TypeError: can't convert Hash into String

[YanivT (Yaniv Telem)]

[2019-08-12T10:57:09,072][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<TypeError: can't convert Hash into String>, :backtrace=>["org/jruby/RubyString.java:4462:in include?'", "(eval):6774:ininitialize'", "org/jruby/RubyArray.java:1613:in each'", "(eval):6772:ininitialize'", "org/jruby/RubyProc.java:281:in call'", "(eval):1426:infilter_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:398:in filter_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:379:inworker_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:342:in `start_workers'"]}

[Badger]

What does your configuration look like and what event is it processing?

[YanivT (Yaniv Telem)]

running on centos 7
which config file you referring to?

[Badger]

The configuration of whichever pipeline is getting that error.

[YanivT (Yaniv Telem)]

All the configuration are default

log shipping from logstash to logz.io
filbeat on logstash server collect the logs from all servers

[YanivT (Yaniv Telem)]

let me know please which config file i can show you...