Sxnan commented on a change in pull request #11151: [FLINK-16128][docs]Translate "Google Cloud PubSub" page into Chinese URL: https://github.com/apache/flink/pull/11151#discussion_r383667086
########## File path: docs/dev/connectors/pubsub.md ########## @@ -143,13 +143,13 @@ env.addSource(pubsubSource) </div> </div> -### Atleast once guarantee +### At least once guarantee #### SourceFunction There are several reasons why a message might be send multiple times, such as failure scenarios on Google PubSub's side. -Another reason is when the acknowledgement deadline has passed. This is the time between receiving the message and between acknowledging the message. The PubSubSource will only acknowledge a message on successful checkpoints to guarantee Atleast-Once. This does mean if the time between successful checkpoints is larger than the acknowledgment deadline of your subscription messages will most likely be processed multiple times. +Another reason is when the acknowledgement deadline has passed. This is the time between receiving the message and between acknowledging the message. The PubSubSource will only acknowledge a message on successful checkpoints to guarantee at-least-Once. This does mean if the time between successful checkpoints is larger than the acknowledgment deadline of your subscription messages will most likely be processed multiple times. Review comment: nice catch! ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
