Anything wrong with the way I use log4j2 that I can't get the debug output of my javamail?

[tangara goh]

I am trying to debug what is wrong with my java mail which I tried to send using gmail and in localhost my own computer without a web host.

Now, I have log4j2 and log4j inside so I am not sure if I should remove log4j.  

Also, I just want to log to console to see the error:

Here's my log4j2.xml :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

	<Configuration status="DEBUG">

		<Appenders>
			<Console name="LogToConsole" target="SYSTEM_OUT">
				<PatternLayout
					pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
			</Console>
		</Appenders>
		<Loggers>
			<!-- avoid duplicated logs with additivity=false -->
			<Logger name="business" level="debug" additivity="false">
				<AppenderRef ref="LogToConsole" />
			</Logger>
			<Root level="error">
				<AppenderRef ref="LogToConsole" />
			</Root>
		</Loggers>
	</Configuration>

Here's my log4j properties file configuration:

status = fatal
name = PropertiesConfig
 
filters = threshold
 
filter.threshold.type = ThresholdFilter
filter.threshold.level = debug
 
appenders = console
 
appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Console appender. (this is added on 7 Mar 2019)
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d [%t] %-5p %c - %m%n
 
rootLogger.level = fatal
rootLogger.appenderRefs = stdout
rootLogger.appenderRef.stdout.ref = STDOUT

# Root logger (this is added on 7 Mar 2019)
# console will log to console (local tomcat) or stdout.log im Tomcat/logs
log4j.rootLogger=ALL, console


# Root logger option 
log4j.rootLogger=INFO, stdout
 
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Define the root logger with file appender
log4j.rootLogger = fatal, sql

# Define the file appender
log4j.appender.sql=org.apache.log4j.jdbc.JDBCAppender

log4j.appender.sql.URL="jdbc:postgresql://localhost:5432/membership";
log4j.appender.sql.driver="org.postgresql.Driver";
# Set database user name and password
log4j.appender.sql.user=postgres
log4j.appender.sql.password=xxx
# Set the SQL statement to be executed.
log4j.appender.sql.layout=org.apache.log4j.PatternLayout

 
log4j.additivity.jdbc.sqlonly=false
log4j.additivity.jdbc.sqltiming=false
log4j.additivity.jdbc.audidt=false
log4j.additivity.jdbc.resultset=false
log4j.additivity.jdbc.connection=false
log4j.additivity.jdbc.resultsettable=false
 
! the appender used for the JDBC API layer call logging above, sql only

<configuration>
    <appender name="CONSOLE" class="MySQLConstants.class.ConsoleAppender">
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss}|${HOSTNAME}|%contextName|%-5level|%msg ||%class:%line %n</pattern>
        </encoder>
    </appender>
    <!-- the console defaults to INFO level-->
    <root level="INFO">
        <appender-ref ref="CONSOLE"/>
    </root>
</configuration>

And I have further add the SMTP tracing to logging at Tomcat

com.sun.mail.smtp.SMTPTransport.level = CONFIG
com.sun.mail.smtp.level = CONFIG
com.sun.mail.level = CONFIG
com.sun.mail.util.MailLogger.level = CONFIG
javax.mail.Session.level = CONFIG
javax.mail.level = CONFIG

BUT, I am not getting any error output

And still I can't send out my email or any debug error

public class sendMail() {

private static final org.apache.logging.log4j.Logger logger = org.apache.logging.log4j.LogManager
            .getLogger(sendMail.class);
    private Connection conn;
    private PreparedStatement ps = null;

public String findEmail() { // all the connectivity is leave out for simplicity
		/
		// Assuming you are sending email from localhost
		try {

			Class.forName("org.postgresql.Driver");
			
-			
	System.out.println("your email is " + strEmail);
				logger.debug(strEmail);
			}
		} catch (SQLException | ClassNotFoundException e) {
			
		}
		return strEmail;
	}

private void init() throws MessagingException {
		Properties properties = new Properties();
		properties.put("mail.imap.ssl.enable", "true"); // required for Gmail
		properties.put("mail.imap.auth.mechanisms", "XOAUTH2");
		Session session = Session.getInstance(properties);
		Store store = session.getStore("imap");
		store.connect("imap.gmail.com", "[e-mail]" , "api key");
		//Properties properties = new Properties();
		properties.setProperty("mail.smtp.host", "smtp.gmail.com");
		properties.put("mail.smtp.port", 465);// for SSL
		properties.put("mail.smtp.auth", true);
		properties.put("mail.smtp.starttls.enable", true);
		properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
		session.setDebug(true);
		session = Session.getInstance(properties, new javax.mail.Authenticator() {
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication(username, password);
			}
		});
	}



public void sendEmail(String strEmail) throws MessagingException {
        init();

        strEmail = findEmail();
      System.out.println("Email of user : " + strEmail);
        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("[e-mail]"));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(strEmail));
            logger.debug(findEmail());
            logger.info("Sending verify email to {} for {}", findEmail());
            message.setSubject("Thank you for registering with us");
            message.setContent("You have successfully registered", "text/html; charset=utf-8");
            // Send message
            Transport.send(message);
            System.out.println("Mail successfully sent");
            } catch (MessagingException mex) {
       
            }
    }

Please. I hope someone can help me on this.

[Matt Wong]

this code doesn't compile

- classname ends with parenthesis
- session is defined only inside init() but tried to use in sendMail(String) where it's no longer valid
- wrong port - TCP/465 is socket level TLS - StartTLS is for TCP/25 and TCP/587 only
- modern Type 4 JDBC driver no longer need Class.forName() but will be auto-loaded by serviceloader as long it's in classpath at jvm startup time

[Tim Holloway]

Also, I'm pretty sure that A) Log4j and Log4j2 are mutually exclusive, B) Log4j2 has completely obsoleted log4j C) the log4j2 XML configuration file's default name is simply "log4j.xml".

Consult the documentation, but, as I said, I'm reasonably sure of the above.

[tangara goh]

Matt Wong wrote:this code doesn't compile

- classname ends with parenthesis
- session is defined only inside init() but tried to use in sendMail(String) where it's no longer valid
- wrong port - TCP/465 is socket level TLS - StartTLS is for TCP/25 and TCP/587 only
- modern Type 4 JDBC driver no longer need Class.forName() but will be auto-loaded by serviceloader as long it's in classpath at jvm startup time

Thanks for the pointers.

I have since corrected the code.  Basically, I just copied and pasted someone else code whom I thought was working...

However, after including the init portion onto the sendEmai(String) method, I am still getting a null point exception at the line which starts with Store

properties.put("mail.debug", "true");
		session.setDebug(true);
		Store store = session.getStore("imap"); //null pointer exception

Why am I getting a null pointer exception in this case.

Furthermore, after removing log4j.properties and now there is only log4j2.xml, I am still not getting any log4j debug output...

Not sure if there is anything wrong with the below log4j2.xml ? (Note: I have changed it to log4j.xml)

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appenders>
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss} [%t] %-5level %c{1} - %msg%n" />
        </Console>
    </appenders>

        <Root level="all">
            <AppenderRef ref="console" />
        </Root>
    
</configuration>

Thanking you in advance for your advance.