java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email #652

belezi · 2020-10-20T20:42:38Z

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:

The text was updated successfully, but these errors were encountered:

thinkingserious · 2020-10-21T05:27:10Z

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.

DianeBustamante · 2020-10-27T13:06:57Z

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.

DianeBustamante · 2020-10-30T21:32:06Z

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>

zionc44 · 2020-11-20T23:01:17Z

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?

DianeBustamante · 2020-11-21T01:29:26Z

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.

zionc44 · 2020-11-21T17:07:19Z

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?

DianeBustamante · 2020-11-21T19:16:33Z

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.

zionc44 · 2020-11-21T19:33:26Z

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.

DianeBustamante · 2020-11-21T19:51:11Z

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.

priyav26 · 2021-01-28T06:41:54Z

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

kamalbahadur · 2021-03-16T21:57:02Z

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.

thinkingserious added status: help wanted requesting help from the community type: bug bug in the library labels Oct 21, 2020

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java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email #652

java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email #652

belezi commented Oct 20, 2020

thinkingserious commented Oct 21, 2020

DianeBustamante commented Oct 27, 2020

DianeBustamante commented Oct 30, 2020

zionc44 commented Nov 20, 2020

DianeBustamante commented Nov 21, 2020

zionc44 commented Nov 21, 2020

DianeBustamante commented Nov 21, 2020

zionc44 commented Nov 21, 2020

DianeBustamante commented Nov 21, 2020

priyav26 commented Jan 28, 2021

kamalbahadur commented Mar 16, 2021

java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email #652

java.lang.ClassNotFoundException: com.sendgrid.helpers.mail.objects.Email #652

Comments

belezi commented Oct 20, 2020

Issue Summary

Code Snippet

Code Snippet

Exception/Log

Technical details:

thinkingserious commented Oct 21, 2020

DianeBustamante commented Oct 27, 2020

DianeBustamante commented Oct 30, 2020

zionc44 commented Nov 20, 2020

DianeBustamante commented Nov 21, 2020

zionc44 commented Nov 21, 2020

DianeBustamante commented Nov 21, 2020

zionc44 commented Nov 21, 2020

DianeBustamante commented Nov 21, 2020

priyav26 commented Jan 28, 2021

kamalbahadur commented Mar 16, 2021