[JAVA] Format of the log output by Tomcat itself in Tomcat 8

** Notes on migrating from Tomcat 7 to Tomcat 8 **

change point

Log contents in Tomcat 7 + Java 6

`catalina.out`


2015/01/16 9:26:31 org.apache.catalina.core.StandardService startInternal
information:Start the service Catalina

Log contents in Tomcat 8 + Java 7

`catalina.out`


16-Jan-2015 9:26:31.518 INFO [main] org.apache.catalina.core.StandardService.startInternal service Starts Catalina

What was two lines has been changed to one line.

Back to 2 lines

To get this back to the original two lines, go to the following in conf / logging.properties

`conf/logging.properties`


java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter

By changing to the following, it becomes the same two lines as Tomcat 7. (OneLineFormatter-> SimpleFormatter)

`conf/logging.properties`


java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

This will display two lines as shown below.

`catalina.out`


1 15, 2015 12:06:25 pm org.apache.catalina.core.StandardService startInternal
information:Start the service Catalina

If you look closely, the date format has also changed

Until now, it was processed by format held in java.util.logging.SimpleFormatter, The format obtained from Java 7 with getSimpleFormat of sun.util.logging.LoggingSupport is used.

You can get the same contents as in Java 6 by adding the following to conf / logging.properties of Tomcat.

`conf/logging.properties`


java.util.logging.SimpleFormatter.format = %1$tY/%1$tm/%1$td %1$tk:%1$tM:%1$tS %2$s%n%4$s: %5$s%6$s%n

It's finally the same as Tomcat 7 + Java 6.

`catalina.out`


2015/01/16 9:26:31 org.apache.catalina.core.StandardService startInternal
information:Start the service Catalina

Supplementary information

Date format confirmation source

package jp.kajiken.format;

import java.text.MessageFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;

public class TestFormat {

	public static void main(String[] args) {
		//Date to test
		Calendar cal = new GregorianCalendar(2015, 0, 2, 8, 50, 59);
		Date dat = new Date(cal.getTimeInMillis());

		// Java6
		System.out.print(new MessageFormat("{0,date} {0,time}").format(new Object[]{dat}));
		System.out.println(" org.apache.catalina.core.StandardService startInternal");
		System.out.println("information:Start the service Catalina");
		System.out.println("---");

		// Java7
		System.setProperty("java.util.logging.SimpleFormatter.format",
				"%1$tY/%1$tm/%1$td %1$tk:%1$tM:%1$tS %2$s%n%4$s: %5$s%6$s%n");
		LogRecord log = new LogRecord(Level.INFO, "Start the service Catalina");
		log.setSourceClassName("org.apache.catalina.core.StandardService");
		log.setSourceMethodName("startInternal");
		log.setMillis(dat.getTime());
		SimpleFormatter sf = new SimpleFormatter();
		System.out.println(sf.format(log));
	}
}

Execution result

`stdout`


2015/01/02 8:50:59 org.apache.catalina.core.StandardService startInternal
information:Start the service Catalina
---
2015/01/02 8:50:59 org.apache.catalina.core.StandardService startInternal
information:Start the service Catalina

I was able to successfully reproduce the state before the transition. The reason I'm doing this is that there was an existing script that was processing using this string ...