Cannot make regex to deliver a record

[venkatSakhi]

// sample log -> [airflowwebserver] [qa] [2019-09-08T19:40:06.087+00:00] {jobs.py:1559} INFO - Harvesting DAG parsing results

agent.json

{
  "cloudwatch.emitMetrics": true,
  "cloudwatch.endpoint": "monitoring.eu-west-1.amazonaws.com",
  "firehose.endpoint": "firehose.eu-west-1.amazonaws.com",
  "kinesis.endpoint": "https://kinesis.eu-west-1.amazonaws.com",
  "flows": [
    {
      "filePattern": "/var/log/containers/*.log",
      "kinesisStream": "prod-application-logs",
      "dataProcessingOptions": [
        {
          "optionName": "LOGTOJSON",
          "logFormat": "SYSLOG",
          "matchPattern": "\\[(\\w+)\\]\\s\\[\\w+\\]\\s\\[(.+)\\]\\s\\{.+\\}\\s(.+)\\s-(.+)",
          "customFieldNames": ["service", "@timestamp", "severity", "message"]
        }
      ]
    }
  ],
  "log.level": "INFO"
}

[venkatSakhi]

Code to check the regex:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HelloWorld{

     public static void main(String []args){
         String regex = "\\[(\\w+)\\]\\s\\[\\w+\\]\\s\\[(.+)\\]\\s\\{.+\\}\\s(.+)\\s-(.+)";
         String string = "[pi_airflow_webserver] [qa] [2019-09-08T19:40:06.087+00:00] {jobs.py:1559} INFO - Harvesting DAG parsing results"; 
          Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
 Matcher matcher = pattern.matcher(string);
 while (matcher.find()) {
    System.out.println("Full match: " + matcher.group(0));
    for (int i = 1; i <= matcher.groupCount(); i++) {
        System.out.println("Group " + i + ": " + matcher.group(i));
    }
}

     }
}