A copy of XXX has been removed from the module but is still active

Question

I am basically running a background process that checks for files, and then updates the rails model based on the data discovered in the file. However, I can't access the model from within the thread because of an error.

Here's my example:

def check_logs
    while @start == 1
        results = Dir.glob("#{@path}/*.txt")
        unless results.empty?
            results.each do |result|
                file_name = result.split("/")[-1]
                data = File.open(result).read

                if file_name.include? "get"
                    data_contents = data.split("\n")
                    time = data_contents[0]
                    ExamResult.create(time: time)
                end
                FileUtils.rm_rf result
            end
        end

        sleep 5
    end
end

def start_agent
    @start = 1
    Thread.start {check_logs}
end

def stop_agent
   @start = 0
end

However, while it's in the background, this is the error that I see coming across the console:

terminated with exception (report_on_exception is true): Traceback (most recent call last): 5: from portal/lib/custom_rb/exam_results/exam_custom.rb:69:in block in start_monitoring_agent' 4: from portal/lib/custom_rb/exam_results/exam_custom.rb:40:incheck_logs' 3: from portal/lib/custom_rb/exam_results/exam_custom.rb:40:in each' 2: from portal/lib/custom_rb/exam_results/exam_custom.rb:46:inblock in check_logs' 1: from /home/nutella/.rvm/gems/ruby-2.5.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:202:in const_missing' /home/user/.rvm/gems/ruby-2.5.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:496:inload_missing_constant': A copy of ExamResult has been removed from the module tree but is still active! (ArgumentError)

My goal here is just to have a backgrounded process to monitor for logs. I've seen some other posts about this same exact error, but perhaps I could be doing this a little better other than the solutions provided for them.

Any thoughts or feedback would be greatly appreciated.

Stanislav Mekhonoshin Stanislav Mekhonoshin · Accepted Answer · 2018-09-10T19:24:11

I don't think that provided error is somehow related to the code above. Usually, this error happens when you modify your classes at runtime with metaprogramming.

Take a look at places where you require, define ExamResult, it looks like you require it several times in your code.

A copy of XXX has been removed from the module but is still active

1 Answers