sendgrid
java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email
Issue Summary
On run time I always get classNotFoundException basically on every class from com.sendgrid package. Has anyone else run into this that could shed some light as to why this is happening? I am on the latest version 4.6.7
Any help is appreciated. TY
Code Snippet
import com...Notification;
import com...NotificationSendException;
import com...EmailNotificationClientInterface;
import com...NotificationResponse;
import com.sendgrid.Method;
import com.sendgrid.Request;
import com.sendgrid.Response;
import com.sendgrid.SendGrid;
import com.sendgrid.helpers.mail.Mail;
import com.sendgrid.helpers.mail.objects.Content;
import com.sendgrid.helpers.mail.objects.Email;
import java.io.IOException;
public class SendGridEmailNotificationService implements EmailNotificationClientInterface {
@Override
public NotificationResponse sendEmailNotification(Notification notification) throws NotificationSendException, IOException {
Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
Email from = new Email("[email protected]");
String subject = "Sending with SendGrid is Fun";
Email to = new Email("[email protected]");
Mail mail = new Mail(from, subject, to, content);
SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
Request request = new Request();
Response response = new Response();
try {
request.setMethod(Method.POST);
request.setEndpoint("mail/send");
request.setBody(mail.build());
response = sg.api(request);
if (response.getStatusCode() == 200) {
}
System.out.println(response.getStatusCode());
System.out.println(response.getBody());
System.out.println(response.getHeaders());
} catch (IOException ex) {
throw ex;
}
return this.processResponse(notification, response);
}
private NotificationResponse processResponse(Notification notification, Response response){
NotificationResponse notificationResponse = new NotificationResponse();
notificationResponse.setErred(notification.getErredNotification());
notificationResponse.setSent(!notification.getErredNotification());
return notificationResponse;
}
}
pom.xml file
Code Snippet
<dependency>
<groupId>com.sendgrid</groupId>
<artifactId>java-http-client</artifactId>
<version>4.3.6</version>
</dependency>
<dependency>
<groupId>com.sendgrid</groupId>
<artifactId>sendgrid-java</artifactId>
<version>4.6.7</version>
</dependency>
Exception/Log
ERROR [2020-10-20 20:35:24,287] io.dropwizard.jersey.errors.LoggingExceptionMapper: Error handling a request: 98ade0ddcde6ee9c
! java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Content
! at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
! at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
! at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
! ... 64 common frames omitted
! Causing: java.lang.NoClassDefFoundError: com/sendgrid/helpers/mail/objects/Content
Technical details:
- sendgrid-java version: 4.6.7
- java version:
Thank you for reporting this @belezi!
I was able to recreate in the following manner:
mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false
Added the dependencies to pom.xml:
<dependency>
<groupId>com.sendgrid</groupId>
<artifactId>java-http-client</artifactId>
<version>4.3.6</version>
</dependency>
<dependency>
<groupId>com.sendgrid</groupId>
<artifactId>sendgrid-java</artifactId>
<version>4.6.7</version>
</dependency>
Added the following code to App.java:
package com.mycompany.app;
import com.sendgrid.SendGrid;
import com.sendgrid.helpers.mail.Mail;
import com.sendgrid.helpers.mail.objects.Email;
import com.sendgrid.helpers.mail.objects.Content;
import com.sendgrid.Request;
import com.sendgrid.Response;
import com.sendgrid.Method;
import java.io.IOException;
/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args ) throws IOException {
Email from = new Email("[email protected]");
String subject = "Sending with Twilio SendGrid is Fun";
Email to = new Email("[email protected]");
Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
Mail mail = new Mail(from, subject, to, content);
SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
Request request = new Request();
try {
request.setMethod(Method.POST);
request.setEndpoint("mail/send");
request.setBody(mail.build());
Response response = sg.api(request);
System.out.println(response.getStatusCode());
System.out.println(response.getBody());
System.out.println(response.getHeaders());
} catch (IOException ex) {
throw ex;
}
}
}
cd my-app
mvn package
java -cp target/my-app-1.0-SNAPSHOT.jar com.mycompany.app.App
This issue has been added to our internal backlog to be prioritized. Pull requests and +1s on the issue summary will help it move up the backlog.
I am having the exact same issue. This needs to be resolved ASAP in order to comply with SendGrid migrating away from username/password to API Keys.
NOTE: I was able to get this to work by updating the <build> section of my pom.xml file. I started with a pom file from a simple archetype. I updated it with the following <build> section:
<build>
<plugins>
<plugin>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<createDependencyReducedPom>true</createDependencyReducedPom>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.sgtest.SendGridTest2.App</mainClass>
</transformer>
</transformers>
<!-- exclude signed Manifests -->
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.6</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.sgtest.SendGridTest2.App</mainClass>
</manifest>
<manifestEntries>
<Class-Path>./public/</Class-Path>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
I am having the exact same issue but I am not using maven, I was just downloading the JAR file and on run time I always get classNotFoundException basically on every class from com.sendgrid package.
Is there any solution for me?
I was able to get this example to work without maven by including two libraries: sendgrid-java-4.6.7.jar and java-http-client-latest.jar. I believe I downloaded the sendgrid-java-4.6.7.jar from the Maven repository. A link to java-http-client-latest.jar can be found at https://github.com/sendgrid/sendgrid-java. I believe you also need to include three jackson libraries: jackson-annotation-2.9.0.jar, jackson-core-2.9.2.jar and jackson-databind-2.9.2.jar. I hope this helps.
I was able to get this example to work without maven by including two libraries: sendgrid-java-4.6.7.jar and java-http-client-latest.jar. I believe I downloaded the sendgrid-java-4.6.7.jar from the Maven repository. A link to java-http-client-latest.jar can be found at https://github.com/sendgrid/sendgrid-java. I believe you also need to include three jackson libraries: jackson-annotation-2.9.0.jar, jackson-core-2.9.2.jar and jackson-databind-2.9.2.jar. I hope this helps.
Thanks, I have download sendgrid-java-4.6.7.jar and all the dependencies JAR base on the docs at maven repository at the https://mvnrepository.com/artifact/com.sendgrid/sendgrid-java/4.6.7 but still getting the same runtime classNotFoundException for any class from com.sendgrid.
any other idea?
I did not use the java-http-client library from the maven repository. As I stated above, I went to https://github.com/sendgrid/sendgrid-java and followed the java-http-client link on that page. It led me to the jar named java-http-client-latest.jar. Try that.
I did not use the java-http-client library from the maven repository. As I stated above, I went to https://github.com/sendgrid/sendgrid-java and followed the java-http-client link on that page. It led me to the jar named java-http-client-latest.jar. Try that.
thanks again, I have tried but still i am keeping getting the Class Not Found Exception.
I don't know what else to tell you. I am using java 1.8, specifically jre.1.8.0_271. Don't know if that could impact your build.
Any solution for this? I am facing the same problem. I tried to execute it through eclipse ide (Gradle). I get the below exception
Exception in thread "main" java.lang.NoClassDefFoundError: com/sendgrid/Email at SendGridEmailer.main(SendGridEmailer.java:10) Caused by: java.lang.ClassNotFoundException: com.sendgrid.Email at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ... 1 more
I had the same issue. For me, the problem was that maven was pulling older version of sendgrid-java even though 4.7.2 was the transitive dependency. So the fix was to add the dependency 4.7.2 directly in pom.xml and not depend on transitive dependency.
