Lost connection to MySQL server during query

Hi everyone!

We are experiencing intermittent connection loss.

• Server: Windows Server R2 Standard
• BitNami Stack: Redmine 2.0.0.0

production.log:

ActiveRecord::StatementInvalid (Mysql::Error: Lost connection to MySQL server during query: INSERT INTO `journal_details` (`journal_id`, `old_value`, `prop_key`, `property`, `value`) VALUES (?, ?, ?, ?, ?)):
  app/models/journal.rb:47:in `save'
  app/models/issue.rb:1046:in `create_journal'
  app/models/issue.rb:711:in `save_issue_with_child_records'
  app/models/issue.rb:698:in `save_issue_with_child_records'
  app/controllers/issues_controller.rb:182:in `update'

Do you have an idea of what could be causing the problems?

Thanks in advance.