我遇到了一个非常大的问题。我的应用程序正在执行几千个SQL查询，然后突然出现了这个错误。如果我通过rake任务或直接通过rails控制台执行代码都没有区别。
有人知道这是什么意思吗？从来没有看到过与rails记录器相关的这个错误。
环境：
ruby-2.1.2
postgres 9.3
rails 4.1.5
Could not log "sql.active_record" event. SystemStackError: stack level too deep ["/Users /ghostrifle/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.5/lib/active_support/tagged_logging.rb:46"]
SystemStackError: stack level too deep
from /Users/ghostrifle/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/irb/workspace.rb:86
Maybe IRB bug!
在第23个调用者之后，异常被抛出。
以下是SystemStackError异常的检查结果。
[
"/Users/ghostrifle/Entwicklung/xxx_main/lib/tasks/tree_spot.rake:42:in `block (2 levels) in <top (required)>'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:240:in `call'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:235:in `each'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'",
"/Users/ghostrifle/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:150:in `invoke_task'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:106:in `each'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:106:in `block in top_level'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:115:in `run_with_threads'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:100:in `top_level'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:78:in `block in run'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/gems/rake-10.3.2/bin/rake:33:in `<top (required)>'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/bin/rake:23:in `load'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/bin/rake:23:in `<main>'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `eval'",
"/Users/ghostrifle/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `<main>'"
]