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keith_leitch

Senior Member
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Posts: 525
Reply with quote  #1 
So, I was using my 7160 through TMSClient/Server to watch a show on my 2460. Everything was going beautifully, as it has forever, when suddenly both machines froze (meaning that video froze on the show, audio stopped, and both units became unresponsive to the remotes or the 2460's front panel). Rebooted both machines, and could not reestablish contact. Rebooted my modem, and both machines, and could not reestablish contact. I'm going through a third reboot now, but I'm not hopeful.

As far as I can tell, both machines are still networked. At least, I'm able to use Filezilla to FTP into them.


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keith_leitch

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Reply with quote  #2 
All is back in action again, but I don't know why. The third reboot did no good, but after about 15 minutes contact just arbitrarily reestablished. I will keep you posted if something recurs.
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DeltaMikeCharlie

Mostly Harmless
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Posts: 235
Reply with quote  #3 
I have found that from time to time, the underlying NFS client gets disconnected from the underlying NFS server.  In my experience, this is a random and unpredictable event and I mostly just attribute the behaviour to transient network shenanigans.  When such a disconnection occurs, the client PVR will freeze and will normally require a hard power reset to recover.

In an attempt to prevent this, the client and server exchange regular "keep alive" messages and when the server fails to respond, the client automatically stops playback.  This is controlled by the "Server Timeout" setting in TMSClient.

If the setting is too small, transient network issues may trigger a false positive and the client will take protective measures and stop playback unnecessarily.  If, however, the setting is too large, an authentic network outage (or server freeze) may not be recognised in time and the client will freeze because it can no longer read the playback file.

The PVR firmware was not designed with playback of files anywhere other than its local HDD or connected USB device.  The firmware is not resilient enough to recognise when access to a file magically disappears and simply stop playback, I suspect that it will be caught in some kind of loop.  I have see a client recover when the server is rebooted, but very rarely.

I think that a possible explanation is that: 1) your server PVR froze; 2) your timeout period is not quite right; and therefore 3) your client froze too.

Please note, if a recording is in progress on the client PVR when it freezes because of this, it tends to keep recording OK!
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keith_leitch

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Reply with quote  #4 
Thanks. This all tracks. I have seen the client stop playback a few times, but it has been a long time since the freeze. If it happens again, I'll check the Server Timeout setting.

Something that may be related happened later in the day, when the client stopped responding again but, this time, with no file playing back (just on Live TV).
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