java.lang.NoSuchMethodError: com.sun.mail.util.TraceInputStream

I’m trying to send an email through Java Mail API and it works fine on my laptop. When I’m doing exactly the same in Heroku, I’m getting this:

java.lang.NoSuchMethodError: com.sun.mail.util.TraceInputStream.(Ljava/io/InputStream;Lcom/sun/mail/util/MailLogger;)V
    at com.sun.mail.smtp.SMTPTransport.initStreams(SMTPTransport.java:2014)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1936)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
    at javax.mail.Service.connect(Service.java:291)
    at ...

Here is what I have in pom.xml:

    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mailapi</artifactId>
        <version>1.4.3</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.mail</groupId>
        <artifactId>javax.mail</artifactId>
        <version>1.5.3</version>
        <scope>runtime</scope>
    </dependency>

I guess there is another version of Java Mail API inside Heroku JDK, which doesn’t have this constructor… How can this be fixed?

Answer

By default, Java apps running on latest Heroku stack use OpenJDK 8.

Your problem does not seems related to the actual JVM implementation but rather due to the missing smtp-1.5.1.jar in classpath . To be sure to load correctly TraceInputStream try this :

java.net.URL classUrl = this.getClass().getResource("com.sun.mail.util.TraceInputStream");
out.println(classUrl.getFile());