lot of ERROR messages on HF

Splunk Enterprise

Hi,

my env is like - UF->HF->IDX Cluster

I have many errors on my HF that it can't received the data

some are like:
"ERROR TcpInputProc - Message rejected. Received unexpected message of size=369295616 bytes from src=xxxx:xxxx in streaming mode. Maximum message size allowed=67108864. (::) Possible invalid source sending data to splunktcp port or valid source sending unsupported payload."

and some are like
"ERROR TcpInputProc - Encountered Streaming S2S error = Received reference to unknown channel_code=1 for data received from src=xxx:xxx"

any help?

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