modified.
As far as I can tell this is a Kafka issue and there's nothing we can do.
Unless this happens frequently it should be safe to ignore it.
On 20.03.2018 15:02, PedroMrChaves wrote:
Hello,
I have the following error while trying to report metrics to influxdb using
the DropwizardReporter.
2018-03-20 13:51:00,288 WARN
org.apache.flink.runtime.metrics.MetricRegistryImpl - Error while
reporting metrics
java.util.ConcurrentModificationException
at
java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
at
java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742)
at java.util.AbstractCollection.addAll(AbstractCollection.java:343)
at java.util.HashSet.<init>(HashSet.java:120)
at
org.apache.kafka.common.internals.PartitionStates.partitionSet(PartitionStates.java:65)
at
org.apache.kafka.clients.consumer.internals.SubscriptionState.assignedPartitions(SubscriptionState.java:298)
at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator$ConsumerCoordinatorMetrics$1.measure(ConsumerCoordinator.java:906)
at
org.apache.kafka.common.metrics.KafkaMetric.value(KafkaMetric.java:61)
at
org.apache.kafka.common.metrics.KafkaMetric.value(KafkaMetric.java:52)
at
org.apache.flink.streaming.connectors.kafka.internals.metrics.KafkaMetricWrapper.getValue(KafkaMetricWrapper.java:35)
at
org.apache.flink.streaming.connectors.kafka.internals.metrics.KafkaMetricWrapper.getValue(KafkaMetricWrapper.java:26)
at
org.apache.flink.dropwizard.metrics.FlinkGaugeWrapper.getValue(FlinkGaugeWrapper.java:36)
at
metrics_influxdb.measurements.MeasurementReporter.fromGauge(MeasurementReporter.java:163)
at
metrics_influxdb.measurements.MeasurementReporter.report(MeasurementReporter.java:55)
at
org.apache.flink.dropwizard.ScheduledDropwizardReporter.report(ScheduledDropwizardReporter.java:231)
at
org.apache.flink.runtime.metrics.MetricRegistryImpl$ReporterTask.run(MetricRegistryImpl.java:417)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
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)
Any ideas on what might be the problem?
-----
Best Regards,
Pedro Chaves
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