When writing to Amazon S3 destination why are these “WARN” messages showing up in the logs? Does this have any impact on the running pipeline?
No content length specified for stream data. Stream contents will be buffered in memory and could result in out of memory errors.
These messages are coming directly from the AWS client library code. Basically when streaming data to/from S3, they don't send a content-length header along with the payload; since it’s streaming mode.
Note that these are just warnings and not errors so this should not impact the running pipeline.
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