I have few workers that have no errors in log. But same code in production from time to time show errors. It's not critical, but I want to understand what is the difference and how to catch and fix the errors. Here part of log with error:
2016-01-18T16:34:10.725Z 535 TID-otb5ze3fo TopUpdateWorker JID-73c584ed6fec322784d67796 INFO: start
2016-01-18T16:34:10.725Z 535 TID-otb5ze3fo TopUpdateWorker JID-73c584ed6fec322784d67796 INFO: Things are happening.
2016-01-18T16:34:10.824Z 535 TID-otb5ze3fo TopUpdateWorker JID-73c584ed6fec322784d67796 INFO: fail: 0.099 sec
2016-01-18T16:34:10.824Z 535 TID-otb5ze3fo WARN: {"class"=>"TopUpdateWorker", "args"=>[], "retry"=>3, "queue"=>"default", "jid"=>"73c584ed6fec322784d67796", "created_at"=>1453134850.724368, "enqueued_at"=$
2016-01-18T16:34:10.824Z 535 TID-otb5ze3fo WARN: TypeError: no implicit conversion of nil into Array
2016-01-18T16:34:10.824Z 535 TID-otb5ze3fo WARN: /var/www/vkgazer/code/lib/modules/common_mods.rb:27:in `+'
/var/www/vkgazer/code/lib/modules/common_mods.rb:27:in `get_request'
/var/www/vkgazer/code/app/models/post.rb:170:in `top_post_updater'
/var/www/vkgazer/code/app/workers/top_update_worker.rb:9:in `perform'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:150:in `execute_job'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:127:in `block in invoke'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/active_record.rb:6:in `call'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/logging.rb:30:in `with_context'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/logging.rb:7:in `call'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:132:in `call'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:132:in `invoke'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:127:in `block in process'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:166:in `stats'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:126:in `process'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:79:in `process_one'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:67:in `run'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/util.rb:16:in `watchdog'
/var/www/vkgazer/code/vendor/bundle/ruby/2.2.0/gems/sidekiq-4.0.1/lib/sidekiq/util.rb:24:in `block in safe_thread'
The error is always in this string. Here is the code:
def get_request(code) #
i = 0
result = []
while i < code.size #
part_code = code.slice(i, 25)
if part_code.size >1
str_code = part_code.join(',')
else
str_code = part_code[0]
end
url='https://api.x.com/method/execute'
uri = URI.parse(url)
parameters = {'access_token' => '00',
'code' => "return [#{str_code}];", 'v' => '2'}
response = Net::HTTP.post_form(uri, parameters) #
result = result + JSON.parse(response.body)['response'] #here is error
i += 25
sleep 0.35
end
result #
end
Here I send requests to API and sum all responses in result. And one more thing in development I have durations of jobs less then 10 sec, but in production it can be 160 sec. My computer is better then server?
So any time that your response.body contains an "empty" response, like "{}" or if it's just missing the 'response' element, then JSON.parse(response.body)['response'] will be nil and so your code is trying to do:
result + nil
...and you're getting this error. Probably the best way around this is something like this:
result = result + ( JSON.parse(response.body)['response'] || [] )