Investigate why TestHTTPSuite/TestMapStreamUDFunctionAndSink always fails for Redis

[whynowy]

Describe the bug

=== RUN TestHTTPSuite/TestMapStreamUDFunctionAndSink
sdks_test.go:67: Creating Pipeline flatmap-stream
Watching POD: flatmap-stream-in-0-kmvdr
sdks_test.go:73: Expected vertex "in" pod contains "Start processing source messages"
Watching POD: flatmap-stream-go-split-0-xesoc
sdks_test.go:74: Expected vertex "go-split" pod contains "Start processing udf messages"
Watching POD: flatmap-stream-go-udsink-0-moqit
sdks_test.go:75: Expected vertex "go-udsink" pod contains "Start processing sink messages"
Watching POD: flatmap-stream-python-split-0-u9boy
sdks_test.go:76: Expected vertex "python-split" pod contains "Start processing udf messages"
Watching POD: flatmap-stream-python-udsink-0-v7su2
sdks_test.go:77: Expected vertex "python-udsink" pod contains "Start processing sink messages"
Handling connection for 8378
Watching POD: flatmap-stream-go-udsink-0-moqit
sdks_test.go:83: Expected vertex ["go-udsink"] pod log to contain ["hello"] but didn't.

To Reproduce
Steps to reproduce the behavior:

1. ....
2. ....
3. ....

Expected behavior
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Screenshots
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Environment (please complete the following information):

• Kubernetes: [e.g. v1.18.6]
• Numaflow: [e.g. v0.5.1]

Additional context
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