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Simple Log4J Yahoo mail setup to recieve production errors as emails

Receive all server exceptions as email, never miss one, easy to share and discuss with the others

Follow these simple steps to configure Log4j to use Yahoo mail.

Step 1: Add dependencies

        <!-- Log4j -->

Step 2: Sample logging file, inline comments are self explanatory
        file linke :

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
    <log4j:configuration xmlns:log4j="">
        <!-- Appends events to console : compliments SMTPAppender -->
        <appender name="Console" class="org.apache.log4j.ConsoleAppender">
            <layout class="org.apache.log4j.PatternLayout">
                <param name="ConversionPattern" value="[${name}] - %d{ISO8601} - %X{login} - %m%n" />

        <!-- will only sends error events -->
        <appender name="Email" class="">
            <param name="BufferSize" value="1" /> <!-- default is 512, changed for test cases to work -->
            <param name="SMTPProtocol" value="smtps" /> <!-- log4j 1.2.16 is required -->
            <param name="SMTPHost" value="" />
            <param name="SMTPPort" value="465" />
            <param name="SMTPUsername" value="" /> <!-- -->
            <param name="from" value="" /> <!-- required -->
            <param name="SMTPPassword" value="" /> <!-- passowrd -->
            <param name="To" value="" /> <!-- required -->
            <param name="Subject" value=" Error Log" />
            <layout class="org.apache.log4j.PatternLayout">
                <param name="ConversionPattern" value="[${name}] - %d{ISO8601} - %X{login} - %m%n" />

        <appender name="EMAIL_ASYNC" class="org.apache.log4j.AsyncAppender">
            <param name="BufferSize" value="1"/>
            <appender-ref ref="Email"/>

            <priority value="trace" />
            <!-- use Email appender for local test to pass -->
            <appender-ref ref="EMAIL_ASYNC" />
            <appender-ref ref="Console" />


Sample Code

    import org.apache.log4j.Logger;

    public class App {

        private static Logger logger = Logger.getLogger(App.class);

        public static void main(String[] args) throws InterruptedException {

            logger.trace("trace message");

            logger.warn("warn message");

            // only error msgs will be emailed
            logger.error("error message, a very long error message!");


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Alex Gold said…
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