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    Nagios Error - HTTP CRITICAL - Unable to open TCP socket

    Nagios Error - HTTP CRITICAL - Unable to open TCP socket


    Nagios Error
    Error:
    Connection refused
    HTTP CRITICAL - Unable to open TCP socket



    Solution: 


    1. Define the port with -p option rather than giving it in URL:

    vi checkcommands.cfg

    define command {
    command_name                   check_http_solr
    command_line                   $USER1$/check_http -H '$ARG1$' -u '$ARG2$' -p '$ARG3$'
    }

    2. Edit services file.

    vi services.cfg
    define service {
    host_name                      example
    service_description            URL Check
    is_volatile                    0
    check_period                   24x7
    max_check_attempts             5
    normal_check_interval          10
    retry_check_interval           1
    contact_groups                 hotline
    notification_interval          120
    notification_period            24x7
    notification_options           c,r
    check_command                  check_http_solr!example!http://example.local/solr/index/admin/ping?wt=json!8983
    notifications_enabled          1
    }

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