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https://issues.apache.org/jira/browse/KAFKA-8258?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu updated KAFKA-8258:
--------------------------------
    Description: 
We noticed that the Spark's Kafka connector outputs a lot of following verbose 
logs:
{code:java}
19/04/18 04:31:06 INFO Fetcher: [Consumer clientId=consumer-2, groupId=...] 
Resetting offset for partition ... to offset .... 
{code}
It comes from 
[https://github.com/hachikuji/kafka/blob/76c796ca128c3c97231f3ebda994a07bb06b26aa/clients/src/main/java/org/apache/kafka/clients/consumer/internals/Fetcher.java#L567]

This log was added in [https://github.com/apache/kafka/pull/4557]

In Spark, we use `seekToEnd` to discover latest offsets of a topic. If there 
are thousands of partitions in this topic, it will output thousands of INFO 
logs every call

Is it intentional? If not, can we change it to DEBUG?

  was:
We noticed that the Spark's Kafka connector outputs a lot of following verbose 
logs:
{code}
19/04/18 04:31:06 INFO Fetcher: [Consumer clientId=consumer-2, groupId=...] 
Resetting offset for partition ... to offset .... 
{code}

It comes from 
https://github.com/hachikuji/kafka/blob/76c796ca128c3c97231f3ebda994a07bb06b26aa/clients/src/main/java/org/apache/kafka/clients/consumer/internals/Fetcher.java#L567

This log was added in https://github.com/apache/kafka/pull/4557

In Spark, we use `seekToEnd` to discover latest offsets of a topic. If there 
are thousands of partitions in this topic, it will output thousands of INFO 
logs.

Is it intentional? If not, can we change it to DEBUG?


> Verbose logs in org.apache.kafka.clients.consumer.internals.Fetcher
> -------------------------------------------------------------------
>
>                 Key: KAFKA-8258
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8258
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Shixiong Zhu
>            Priority: Major
>
> We noticed that the Spark's Kafka connector outputs a lot of following 
> verbose logs:
> {code:java}
> 19/04/18 04:31:06 INFO Fetcher: [Consumer clientId=consumer-2, groupId=...] 
> Resetting offset for partition ... to offset .... 
> {code}
> It comes from 
> [https://github.com/hachikuji/kafka/blob/76c796ca128c3c97231f3ebda994a07bb06b26aa/clients/src/main/java/org/apache/kafka/clients/consumer/internals/Fetcher.java#L567]
> This log was added in [https://github.com/apache/kafka/pull/4557]
> In Spark, we use `seekToEnd` to discover latest offsets of a topic. If there 
> are thousands of partitions in this topic, it will output thousands of INFO 
> logs every call
> Is it intentional? If not, can we change it to DEBUG?



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