[GitHub] flink pull request #4928: [FLINK-7732][kafka-consumer] Do not commit to kafk...

[pnowojski]

Github user pnowojski commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4928#discussion_r148221257
  
    --- Diff: 
flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaTopicPartitionStateSentinel.java
 ---
    @@ -52,4 +52,7 @@
         */
        public static final long GROUP_OFFSET = -915623761773L;
     
    +   public static boolean isSentinel(long offset) {
    +           return offset < 0;
    --- End diff --
    
    Kafka doesn't allow to commit any negative values 


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