Strip ActiveJob keys to prevent recursion

lib/raven/integrations/sidekiq.rb

@@ -23,6 +23,35 @@ def call(_worker, msg, _queue)
   end
 else
   Sidekiq.configure_server do |config|
-    config.error_handlers << Proc.new {|ex,context| Raven.capture_exception(ex, :extra => {:sidekiq => context}) }
+    config.error_handlers << Proc.new { |ex, context|
+      Raven.capture_exception(ex, :extra => {
+        :sidekiq => filter_context(context),
+      })
+    }
   end
 end
+
+def filter_context(context)
+  case context
+    when Array
+      context.map { |arg| filter_context(arg) }
+    when Hash
+      Hash[context.map { |key, value| filter_context_hash(key, value) }]
+    else
+      context
+    end
+end
+
+def filter_context_hash(key, value)
+  # Strip any `_aj` prefixes from keys.
+  # These keys come from an internal serialized object from ActiveJob.
+  # Internally, there are a subset of keys that ActiveJob references, but
+  # these are declared as private, and I don't think it's wise
+  # to keep chasing what this list is. But they all use a common prefix, so
+  # we want to strip this becuase ActiveJob will complain.
+  # e.g.: _aj_globalid -> _globalid
+  if key[0..3] == '_aj_'
+    key = key[3..-1]
+  end
+  [key, filter_context(value)]
+end