Limit Sidekiq args logging to 10 KB of JSON

When logging arguments from Sidekiq to JSON, restrict the size of `args`
to 10 KB (when converted to JSON). This is to avoid blowing up with
excessively large job payloads.

1 files changed, 7 insertions, 2 deletions

diff --git a/doc/development/sidekiq_debugging.md b/doc/development/sidekiq_debugging.md
index 84b61bd7e61..2b3a9481b93 100644
--- a/doc/development/sidekiq_debugging.md
+++ b/doc/development/sidekiq_debugging.md
@@ -11,6 +11,11 @@ Example:
 gitlab_rails['env'] = {"SIDEKIQ_LOG_ARGUMENTS" => "1"}
 ```
 
-Please note: It is not recommend to enable this setting in production because some 
+Please note: It is not recommend to enable this setting in production because some
 Sidekiq jobs (such as sending a password reset email) take secret arguments (for
-example the password reset token).
\ No newline at end of file
+example the password reset token).
+
+When using [Sidekiq JSON logging](../administration/logs.md#sidekiqlog),
+arguments logs are limited to a maximum size of 10 kilobytes of text;
+any arguments after this limit will be discarded and replaced with a
+single argument containing the string `"..."`.