git-annex/doc/bugs/Local_pairing_fails:_received_PairMsg_loop.mdwn
Joey Hess 7e7e765cba Improve local pairing behavior when two computers both try to start the pairing process separately.
I was able to reproduce something very like this bug by starting
pairing separately on both computers under poor network conditions (ie,
weak wifi on my front porch). Neither computer showed an alert for the
PairReq messages it was seeing (intermittently) from the other.

So, I've made a new PairReq message that has not been seen before
always make the alert pop up, even if the assistant thinks it is
in the middle of its own pairing process (or even another pairing
process with a different box on the LAN).

(This shouldn't cause a rogue PairAck to disrupt a pairing process part
way through.)
2013-11-02 15:10:29 -04:00

39 lines
6.5 KiB
Markdown

### Please describe the problem.
Pairing over my local network doesn't work. The pairing process never finishes. The log shows that the same PairMsg messages are repeated endlessly.
### What steps will reproduce the problem?
### What version of git-annex are you using? On what operating system?
I'm on Ubuntu Raring 13.04. I installed git-annex 4.20131024 from the Precise PPA. It is working fine with a remote ssh repo, just not local pairing.
### Please provide any additional information below.
[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
[2013-11-01 16:55:21 CDT] main: Pairing in progress
[2013-11-01 16:55:55 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"Onyx\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBT0Y6TTzTg8nWwonmgUPPwJmPIaJzfEoJl8DbuylpgXqGCQ4doJXuvBODHIehPfyMr1xCWqNlNNLkcWg/a/eHFceyt3IlcD9XaZ1aKPzPmpjYKKf5amiYd6mAssw8zFaZUvwaXkNuHZpXVZyg6C6TkT6kdfln+6fOJZpSGQzksy0jka/Rzx0KXjsp3oqO4tQJbC7AX0nvmD0zvLtyCURzfGV+n2IqQxpPf2nP75Evt8jamcuqm6pWoe+hj9zjGytIXpSKe35wzRwUAUrjgmZ9NweuWfi2uMPJlDv8/n+Q3HyjygA+GzixBGuYXDt1CD8ISZvuoygS+9+jeY9uYH8b me@Onyx\\n\", pairUUID = UUID \"834b4f39-ca66-4baf-9323-57ef7058d7d0\"},IPv4Addr 2281744576), verifiableDigest = \"8d5d380542f7377f09a4584a38b0dbcea9ea215c\"})"
[2013-11-01 16:55:56 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"kubbie\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvBEWT+AiAmehOFyTQWlSdwDs7DDbkw7rfZ4W/IeG5awZjMgT5BefIv9cmar8vGIIEFMZLpf8cL3xIargDz0xE2wuqj5CLkdz+DKp5f2FGs11Ax/62DZr+eCiVtPnwijFw0Cz0wMRzkN93uedrvzP/KkNRcczgWh3aZqn8WxlkCia1fyykm/pP3W80MNkiJYX5vXpu1NCV5KLu+UXQzKhM2njOauJ3W5wsMvSl8faZIpEmKVCD3BMDDruxTIxggA3kt9GCGvIbPawy+fGOpp/j6pHqnX3GB2kkT47RIZKYEv99HuLyvea+oY5R11FsC2yYY3ujIdUU0fXnV8pvrqSv me@kubbie\\n\", pairUUID = UUID \"fd6a6858-76c9-4eea-b733-9359c7313e72\"},IPv4Addr 1879091392), verifiableDigest = \"cbd8197c3d78c8c68bb30f63aa974cd88dd0fb13\"})"
[2013-11-01 16:55:57 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"Onyx\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBT0Y6TTzTg8nWwonmgUPPwJmPIaJzfEoJl8DbuylpgXqGCQ4doJXuvBODHIehPfyMr1xCWqNlNNLkcWg/a/eHFceyt3IlcD9XaZ1aKPzPmpjYKKf5amiYd6mAssw8zFaZUvwaXkNuHZpXVZyg6C6TkT6kdfln+6fOJZpSGQzksy0jka/Rzx0KXjsp3oqO4tQJbC7AX0nvmD0zvLtyCURzfGV+n2IqQxpPf2nP75Evt8jamcuqm6pWoe+hj9zjGytIXpSKe35wzRwUAUrjgmZ9NweuWfi2uMPJlDv8/n+Q3HyjygA+GzixBGuYXDt1CD8ISZvuoygS+9+jeY9uYH8b me@Onyx\\n\", pairUUID = UUID \"834b4f39-ca66-4baf-9323-57ef7058d7d0\"},IPv4Addr 2281744576), verifiableDigest = \"8d5d380542f7377f09a4584a38b0dbcea9ea215c\"})"
