Revision d916feaa7a586f675a702f952f079ae90996ee39 authored by Mike Perham on 22 March 2017, 18:22:45 UTC, committed by Mike Perham on 22 March 2017, 18:22:45 UTC
5.0-Upgrade.md
# Welcome to Sidekiq 5.0!
Sidekiq 5.0 contains a reworked job dispatch and execution core to integrate
better with the new Rails 5.0 Executor. It also drops support for older
versions of Ruby and Rails and adds support for RTL languages in the Web UI.
## What's New
* Integrate job logging and retry logic directly in with the job
execution logic in Sidekiq::Processor. Previously this logic was
defined as middleware. In Rails 5.0, ActiveSupport::Executor handles ActiveRecord
connection management, job callbacks, development mode class loading,
etc. Because of its extensive responsibilities, the Executor can't be
integrated as Sidekiq middleware; the logging/retry logic had to be pulled out
too. Sidekiq 4.2 had a hack to make it work but this redesign provides
a cleaner integration. [#3235]
* The Delayed Extensions `delay`, `delay_in` and `delay_until` APIs are
no longer available by default. The extensions allow you to marshal
job arguments as YAML, leading to cases where job payloads could be many
100s of KB or larger if not careful, leading to Redis networking
timeouts or other problems. As noted in the Best Practices wiki page,
Sidekiq is designed for jobs with small, simple arguments.
Add this line to your initializer to re-enable them and get the old behavior:
```ruby
Sidekiq::Extensions.enable_delay!
```
The old `Sidekiq.remove_delay!` API has been removed as it is now the default. [#3299]
* Sidekiq's quiet signal is now `TSTP` (think of it as **T**hread
**ST**o**P**) instead of USR1 as USR1 is not available on JRuby.
USR1 will continue to be supported in Sidekiq 5.x for backwards
compatibility and will be removed in Sidekiq 6.x. [#3302]
* The Web UI is now bi-directional - it can render either LTR
(left-to-right) or RTL languages. With this change, **Farsi, Arabic,
Hebrew and Urdu** are officially supported. [#3381]
* Rails 3.2 is no longer supported.
* Ruby 2.0 and Ruby 2.1 are no longer supported. Ruby 2.2.2+ is required.
* Jobs which can't be parsed due to invalid JSON are now pushed
immediately to the Dead set since they require manual intervention and
will never execute successfully as is. [#3296]
## Upgrade
As always, please upgrade Sidekiq **one major version at a time**.
If you are already running Sidekiq 4.x, then:
* Upgrade to the latest Sidekiq 4.x.
```ruby
gem 'sidekiq', '< 5'
```
* Fix any deprecation warnings you see.
* Upgrade to 5.x.
```ruby
gem 'sidekiq', '< 6'
```
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