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https://issues.apache.org/jira/browse/ATLAS-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436927#comment-15436927
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Manikumar Reddy commented on ATLAS-1131:
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Kafka Producer logs these warn messages, when it is not able to fetch topic
metadata.
The reasons for this are unavailability of Topic metadata/Leader/Topic not
existing etc.
Kafka default settings should be fine for production deployments. Also the warn
messages
should not be a problem on a healthy cluster. Kafka producer metadata fetch
logic is complex
and difficult to bring any changes.
During integration/unit tests, If we want to reduce the the log volume, then we
can decrease
the max.block.ms to 30 and increase retry-backoff-ms to 1000.
> Atlas hooks produce excess Kafka logs if Kafka topic is not created already
> ---------------------------------------------------------------------------
>
> Key: ATLAS-1131
> URL: https://issues.apache.org/jira/browse/ATLAS-1131
> Project: Atlas
> Issue Type: Bug
> Reporter: Vimal Sharma
> Assignee: Vimal Sharma
> Attachments: ATLAS-1131.patch
>
>
> Hooks for Atlas publish messages to a Kafka topic named ATLAS_HOOK. If this
> topic is not present and Atlas does not have permission to create this topic,
> Kafka produces excessive logs as below (example in /tmp/hive/hive.log).
> 2016-08-22 06:43:47,655 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1177 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:47,756 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1178 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:47,858 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1179 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:47,961 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1180 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:48,062 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1181 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:48,165 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1182 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:48,265 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1183 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:48,366 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1184 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
> 2016-08-22 06:43:48,467 WARN [kafka-producer-network-thread | producer-1]:
> clients.NetworkClient (NetworkClient.java:handleResponse(600)) - Error while
> fetching metadata with correlation id 1185 :
> {ATLAS_HOOK=UNKNOWN_TOPIC_OR_PARTITION}
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