[2013-11-01 16:55:58 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"kubbie\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvBEWT+AiAmehOFyTQWlSdwDs7DDbkw7rfZ4W/IeG5awZjMgT5BefIv9cmar8vGIIEFMZLpf8cL3xIargDz0xE2wuqj5CLkdz+DKp5f2FGs11Ax/62DZr+eCiVtPnwijFw0Cz0wMRzkN93uedrvzP/KkNRcczgWh3aZqn8WxlkCia1fyykm/pP3W80MNkiJYX5vXpu1NCV5KLu+UXQzKhM2njOauJ3W5wsMvSl8faZIpEmKVCD3BMDDruxTIxggA3kt9GCGvIbPawy+fGOpp/j6pHqnX3GB2kkT47RIZKYEv99HuLyvea+oY5R11FsC2yYY3ujIdUU0fXnV8pvrqSv me@kubbie\\n\", pairUUID = UUID \"fd6a6858-76c9-4eea-b733-9359c7313e72\"},IPv4Addr 1879091392), verifiableDigest = \"cbd8197c3d78c8c68bb30f63aa974cd88dd0fb13\"})"
[2013-11-01 16:55:59 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"Onyx\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBT0Y6TTzTg8nWwonmgUPPwJmPIaJzfEoJl8DbuylpgXqGCQ4doJXuvBODHIehPfyMr1xCWqNlNNLkcWg/a/eHFceyt3IlcD9XaZ1aKPzPmpjYKKf5amiYd6mAssw8zFaZUvwaXkNuHZpXVZyg6C6TkT6kdfln+6fOJZpSGQzksy0jka/Rzx0KXjsp3oqO4tQJbC7AX0nvmD0zvLtyCURzfGV+n2IqQxpPf2nP75Evt8jamcuqm6pWoe+hj9zjGytIXpSKe35wzRwUAUrjgmZ9NweuWfi2uMPJlDv8/n+Q3HyjygA+GzixBGuYXDt1CD8ISZvuoygS+9+jeY9uYH8b me@Onyx\\n\", pairUUID = UUID \"834b4f39-ca66-4baf-9323-57ef7058d7d0\"},IPv4Addr 2281744576), verifiableDigest = \"8d5d380542f7377f09a4584a38b0dbcea9ea215c\"})"
[2013-11-01 16:56:00 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"kubbie\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvBEWT+AiAmehOFyTQWlSdwDs7DDbkw7rfZ4W/IeG5awZjMgT5BefIv9cmar8vGIIEFMZLpf8cL3xIargDz0xE2wuqj5CLkdz+DKp5f2FGs11Ax/62DZr+eCiVtPnwijFw0Cz0wMRzkN93uedrvzP/KkNRcczgWh3aZqn8WxlkCia1fyykm/pP3W80MNkiJYX5vXpu1NCV5KLu+UXQzKhM2njOauJ3W5wsMvSl8faZIpEmKVCD3BMDDruxTIxggA3kt9GCGvIbPawy+fGOpp/j6pHqnX3GB2kkT47RIZKYEv99HuLyvea+oY5R11FsC2yYY3ujIdUU0fXnV8pvrqSv me@kubbie\\n\", pairUUID = UUID \"fd6a6858-76c9-4eea-b733-9359c7313e72\"},IPv4Addr 1879091392), verifiableDigest = \"cbd8197c3d78c8c68bb30f63aa974cd88dd0fb13\"})"
[2013-11-01 16:56:01 CDT] PairListener: received "PairMsg (Verifiable {verifiableVal = (PairReq,PairData {remoteHostName = Just \"Onyx\", remoteUserName = \"me\", remoteDirectory = \"~/annex\", remoteSshPubKey = \"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBT0Y6TTzTg8nWwonmgUPPwJmPIaJzfEoJl8DbuylpgXqGCQ4doJXuvBODHIehPfyMr1xCWqNlNNLkcWg/a/eHFceyt3IlcD9XaZ1aKPzPmpjYKKf5amiYd6mAssw8zFaZUvwaXkNuHZpXVZyg6C6TkT6kdfln+6fOJZpSGQzksy0jka/Rzx0KXjsp3oqO4tQJbC7AX0nvmD0zvLtyCURzfGV+n2IqQxpPf2nP75Evt8jamcuqm6pWoe+hj9zjGytIXpSKe35wzRwUAUrjgmZ9NweuWfi2uMPJlDv8/n+Q3HyjygA+GzixBGuYXDt1CD8ISZvuoygS+9+jeY9uYH8b me@Onyx\\n\", pairUUID = UUID \"834b4f39-ca66-4baf-9323-57ef7058d7d0\"},IPv4Addr 2281744576), verifiableDigest = \"8d5d380542f7377f09a4584a38b0dbcea9ea215c\"})"
...and so on and so on...
# End of transcript or log.
"""]]
> I was able to reproduce something very like this by starting
> pairing separately on both computers under poor network conditions (ie,
> weak wifi on my front porch).
>
> So, I've made a new PairReq message that has not been seen before
> always make the alert pop up, even if the assistant thinks it is
> in the middle of its own pairing process (or even another pairing process
> with a different box on the LAN).
>
> (This shouldn't cause a rogue PairAck to disrupt a pairing process part
> way through.)
>
> [[done]] --[[Joey]]