Logstash deployment in scale to check readiness and liveness probe

We need to tweak the liveness and readiness probe checks
For this I deploy one pod and tweak the readiness and liveness probe values ..But filebeat and syslogs are not flowing

I got below error
[ERROR][logstash.outputs.http ][syslog][a089ce0a15dad519557137d203fb4733f0762b1fa011f680d9dd2fdb95d6b82e] [HTTP Output Failure] Could not fetch URL {:url=>"?token=", :method=>:post, :message=>"Host name may not be null", :class=>"Java::JavaLang::IllegalArgumentException", :will_retry=>false}

What does your logstash pipeline configuration look like?