Xeli commented on issue #6594: [FLINK-9311] [pubsub] Added PubSub source connector with support for checkpointing (ATLEAST_ONCE) URL: https://github.com/apache/flink/pull/6594#issuecomment-488235510 Hi @haf The connector will acknowledge messages on every successful checkpoint. How often do you checkpoint? What might happen is that for some reason messages are not acknowledged fast enough. Could you also show how you create the PubSubSource? So what configuration you've used.
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