Vaadin 24.4.6 -> Crash during copilot initialization

[Charles-Edouard (Charles-Edouard Ruault)]

I’ve just upgraded from Vaadin 24.3.15 to 24.4.6.
When I build in development mode, I have the following exceptions in the logs :

Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.vaadin.copilot.userinfo.UserInfoRequest and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
	at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
	at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1191)
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:404)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:4094)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3404)
	at com.vaadin.copilot.CopilotServerClient.writeAsJsonString(CopilotServerClient.java:54)

and later:

[http-nio-8080-exec-4] WARN org.atmosphere.websocket.DefaultWebSocketProcessor - Failed invoking AtmosphereFramework.doCometSupport()
java.lang.NullPointerException: Cannot invoke "java.util.List.iterator()" because "this.commands" is null
	at com.vaadin.copilot.Copilot.handleMessage(Copilot.java:124)
	at com.vaadin.base.devserver.DebugWindowConnection.onMessage(DebugWindowConnection.java:321)
	at com.vaadin.flow.server.communication.PushHandler.handleDebugWindowMessage(PushHandler.java:650)
	at com.vaadin.flow.server.communication.PushHandler.callWithServiceAndSession(PushHandler.java:227)
	at com.vaadin.flow.server.communication.PushHandler.onMessage(PushHandler.java:626)
	at com.vaadin.flow.server.communication.PushAtmosphereHandler.onMessage(PushAtmosphereHandler.java:90)
	at com.vaadin.flow.server.communication.PushAtmosphereHandler.onRequest(PushAtmosphereHandler.java:79)
	at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:217)
	at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:103)
	at org.atmosphere.container.Servlet30CometSupport.service(Servlet30CometSupport.java:67)
	at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:2284)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:574)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.lambda$dispatch$2(DefaultWebSocketProcessor.java:326)
	at org.atmosphere.util.VoidExecutorService.execute(VoidExecutorService.java:101)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:323)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:428)
	at org.atmosphere.container.JSR356Endpoint.lambda$onOpen$2(JSR356Endpoint.java:261)
	at org.apache.tomcat.websocket.WsFrameBase.sendMessageText(WsFrameBase.java:390)
	at org.apache.tomcat.websocket.server.WsFrameServer.sendMessageText(WsFrameServer.java:130)
	at org.apache.tomcat.websocket.WsFrameBase.processDataText(WsFrameBase.java:484)
	at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:284)
	at org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:130)
	at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:85)
	at org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:184)
	at org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:164)
	at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:152)
	at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:60)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:57)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:894)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1740)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
[http-nio-8080-exec-4] WARN org.atmosphere.websocket.protocol.SimpleHttpProtocol - java.lang.NullPointerException: Cannot invoke "java.util.List.iterator()" because "this.commands" is null. Unable to deliver the websocket messages to installed component. Status 500 Message Server Error

It appears that it causes the usal “vaddin icon” displayed on the bottom right of the web-app not to be displayed.

At first I had other issues causing compilation failure. I did solve them by adding :

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.17.2</version>
        </dependency>

in my pom.xml file.
Did I miss something else ? Can anyone help me solving this issue ?
thanks.

[knoobie (Christian Knoop)]

Sounds like you have some unusual pom setup. Posting your pom might help us to understand what’s wrong in your setup.

[Charles-Edouard (Charles-Edouard Ruault)]

Hi, thanks for the reply.
Here’s the pom:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>mygroup</groupId>
    <artifactId>myapp</artifactId>
    <packaging>war</packaging>
    <version>2.0.65</version>
    <name>myapp</name>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <vaadin.version>24.4.6</vaadin.version>
        <drivers.downloader.phase>pre-integration-test</drivers.downloader.phase>
        <jetty.version>12.0.0</jetty.version>
    </properties>

    <repositories>
        <!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->
        <repository>
          <id>central</id>
           <url>https://repo.maven.apache.org/maven2</url>
           <snapshots>
               <enabled>false</enabled>
           </snapshots>
       </repository>
        <repository>
            <id>maven</id>
            <url>https://maven.apache.org/</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>

