Re: Kafka exceptions in Flink log file

2018-04-05 Thread Alexander Smirnov
Hi Timo, it is the latest released version - 1.4.2 This only happens when a job falls into a restart loop and stays in it for 20 minutes or so. Looks like for each restart, Flink loads classes anew, but previously loaded classes are not garbage collected for some reason (still referenced?) Very

Re: Kafka exceptions in Flink log file

2018-04-03 Thread Timo Walther
Hi Alex, which version of Flink are you running? There were some class loading issues with Kafka recently. I would try it with the newest Flink version. Otherwise ClassNotFoundException usually indicates that something is wrong with your dependencies. Maybe you can share your pom.xml with

Kafka exceptions in Flink log file

2018-04-02 Thread Alexander Smirnov
I see a lot of messages in flink log like below. What's the cause? 02 Apr 2018 04:09:13,554 ERROR org.apache.kafka.clients.producer.internals.Sender - Uncaught error in kafka producer I/O thread: org.apache.kafka.common.KafkaException: Error registering mbean