ImageMagick / Paperclip-大型工作期间回形针失败

Question

I'm using Paperclip with ImageMagick to process a few thousands images and upload them to S3. It goes through hundreds of images with no issues, and then gives this error:

An error was received while processing: #<Paperclip::Errors::CommandNotFoundError: Could not run the identify command. Please install ImageMagick> command. Please install ImageMagick>

I've seen other questions referencing this error, but it seems strange to me that it can process fine one second, and then the next not be able to find ImageMagick. I'm processing with Sidekiq with 25 concurrent workers.

It's interesting to note that when shutting down sidekiq and restarting, it starts to work again.

Answer 1

I was having the exact same problem, and have traced it down to a thread-safety issue in Paperclip. See https://github.com/thoughtbot/paperclip/issues/1709

Answer 2

似乎通过将与sidekiq一起使用的并发工作程序数限制为1可以解决此问题。这可以通过在启动sidekiq时指定-c 1来完成。