我正在学习ELK堆栈。所以我写了一个java代码的例子，在一个文件中产生一些日志行。我试图看看日志行是否在Kibana UI中显示。所以我会尽我所能解释我所做的。所以我首先启动elasticsearch，然后logstash，然后Kibana。
我的logstash配置文件如下所示：

input {
    file {
    type => "java"
    path => "C:/temp/logs/application.log"
    codec => multiline {
        pattern => "^%{MONTHDAY}/%{MONTHNUM}/%{YEAR} %{TIME}.*"
        negate => "true"
        what => "previous"
    }
  }
}

filter {

    grok {  
        match => { "message" => "%{DATE_EU:date} %{TIME:time} %{ISO8601_TIMEZONE:zone} \[%{LOGLEVEL:loglevel}.*] \[%{DATA:thread}] %{DATA:class} - %{GREEDYDATA:message}" }
        add_tag => [ "log" ]
    }
}

output {
    
    stdout {
        codec => rubydebug
    }
    
    # Sending properly parsed log events to elasticsearch
    elasticsearch {
        hosts => ["localhost:9200"]
    }
}

日志文件中的日志如下所示：

07/06/2022 14:37:41.471 +0530 [ERROR] [main] com.cmt.ncaas.logging.LoggingTrial - Trying to log an error
07/06/2022 14:37:41.471 +0530 [DEBUG] [main] com.cmt.ncaas.logging.LoggingTrial - Trying to log an debug
07/06/2022 14:37:41.471 +0530 [TRACE] [main] com.cmt.ncaas.logging.LoggingTrial - Trying to log an trace
07/06/2022 14:37:41.471 +0530 [WARN ] [main] com.cmt.ncaas.logging.LoggingTrial - Trying to log an warn
07/06/2022 14:37:41.471 +0530 [ERROR] [main] com.cmt.ncaas.logging.LoggingTrial - Exception occured: 
java.lang.ArithmeticException: / by zero
    at com.cmt.ncaas.logging.LoggingTrial.exceptionLogging(LoggingTrial.java:39)
    at com.cmt.ncaas.logging.LoggingTrial.main(LoggingTrial.java:32)

在此之后，我创建了一个模式为logs-*的索引模板。但我没有看到任何东西显示在Kibana中。
你能告诉我我哪里出错了吗？我怀疑是输入部分把它搞砸了。但是我是这么新，我不确定我能改变什么。
任何指点，我非常感激。提前感谢。