zeliu commented on PR #19706:
URL: https://github.com/apache/flink/pull/19706#issuecomment-1124823145
@MartijnVisser Thanks for your reply, but if the number of arguments less
than 5, it will throw exceptions.
In org.apache.flink.streaming.kafka.test.KafkaExample ,I provided 4
parameters, and it will report an #error.
```
if (parameterTool.getNumberOfParameters() < 5) {
System.out.println(
"Missing parameters!\n"
+ "Usage: Kafka --input-topic <topic>
--output-topic <topic> "
+ "--bootstrap.servers <kafka brokers> "
+ "--group.id <some id>");
throw new Exception(
"Missing parameters!\n"
+ "Usage: Kafka --input-topic <topic>
--output-topic <topic> "
+ "--bootstrap.servers <kafka brokers> "
+ "--group.id <some id>");
}
```
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