Hi Stephan et al.I changed ulimit -n at all servers: Flink & Kafka to 10000 &
16000 respectively.Rebooted. Retried. Failed the same.Then restarted everything
from the scratch with disk clean up etc.Started fine & no more Timeout due to
not being able to fetch the topic metadata.All that started when I increased
the deg of parallelism & created a Kafka topic with that number for partitions:
2048.Its running now. Am hoping to get better perf due to increasing deg
paralleism.Have a great weekend & Appreciate your feedback...Amir-
From: amir bahmanyari <[email protected]>
To: "[email protected]" <[email protected]>
Sent: Friday, September 30, 2016 2:36 PM
Subject: Re: KafkaIO() Timeout expired while fetching kafka topic metadata
Hi Stephan,yes, this program uses Beam's KafkaIO().
PCollection<KV<String, String>> kafkarecords = p
.apply(KafkaIO.read().withBootstrapServers("kafka01:9092").withTopics(topics)
.withValueCoder(StringUtf8Coder.of()).withoutMetadata()) .apply("startBundle",
ParDo.of( new DoFn<KV<byte[], String>, KV<String, String>>() {
Thanks+regards,Amir-
From: Stephan Ewen <[email protected]>
To: [email protected]; amir bahmanyari <[email protected]>
Sent: Friday, September 30, 2016 2:13 PM
Subject: Re: KafkaIO() Timeout expired while fetching kafka topic metadata
Not sure if this is caused by the Flink Kafka Consumer (or if this program uses
Beam's Kafka IO).
If it is using Flink, there is a requirement that the client that submits the
job can access Kafka. If it cannot, that may be a cause for such a timeout.
On Fri, Sep 30, 2016 at 7:11 PM, amir bahmanyari <[email protected]> wrote:
No more stack trace Raghu.Keeping the configs like I described, yes it fails
like this since for some reason the Kafka Zookeeper gets killed.Thanks
+regardsAmir-
From: Raghu Angadi <[email protected]>
To: [email protected] ; amir bahmanyari <[email protected]>
Sent: Thursday, September 29, 2016 11:28 PM
Subject: Re: KafkaIO() Timeout expired while fetching kafka topic metadata
On Thu, Sep 29, 2016 at 9:34 PM, amir bahmanyari <[email protected]> wrote:
at org.apache.flink.client. CliFrontend.parseParameters(
CliFrontend.java:1189) at org.apache.flink.client.
CliFrontend.main(CliFrontend. java:1239)Caused by: org.apache.kafka.common.
errors.TimeoutException: Timeout expired while fetching topic metadata
Is there any more stacktrace printed after this line?
Does it always fail?
