Sometimes localhost connection to Bitcoin core fails

[Manfred Karrer]

Sometimes localhost connection to Bitcoin core (in regtest mode) fails with the first attempt using 127.0.0.1.
After a timeout and next attempt with the internal LAN address it succeeds.
I observed that with UPnP port mapping enabled and disabled in Bitcoin core.
I did not find any pattern yet to reproduce it but it happens from time to time.
We use still v 0.12, so don't know if it it happens with the latest code base.

16:56:38.564 [PeerGroup] INFO  org.bitcoinj.core.PeerGroup - Localhost peer detected, trying to use it instead of P2P discovery
16:56:38.581 [NioClientManager] INFO  org.bitcoinj.net.NioClientManager - Successfully connected to /127.0.0.1:18444
16:56:38.581 [NioClientManager] INFO  org.bitcoinj.core.Peer - Announcing to /127.0.0.1:18444 as: /bitcoinj:0.12/Bitsquare-localhost:0.1/
16:56:43.579 [AbstractTimeoutHandler timeouts] INFO  org.bitcoinj.core.PeerSocketHandler - [127.0.0.1]:18444: Timed out
16:56:43.581 [AbstractTimeoutHandler timeouts] INFO  org.bitcoinj.core.PeerGroup - [127.0.0.1]:18444: Peer died
16:56:43.581 [PeerGroup] INFO  org.bitcoinj.core.PeerGroup - Waiting 1000 msec before next connect attempt to [192.168.1.33]:18444
16:56:44.583 [NioClientManager] INFO  org.bitcoinj.net.NioClientManager - Successfully connected to Manfreds-iMac.local/192.168.1.33:18444

[Mike Hearn]

I don't recall seeing that, but I guess the issue is likely to be on the bitcoinj side unless your machine is heavily loaded. Would need some debugging session to find out.

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[Andreas Schildbach]

Actually I see this a lot in users logs.

Also in my own sometimes. When this happens, for some minutes bitcoinj
times out all connections to peers. At the same time, I can browse the
internet on the same phone.

Several minutes after the spooking is over and connections are possible
again.

On 11/11/2014 06:12 PM, Mike Hearn wrote:
> I don't recall seeing that, but I guess the issue is likely to be on the
> bitcoinj side unless your machine is heavily loaded. Would need some
> debugging session to find out.
>
> On Tue, Nov 11, 2014 at 5:08 PM, Manfred Karrer
> <manfred...@gmail.com <mailto:manfred...@gmail.com>> wrote:
>
> Sometimes localhost connection to Bitcoin core (in regtest mode)
> fails with the first attempt using 127.0.0.1.
> After a timeout and next attempt with the internal LAN address it
> succeeds.
> I observed that with UPnP port mapping enabled and disabled in
> Bitcoin core.
> I did not find any pattern yet to reproduce it but it happens from
> time to time.
> We use still v 0.12, so don't know if it it happens with the latest
> code base.
>
> 16:56:38.564 [PeerGroup] INFO org.bitcoinj.core.PeerGroup -
> Localhost peer detected, trying to use it instead of P2P discovery
> 16:56:38.581 [NioClientManager] INFO
> org.bitcoinj.net.NioClientManager - Successfully connected to

> /127.0.0.1:18444 <http://127.0.0.1:18444>

> 16:56:38.581 [NioClientManager] INFO org.bitcoinj.core.Peer -

> Announcing to /127.0.0.1:18444 <http://127.0.0.1:18444> as:

> /bitcoinj:0.12/Bitsquare-localhost:0.1/
> 16:56:43.579 [AbstractTimeoutHandler timeouts] INFO
> org.bitcoinj.core.PeerSocketHandler - [127.0.0.1]:18444: Timed out
> 16:56:43.581 [AbstractTimeoutHandler timeouts] INFO
> org.bitcoinj.core.PeerGroup - [127.0.0.1]:18444: Peer died
> 16:56:43.581 [PeerGroup] INFO org.bitcoinj.core.PeerGroup - Waiting
> 1000 msec before next connect attempt to [192.168.1.33]:18444
> 16:56:44.583 [NioClientManager] INFO
> org.bitcoinj.net.NioClientManager - Successfully connected to

> Manfreds-iMac.local/192.168.1.33:18444 <http://192.168.1.33:18444>

>
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