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Convert watchStuckJobs implementation to use SCAN instead of KEYS #1174

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Convert watchStuckJobs implementation to use SCAN instead of KEYS #1174

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26 changes: 15 additions & 11 deletions lib/kue.js
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Original file line number Diff line number Diff line change
Expand Up @@ -278,19 +278,23 @@ Queue.prototype.watchStuckJobs = function( ms ) {
prefix = '{' + prefix + '}';
}
var script =
'local msg = redis.call( "keys", "' + prefix + ':jobs:*:inactive" )\n\
'local cursor = "0"\n\
local need_fix = 0\n\
for i,v in ipairs(msg) do\n\
local queue = redis.call( "zcard", v )\n\
local jt = string.match(v, "' + prefix + ':jobs:(.*):inactive")\n\
local pending = redis.call( "LLEN", "' + prefix + ':" .. jt .. ":jobs" )\n\
if queue > pending then\n\
need_fix = need_fix + 1\n\
for j=1,(queue-pending) do\n\
redis.call( "lpush", "' + prefix + ':"..jt..":jobs", 1 )\n\
repeat\n\
local window = redis.call( "scan", cursor, "match", "' + prefix + ':jobs:*:inactive", "COUNT", "100")\n\
cursor = window[1]\n\
for i,v in ipairs(window[2]) do\n\
local queue = redis.call( "zcard", v )\n\
local jt = string.match(v, "' + prefix + ':jobs:(.*):inactive")\n\
local pending = redis.call( "LLEN", "' + prefix + ':" .. jt .. ":jobs" )\n\
if queue > pending then\n\
need_fix = need_fix + 1\n\
for j=1,(queue-pending) do\n\
redis.call( "lpush", "' + prefix + ':"..jt..":jobs", 1 )\n\
end\n\
end\n\
end\n\
end\n\
end\n\
until (cursor == "0")\n\
return need_fix';
clearInterval(this.stuck_job_watch);
client.script('LOAD', script, function( err, sha ) {
Expand Down