[KAFKA-10565] Console producer displays interactive prompt even when input is not interactive

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0
• Component/s: tools
• Assignee: Tom Bentley
• Reporter: Sergei Morozov
• Created: 01/Oct/20 23:05
• Updated: 26/Nov/20 03:57
• Resolved: 26/Nov/20 03:57

Description

The prompt introduced in KAFKA-2955 may be indeed helpful when a user enters messages manually but when the messages are read from a file, it's not helpful and may be really annoying.

Steps to reproduce

1. Create a file with a decent number of messages (e.g. 80,000 in my case)
2. Start console producer and forward the file contents to its STDIN:

$ kafka-console-producer --broker-list b1,b2,b3 --topic test < messages.txt
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ... >>>>>>>>>>>>>>

For each message the producer reads from the file, there's one > displayed polluting the output.

Expected behavior:

1. If the producer can detect that the input stream is a TTY, it should not display the prompt.
2. Ideally, there should be a configuration parameter to disable this explicitly.

 

Issue Links

• is caused by: KAFKA-2955 Add Prompt to kafka-console-producer
• links to: GitHub Pull Request #9644