receiver/kafka: error handling fixes #413
Merged
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Two changes for issue #412.
receiver/kafka: fix kafka connection leaks when it fails to consume partition
Clients and consumers are not closed when consumer.ConsumePartition failed, which creates a resource leaks. If the error is sticky due to bad offset saved in state file, the receiver would keep creating new consumer connections and not closing them.
This commit fixes the issue, by making sure the connections and consumers are closed if there is errors when trying to consume a partition.
At the same time, if an sarama.ErrOffsetOutOfRange error is returned, it would just falls back to oldest offset, instead of keep retrying.
moves time.NewTicker out of for loop