[Tile-serving] [openstreetmap/mod_tile] "Failed to read cmd on fd" errors since mod_tile update on 2nd June (#77)

[SomeoneElseOSM]

You're seeing a "DEBUG: DONE TILE" message, which means that apache's sent the message via mod_tile to renderd, and renderd has created a metatile.  You should be able to see a file in "/var/lib/mod_tile/default/8/0/0/0/250/128.meta"  The fact that you can't then see that when you view it presumably in a web browser is a different issue - maybe there's a permissions issue somewhere, or whatever you've set up to view tiles isn't working.

The debug steps in https://switch2osm.org/manually-building-a-tile-server-16-04-2-lts/ may help a bit, specifically:

1. Initiallly just try and view http://yourserveripaddress/hot/0/0/0.png (or whatever for your tile location)
2. Run renderd in the foreground to see how it reacts to incoming commands
3. Use something like “Switcheroo Redirector” to make your tiles appear via openstreetmap.org in Chrome or Chromium.



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