We have encountered an issue when using Predis (tried to use PHPredis as this is being used server-side). At the moment Predis is working however we are getting the following errors:
Predis\Response\ServerException: BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE. in Predis\Client->onErrorResponse() (line 370 of /home/SITENAME/public_html/sites/all/libraries/predis/src/Client.php).
The error you seems to be caused by timeout
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[11312] 16 Feb 17:45:27.395 # Lua slow script detected: still in execution after 5932 milliseconds. You can try killing the script using the SCRIPT KILL command.
[11312] 16 Feb 17:45:50.097 * 10 changes in 300 seconds. Saving...
[11312] 16 Feb 17:45:50.106 * Background saving started by pid 22501
[22501] 16 Feb 17:45:51.758 * DB saved on disk
[22501] 16 Feb 17:45:51.765 * RDB: 3 MB of memory used by copy-on-write
[11312] 16 Feb 17:45:51.809 * Background saving terminated with success
[11312] 16 Feb 17:50:27.211 # Lua slow script detected: still in execution after 5878 milliseconds. You can try killing the script using the SCRIPT KILL command.
[11312] 16 Feb 17:50:52.085 * 10 changes in 300 seconds. Saving...
[11312] 16 Feb 17:50:52.093 * Background saving started by pid 22610
[22610] 16 Feb 17:50:53.803 * DB saved on disk
[22610] 16 Feb 17:50:53.810 * RDB: 2 MB of memory used by copy-on-write
[11312] 16 Feb 17:50:53.898 * Background saving terminated with success
[11312] 16 Feb 17:55:27.518 # Lua slow script detected: still in execution after 6067 milliseconds. You can try killing the script using the SCRIPT KILL command.
[11312] 16 Feb 17:55:54.012 * 10 changes in 300 seconds. Saving...
[11312] 16 Feb 17:55:54.020 * Background saving started by pid 22940
[22940] 16 Feb 17:55:55.692 * DB saved on disk
[22940] 16 Feb 17:55:55.699 * RDB: 3 MB of memory used by copy-on-write
[11312] 16 Feb 17:55:55.723 * Background saving terminated with success
[11312] 16 Feb 18:00:28.138 # Lua slow script detected: still in execution after 5928 milliseconds. You can try killing the script using the SCRIPT KILL command.
[11312] 16 Feb 18:00:56.071 * 10 changes in 300 seconds. Saving...
[11312] 16 Feb 18:00:56.080 * Background saving started by pid 23053
[23053] 16 Feb 18:00:57.810 * DB saved on disk
[23053] 16 Feb 18:00:57.816 * RDB: 2 MB of memory used by copy-on-write
[11312] 16 Feb 18:00:57.884 * Background saving terminated with success
[11312] 16 Feb 18:05:29.228 # Lua slow script detected: still in execution after 6150 milliseconds. You can try killing the script using the SCRIPT KILL command.
[11312] 16 Feb 18:05:58.051 * 10 changes in 300 seconds. Saving...
[11312] 16 Feb 18:05:58.059 * Background saving started by pid 23279
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https://github.com/andymccurdy/redis-py/issues/375
https://github.com/Pathgather/predictor/issues/41
Predis seem ot have a timeout setting - https://github.com/nrk/predis/wiki/Connection-Parameters
timeout [float - default: 5.0]
Timeout (expressed in seconds) used to connect to a Redis server after which an exception is thrown.
Is there a way we can override the timeout in the settings.php? Perhaps there is a better suggestion?
Should we try and use PHPredis again?
Needs review
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Fixed the patch from @vladbo so it works again in Drupal 10.4.3.
timeout isn't configurable for others. There are no long running scripts or anything like that in 8.x-1.x, so the only reason to have this would be to avoid a long wait in case the connection can't be established, and for that it should be 0.5s like phpredis.