Github user zhijiangW commented on a diff in the pull request: https://github.com/apache/flink/pull/5400#discussion_r165983496 --- Diff: flink-core/src/main/java/org/apache/flink/configuration/TaskManagerOptions.java --- @@ -184,6 +184,18 @@ key("taskmanager.network.detailed-metrics") .defaultValue(false); + /** + * Config parameter defining whether to spill data for channels with barrier or not in exactly-once + * mode based on credit-based flow control. + * + * @deprecated Will be removed for Flink 1.6 when the old code will be dropped in favour of + * credit-based flow control. + */ + @Deprecated + public static final ConfigOption<Boolean> EXACTLY_ONCE_BLOCKING_DATA_ENABLED = + key("taskmanager.exactly-once.blocking.data.enabled") + .defaultValue(false); --- End diff -- yes, the default value should be true, but I think it should be changed after the `FLINK-7456` is merged to make the credit-based work.
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