Module: WaterDrop::Patches::Rdkafka::Metadata

Defined in:
lib/waterdrop/patches/rdkafka/metadata.rb

Overview

Rdkafka::Metadata patches

Instance Method Summary collapse

Instance Method Details

#initialize(*args) ⇒ Object

We overwrite this method because there were reports of metadata operation timing out when Kafka was under stress. While the messages dispatch will be retried, metadata fetch happens prior to that, effectively crashing the process. Metadata fetch was not being retried at all.

Parameters:

  • args (Array<Object>) —

    all the metadata original arguments



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# File 'lib/waterdrop/patches/rdkafka/metadata.rb', line 16

def initialize(*args)
  attempt ||= 0
  attempt += 1

  super(*args)
rescue ::Rdkafka::RdkafkaError => e
  raise unless e.code == :timed_out
  raise if attempt > 10

  backoff_factor = 2**attempt
  timeout = backoff_factor * 0.1

  sleep(timeout)

  retry
end