Hi John, As you suggested, I would also lean towards increasing the number of allowed open handles, but for recommendation on best practices, I am cc'ing Piotr who may be more familiar with the Kafka consumer.
Cheers, Kostas On Tue, Feb 11, 2020 at 9:43 PM John Smith <java.dev....@gmail.com> wrote: > > Just wondering is this on the client side in the flink Job? I rebooted the > task and the job deployed correctly on another node. > > Is there a specific ulimit that we should set for flink tasks nodes? > > org.apache.kafka.common.KafkaException: Failed to construct kafka consumer > at > org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:799) > at > org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:650) > at > org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:630) > at > org.apache.flink.streaming.connectors.kafka.internal.KafkaPartitionDiscoverer.initializeConnections(KafkaPartitionDiscoverer.java:58) > at > org.apache.flink.streaming.connectors.kafka.internals.AbstractPartitionDiscoverer.open(AbstractPartitionDiscoverer.java:94) > at > org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.open(FlinkKafkaConsumerBase.java:504) > at > org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36) > at > org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:102) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:424) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:290) > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711) > at java.lang.Thread.run(Thread.java:748) > Caused by: org.apache.kafka.common.KafkaException: java.io.IOException: Too > many open files > at org.apache.kafka.common.network.Selector.<init>(Selector.java:154) > at org.apache.kafka.common.network.Selector.<init>(Selector.java:188) > at org.apache.kafka.common.network.Selector.<init>(Selector.java:192) > at > org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:722) > ... 11 more > Caused by: java.io.IOException: Too many open files > at sun.nio.ch.IOUtil.makePipe(Native Method) > at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65) > at > sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36) > at java.nio.channels.Selector.open(Selector.java:227) > at org.apache.kafka.common.network.Selector.<init>(Selector.java:152) > ... 14 more
