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Strange behaviour in multiplayer

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Strange behaviour in multiplayer 16/11/2015 at 22:20 #77782
lama77
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Not sure if it relates to only this sim, I have not seen it before.
Doesn't seem to be network lag either.

A few screenshots.

#1 - 2T11 sits on multiple lines (DS/US LSNT/APPR).
#2 - On UF 1W78 sat there but wasn't there in reality. On DF shows faulty occupied track at Harrow.

Doubt it's lag because ran another panel (Rugby C) with same host without any problem

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Strange behaviour in multiplayer 16/11/2015 at 22:31 #77784
belly buster
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" said:
Not sure if it relates to only this sim, I have not seen it before.
Doesn't seem to be network lag either.

A few screenshots.

#1 - 2T11 sits on multiple lines (DS/US LSNT/APPR).
#2 - On UF 1W78 sat there but wasn't there in reality. On DF shows faulty occupied track at Harrow.

Doubt it's lag because ran another panel (Rugby C) with same host without any problem
Were you hosting?

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Strange behaviour in multiplayer 16/11/2015 at 22:33 #77785
lama77
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No running a client in hosted session.
Not any of the others had problems.

And if it would have been network lag, things like #1 issue where 2T11 was at a place it has never been before should not happen (I guess).

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Strange behaviour in multiplayer 16/11/2015 at 22:50 #77787
dannywith
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Myself and a friend seem to have a similar problem when hosting any sims using the loader. It started after an update a while back. The older sims that come as individual EXE's seem okay, though.
Working to create an accurate national railway timetable - railwaydata.co.uk
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Strange behaviour in multiplayer 16/11/2015 at 23:03 #77788
belly buster
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Occasionally on a multiplayer if you are not the host, you do get the odd glitch. If you disconnect and reconnect it should fix any issues.
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Strange behaviour in multiplayer 16/11/2015 at 23:45 #77792
lama77
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Tried that aswell with tonights session a few times. Still no better result.
Will check if problem reoccurs on another session.
I have joined a number of them lately and this is first time I see it.

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Strange behaviour in multiplayer 17/11/2015 at 00:51 #77793
JamesN
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There can be issues when you save a game with a train straddling the boundary between chained sims.
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Strange behaviour in multiplayer 17/11/2015 at 11:32 #77802
Stephen Fulcher
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2025 posts
Can you clear the faulty track circuits with the Incident Panel (F11)?

Seems odd that a train would end up on a different line in a completely different direction, never seen that one before.

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Strange behaviour in multiplayer 17/11/2015 at 16:32 #77814
GeoffM
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Probably network issues then, especially if running a big sim like Rugby C at the same time.
SimSig Boss
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Strange behaviour in multiplayer 18/11/2015 at 10:02 #77837
lama77
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Could be, but check attachement #1.

If there is network lag, I would assume a thing like 2T11 would not happen. It's not just a delay (lag), 2T11 have not even been in that location before.

Also, I was part of the same multiplay with same host on another panel earlier, without any problem. The problem just started when I joined (and tried to rejoin) Wembley.

Have also tried now to re-create the problem myself by hosting a large chain myself and run across to another computer and cannot get the same problem to appear.

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Strange behaviour in multiplayer 18/11/2015 at 21:32 #77881
lama77
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Had the same behaviour tonight on Victoria Central when joining.

What I BELIVE, just being a novice troubleshooter is, if the network is a bit slow (my latency to the host was about 50 msec, not bad really) the initial load of data from host takes too long, especially if there is a bit of volume.
Then something odd happens.

Visually it looks like the initial load is not done when actual updates are being pushed.

In the case of Victoria Central the part of the trouble was to the far "right" of the panel, hence around Central.
In the case (also tested because it was a chain) of Victoria South East the part of trouble was also the far right around Swanley Jn.

I have a video from the load of central. If anyone is interested PM me and I send over e-mail. For the deep techie's I actually also took a network trace from the load (using a tcp dump tool, file format is pcap). Yes I know, I'm a bit of a network geek

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Strange behaviour in multiplayer 18/11/2015 at 21:57 #77883
GeoffM
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" said:
Could be, but check attachement #1.
I'd need to see the host's screen for comparison. TDs don't magically appear in the wrong berth on a client.


" said:
Also, I was part of the same multiplay with same host on another panel earlier, without any problem. The problem just started when I joined (and tried to rejoin) Wembley.

Have also tried now to re-create the problem myself by hosting a large chain myself and run across to another computer and cannot get the same problem to appear.
That's the trouble with networks: very difficult to reproduce network errors.

SimSig Boss
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Strange behaviour in multiplayer 18/11/2015 at 22:03 #77885
GeoffM
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" said:
Had the same behaviour tonight on Victoria Central when joining.

What I BELIVE, just being a novice troubleshooter is, if the network is a bit slow (my latency to the host was about 50 msec, not bad really) the initial load of data from host takes too long, especially if there is a bit of volume.
Then something odd happens.
When connecting, you get a snapshot of the sim at the time of connecting, which takes an appreciable amount of time to transfer, especially for bigger sims. We don't want to slow down the experience for other clients already joined so we slow down the transfer a little. Then, once you have the snapshot, you need all the updates that have happened since the snapshot started, so another chunk of data.

Latency/lag isn't really relevant. That would only cause delays when setting a route or whatever, but - assuming you're not downloading movies, Netflixing, or suchlike - you can still play.


" said:
In the case of Victoria Central the part of the trouble was to the far "right" of the panel, hence around Central.
In the case (also tested because it was a chain) of Victoria South East the part of trouble was also the far right around Swanley Jn.
The updates are deliberately jumbled up a bit so the right hand end was not necessarily the last to come in.


" said:
I have a video from the load of central. If anyone is interested PM me and I send over e-mail. For the deep techie's I actually also took a network trace from the load (using a tcp dump tool, file format is pcap). Yes I know, I'm a bit of a network geek :)
You need to capture both the server and client end because otherwise you can't see what's not there.

SimSig Boss
Last edited: 18/11/2015 at 22:13 by GeoffM
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Strange behaviour in multiplayer 19/11/2015 at 00:13 #77889
lama77
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Ok, will try to capture on both sides the next time problem appears.
If you want the video still from my side (client) let me know.

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