Critical error in multiline filter plugin

Description

My logstash instance works in production.
And while reading multiline messages, I had several time the following error in multiline filter plugin, which makes all logstash KO (it stops to process next log messages until I restart it).
I don't have the message that causes the problem.
the input is tcp.

Here the logstash log about this error :

1 2 3 4 5 6 7 8 9 10 11 12 13 14 { :timestamp=>"2014-06-26T09:38:10.270000+0200", :message=>"Exception in filterworker", "exception"=>#<NoMethodError: undefined method `first' for "2014-06-26T07:38:10.262Z":Time>, "backtrace"=>[ "/dn-logstash-edi/product/logstash-1.4.1/lib/logstash/filters/multiline.rb:236:in `collapse_event!'", "/dn-logstash-edi/product/logstash-1.4.1/lib/logstash/filters/multiline.rb:211:in `filter'", "(eval):65:in `initialize'", "org/jruby/RubyProc.java:271:in `call'", "/dn-logstash-edi/product/logstash-1.4.1/lib/logstash/pipeline.rb:262:in `filter'", "/dn-logstash-edi/product/logstash-1.4.1/lib/logstash/pipeline.rb:203:in `filterworker'", "/dn-logstash-edi/product/logstash-1.4.1/lib/logstash/pipeline.rb:143:in `start_filters'" ], :level=>:error }

Environment

None

Status

Assignee

Logstash Developers

Reporter

Fabien Baligand

Labels

None

Affects versions

1.4.1 (bugfix only)

Priority