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https://issues.apache.org/jira/browse/KAFKA-7529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16661078#comment-16661078
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Sönke Liebau commented on KAFKA-7529:
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Hi [~kivaturi], I am fairly certain that there should not be a "normal"
situation where this happens. However as this ticket stands there is a very
limited amount of information to work with, nothing comes immediately to mind.
Some things you could look at / try are:
* Anything in the Connect logs?
* enable trace logging for the connector, every time it is polled you should
at least see "Polling for new data" - anything after that will give a better
idea of what is happening
* Check the offsets topic (Robin explains how to do this
[here|https://gist.github.com/rmoff/063e878f4ff0c0f8c09e9d8d15262c10] - I don't
expect that you see anything here, but every bit of information help
> Kafka Connect JDBC doesn't push new records to Kafka Topic unless the
> connector is restarted
> --------------------------------------------------------------------------------------------
>
> Key: KAFKA-7529
> URL: https://issues.apache.org/jira/browse/KAFKA-7529
> Project: Kafka
> Issue Type: Task
> Components: KafkaConnect
> Reporter: Kashyap Ivaturi
> Priority: Major
>
> Hi,
> We have a Kafka Connect JDBC Source Connector which keeps polling for new
> records in a Oracle table every minute and push the new records to Kafka
> Topic. New records are determined by an incrementing column.
> In general everything works well but once in a while we see that even though
> there were new records with incrementing column those records doesn't get
> pushed to the Topic. There is no clue of any error in the logs and the
> connector is in running state. Only after we restart the Connector the new
> records are pushed to the Topic.
> Any idea in what situation can this happen?.
> Rgds
> Kashyap.
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