Possible issue?

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wbennett77

Regular Contributor
I have never seen the following in my log until this morning:

Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow
Jul 11 07:05:56 kernel: TCP: time wait bucket table overflow

Anything to be concerned about? It only appeared a few times over a couple of minutes and hasn't been seen in about 15 minutes.

Cheers!
 

RMerlin

Asuswrt-Merlin dev
It means a high number of TIME_WAIT state connections. Can happen in theory if you are being bombarded with connection attempts, or if you are using a client that establishes a lot of connections (think Bittorrent) and either the client has been closed (leaving to many remote peers trying to connect to you), or you are trying to connect to a lot of unreachable peers.

The Network Tools -> Netstat page might give you a hint.
 

fbreve

Regular Contributor
I just updated my Asus RT-AC68U to firmware 376.45 (Merlin build) and got lots of this error and none of my devices would see the Internet (even though the router still pings it):

Aug 22 14:35:22 kernel: net_ratelimit: 39 callbacks suppressed
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:22 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: net_ratelimit: 205 callbacks suppressed
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow
Aug 22 14:35:27 kernel: TCP: time wait bucket table overflow

So I went back to firmware 376.44 (Merlin build) and everything is back to normal.
 

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