Subsections
Troubleshooting Tips and Warnings
If you have problems running the Render Farm. Here is a
list of items to check.
- CINELERRA-GG must be installed on the master node and all client
machines.
- It is best to have the same username available on all nodes to
avoid problems with access rights.
- Check file permissions and ownership to ensure that the
clients all have access.
- If a node does not have access to an input asset it will not
die, but just display error messages.
- If a node can not access an output asset, the rendering will
abort.
- A port in use when stopped may take up to 30 seconds to time
out before you can restart the jobs.
- Each of the port combinations have to be unique across
clients, and not already in use in the network.
- CINELERRA-GG load balances on a first come, first serve basis. If
the last section of the video is sent to the slowest node, the
render job will have to wait for the slowest node to finish. It
would be better to start on the slowest node with the earlier
section of the video so keep that in mind when designating port
numbers.
- If not running as root, a port number in the higher range of
10650 and above must be used instead of the 401 + range.
- The master and client jobs on the ports do not go away so if
you want to stop them, you will have to kill them via: kill
PID#.
- Check to see if there are services listening on the ports to
use: netstat -n -l -4 –protocol inet
- There is a watchdog timer in CINELERRA-GG and if there is no
response from a client in the designated number of seconds, it will
kill the render job.
- The localhost should exist as 127.0.0.1 in
/etc/hosts and as the lo network device in
ifconfig.
- If the job loads become unbalanced, you may want to
reset rates to start over for new framerates.
- If jobs are split in a key section on the timeline, you may
wish to use labels to prevent this.
- For testing purposes, you may want to start a client in the
foreground using -f instead of -d.
- If one of the client computers is unavailable, check to see if
there is an X to the left of the nodename in the
Nodes listbox. Check the X to disable it which sets ON to
OFF.
- A red message in the lower left hand corner of the main
timeline that reads Failed to start render farm often means
that the client CINELERRA-GG programs were not started up.
- A message of RenderFarmWatchdog::run 1 killing server
thread
#address# means that the client did not respond in
time. You can adjust the timer in Settings
→
Preferences, Performance tab.
- When you get the message RenderFarmClient::main_loop:
bind port 400: Address already in use, use a different port. See /etc/services for free ports.
- A message of RenderFarmServerThread::open_client:
unknown host abcompany means that the hostname of abcompany is not
in /etc/hosts so you will have to add it or use the ip
address instead.
- There are numerous error messages associated with file
open/close/status or problems with the file that should be
dealt with according to what is printed out.
- Other illustrative messages may be shown such as:
RenderFarmClientThread:: run: Session finished.
And here are a couple of more tips for making Render Farm specific
for your setup.
- Because index files speed up displaying the video you
may want to share these files with the clients on a shared
filesystem. More information on index files configuration is
outlined in 16.5.3.
- Or, one of the convenient features of CINELERRA-GG is the
redirection of the path via CIN_CONFIG as in:
CIN_CONFIG="/<shared_file_pathname>/<filename_such_as_.bcast5>" cin
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This means that you can make project related
configurations that do not impact the default $HOME
config. You can either export your default $HOME config
or the CIN_CONFIG config to use on the render farm.
If one of the render farm computers is connected to the internet,
you should use a firewall to maintain the safety of all of the
computers. The ports have to be reachable for the intranet but you
do not want the ports to be open to the outside.
The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org
