TCP session without 3-way handshake

[waldo kitty <wkitty42 () windstream net>]

running snort 2.9.4.1


i'm seeing a lot of

[129:20:1] TCP session without 3-way handshake

coming from connections wit Google and Yahoo... i do not see this on my 
connections but it is being seen on other's connections...

there's also a lot of

[119:19:1] (http_inspect) LONG HEADER
[120:3:1] (http_inspect) NO CONTENT-LENGTH OR TRANSFER-ENCODING IN HTTP RESPONSE
[120:8:1] (http_inspect) INVALID CONTENT-LENGTH OR CHUNK SIZE
[129:7:1] Limit on number of overlapping TCP packets reached
[129:12:1] Consecutive TCP small segments exceeding threshold
[129:15:1] Reset outside window

on the same connection from those same external sources...

how can this be?

could it be the result of dropped packets or something else?

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