由于从Redis切换到Heroku Redis,我们的Ruby on Rails应用程序中的Redis代码每天几次都会收到“OpenSSL::SSL::SSLError:SSL_read:sslv3 Alert bad record mac”错误。
有什么想法吗?
最佳答案
我在Ruby on Rails应用程序中通过重试这些错误来解决此问题。到目前为止,似乎已经摆脱了错误。我们过去每天只有大约5天的时间,而自从引入此解决方法以来,过去一天一直没有。
在config/initializers/redis_heroku_error_handling.rb
中:
# Hack to retry errors on Heroku Redis: https://stackoverflow.com/questions/50228454/why-am-i-getting-opensslsslsslerror-ssl-read-sslv3-alert-bad-record-mac
raise "Ensure this hack still works!" if Redis::VERSION != "3.3.5"
module RedisHerokuErrorHandlingHack
def call(command)
attempts_left = 3
begin
super
rescue OpenSSL::SSL::SSLError => e
raise unless e.message.include?("SSL_read: sslv3 alert bad record mac")
attempts_left -= 1
raise unless attempts_left > 0
retry
end
end
end
class Redis::Client
prepend RedisHerokuErrorHandlingHack
end
在
spec/initializers/redis_heroku_error_handling_spec.rb
中:require "rails_helper"
describe RedisHerokuErrorHandlingHack do
it "retries 'bad record mac' errors" do
exception = OpenSSL::SSL::SSLError.new("SSL_read: sslv3 alert bad record mac")
fail_then_maybe_succeed(exception: exception, fail_times: 2)
expect($redis.get("hello")).to eq("success response")
end
it "fails if a few retries didn't help" do
exception = OpenSSL::SSL::SSLError.new("SSL_read: sslv3 alert bad record mac")
fail_then_maybe_succeed(exception: exception, fail_times: 3)
expect { $redis.get("hello") }.to raise_error(/bad record mac/)
end
it "does not retry other errors" do
fail_then_maybe_succeed(exception: "Boom", fail_times: 2)
expect { $redis.get("hello") }.to raise_error("Boom")
end
private
def fail_then_maybe_succeed(exception:, fail_times:)
attempt_count = 0
allow_any_instance_of(Redis::Client).to receive(:process) do |*args|
attempt_count += 1
if attempt_count <= fail_times
raise exception
else
"success response"
end
end
end
end
关于heroku - 为什么我会间歇性地从Heroku Redis获得 “OpenSSL::SSL::SSLError: SSL_read: sslv3 alert bad record mac”?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/50228454/