Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/4088#discussion_r122929197 --- Diff: flink-core/src/main/java/org/apache/flink/api/common/io/DelimitedInputFormat.java --- @@ -246,6 +246,9 @@ public void setDelimiter(String delimiter) { throw new IllegalArgumentException("Delimiter must not be null"); } this.delimiter = delimiter.getBytes(getCharset()); + if (this.bufferSize > 0 && this.delimiter.length >= this.bufferSize) { --- End diff -- since the initial value for `bufferSize` is `-1` doesn't this mean that the delimiter can never be set without calling `setBufferSize`? Would it make sense to move this check into `open()`?
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