Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash. org.jruby.exceptions.ArgumentError: (ArgumentError) key cannot be blank

Plz kindly help

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Okay. Sure

My logstash is getting stopped by here. can someone plz help why this error is coming

warning: thread "[connection]>worker2" terminated with exception (report_on_exception is true):
java.lang.IllegalStateException: org.jruby.exceptions.ArgumentError: (ArgumentError) key cannot be blank
at org.logstash.execution.WorkerLoop.run(org/logstash/execution/WorkerLoop.java:85)
at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)
at org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:440)
at org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:304)
at RUBY.start_workers(/opt/turquoise/collector/logstash-core/lib/logstash/java_pipeline.rb:239)
at org.jruby.RubyProc.call(org/jruby/RubyProc.java:295)
at org.jruby.RubyProc.call(org/jruby/RubyProc.java:274)
at org.jruby.RubyProc.call(org/jruby/RubyProc.java:270)
at java.lang.Thread.run(java/lang/Thread.java:748)
Caused by: org.jruby.exceptions.ArgumentError: (ArgumentError) key cannot be blank
at opt.turquoise.collector.vendor.bundle.jruby.$2_dot_5_dot_0.gems.dalli_minus_2_dot_7_dot_10.lib.dalli.client.validate_key(/opt/turquoise/collector/vendor/bundle/jruby/2.5.0/gems/dalli-2.7.10/lib/dalli/client.rb:378)

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