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}Exception in filterworker {"exception"=>#<TypeError: can't clone Fixnum>,
 "backtrace"=>["org/jruby/RubyKernel.java:2057:in `clone'",
 "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/event.rb:82:in `clone'"
 "org/jruby/RubyHash.java:1338:in `each'",
 "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/event.rb:80:in `clone'", 
"file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/filters/split.rb:52:in `filter'", "org/jruby/RubyArray.java:1613:in `each'", "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/filters/split.rb:49:in `filter'",
 "(eval):80:in `initialize'", "org/jruby/RubyProc.java:271:in `call'",
 "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/pipeline.rb:255:in `filter'",
 "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/pipeline.rb:196:in `filterworker'",
 "file:/opt/logstash/logstash-1.3.1-flatjar.jar!/logstash/pipeline.rb:136:in `start_filters'"],
 :level=>:error}