David Jacot created KAFKA-13312:
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Summary: 'NetworkDegradeTest#test_rate' should wait until iperf
server is listening
Key: KAFKA-13312
URL: https://issues.apache.org/jira/browse/KAFKA-13312
Project: Kafka
Issue Type: Bug
Reporter: David Jacot
Assignee: David Jacot
We have seen multiple failures with the following logs:
{noformat}
[DEBUG - 2021-09-17 09:57:58,603 - remoteaccount - _log - lineno:160]:
ubuntu@worker26: Running ssh command: iperf -i 1 -t 20 -f k -c worker25 [INFO -
2021-09-17 09:57:58,611 - network_degrade_test - test_rate - lineno:114]: iperf
output connect failed: Connection refused
{noformat}
The iperf client can not connect to the iperf server. The test launches the
server and then immediately launches the client but there is not guarantee that
the server listens when the client is started.
It seems that we should add a condition to wait until the server prints `Server
listening` before starting the client.
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