        <repository>
            <id>vaadin-prereleases</id>
            <url>
                https://maven.vaadin.com/vaadin-prereleases/
            </url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <!-- Repository used by many Vaadin add-ons -->
        <repository>
            <id>Vaadin Directory</id>
            <url>https://maven.vaadin.com/vaadin-addons</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->
        <pluginRepository>
            <id>central</id>
            <url>https://repo.maven.apache.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>vaadin-prereleases</id>
            <url>
                https://maven.vaadin.com/vaadin-prereleases/
            </url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-bom</artifactId>
                <type>pom</type>
                <scope>import</scope>
                <version>${vaadin.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin</artifactId>
        </dependency>
        <!-- Added to provide logging output as Vaadin uses -->
        <!-- the unbound SLF4J no-operation (NOP) logger implementation -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
        </dependency>
        <dependency>
            <groupId>jakarta.servlet</groupId>
            <artifactId>jakarta.servlet-api</artifactId>
            <version>6.0.0</version>
        </dependency>
        <dependency>
            <groupId>jakarta.annotation</groupId>
            <artifactId>jakarta.annotation-api</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-testbench</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-charts-flow</artifactId>
        </dependency>
        <dependency>
            <groupId>com.xdev-software</groupId>
            <artifactId>vaadin-maps-leaflet-flow</artifactId>
            <version>2.0.5-CER_SM</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
        <dependency>
            <groupId>io.github.bonigarcia</groupId>
            <artifactId>webdrivermanager</artifactId>
            <version>5.1.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-text</artifactId>
            <version>1.10.0</version>
        </dependency>
		<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.17.2</version>
        </dependency>
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sendgrid/sendgrid-java -->
		<dependency>
			<groupId>com.sendgrid</groupId>
			<artifactId>sendgrid-java</artifactId>
			<version>4.4.8</version>
		</dependency>
        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>com.sun.activation</groupId>
            <artifactId>jakarta.activation</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.15.3</version>
        </dependency>
        <dependency>
            <groupId>org.parttio</groupId>
            <artifactId>line-awesome</artifactId>
            <version>1.1.0</version>
        </dependency>
    </dependencies>

    <build>
        <defaultGoal>jetty:run</defaultGoal>
        <plugins>
            <!-- Define newer versions of Java compiler and war plugin to 
                 better support latest JDK versions. -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.1</version>
                <configuration>
                <webResources>
                    <resource>
                        <directory>src/main</directory>
                        <!-- override the destination directory for this resource -->
                        <targetPath>WEB-INF</targetPath>
                        <!-- enable filtering -->
                        <filtering>true</filtering>
                        <includes>
                            <include>web.xml</include>
                        </includes>
                    </resource>
                </webResources>
                </configuration>
            </plugin>
            <!-- Jetty plugin for easy testing without a server -->
            <plugin>
                <groupId>org.eclipse.jetty.ee10</groupId>
                <artifactId>jetty-ee10-maven-plugin</artifactId>
                <version>${jetty.version}</version>
                <configuration>
                    <!-- If using IntelliJ IDEA with autocompilation, this
                    might cause lots of unnecessary compilations in the
                    background.-->
                    <!--
                    <scanIntervalSeconds>2</scanIntervalSeconds>-->
                    <!-- Use war output directory to get the webpack files -->
                    <webAppConfig>
                        <allowDuplicateFragmentNames>true</allowDuplicateFragmentNames>
                    </webAppConfig>
                </configuration>
            </plugin>

            <!--
                Take care of synchronizing java dependencies and imports in
                package.json and main.js files.
                It also creates webpack.config.js if not exists yet.
            -->
            <plugin>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <version>${vaadin.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-frontend</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>run</id>
            <properties>
                <vaadin.productionMode>false</vaadin.productionMode>
                <prod_mode>false</prod_mode>
                <app_version>${project.version}-test</app_version>
            </properties>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                    </plugin>
                </plugins>
            </build>
        </profile>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>production</id>
            <properties>
                <vaadin.productionMode>true</vaadin.productionMode>
                <app_version>${project.version}-prod</app_version>
                <prod_mode>true</prod_mode>
            </properties>

            <dependencies>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>flow-server-production-mode</artifactId>
                </dependency>
            </dependencies>

            <build>
                <plugins>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>build-frontend</goal>
                                </goals>
                                <phase>compile</phase>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>

        <profile>
            <id>it</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.eclipse.jetty</groupId>
                        <artifactId>jetty-maven-plugin</artifactId>
                        <version>${jetty.version}</version>
                        <configuration>
                            <scanIntervalSeconds>0</scanIntervalSeconds>
                            <stopPort>8081</stopPort>
                            <stopWait>5</stopWait>
                            <stopKey>${project.artifactId}</stopKey>
                        </configuration>
                        <executions>
                            <execution>
                                <id>start-jetty</id>
                                <phase>pre-integration-test</phase>
                                <goals>
                                    <goal>deploy-war</goal>
                                </goals>
                            </execution>
                            <execution>
                                <id>stop-jetty</id>
                                <phase>post-integration-test</phase>
                                <goals>
                                    <goal>stop</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>

                    <!-- Runs the integration tests (*IT) after the server is started -->
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-failsafe-plugin</artifactId>
                        <version>2.22.2</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>integration-test</goal>
                                    <goal>verify</goal>
                                </goals>
                            </execution>
                        </executions>
                        <configuration>
                            <trimStackTrace>false</trimStackTrace>
                            <enableAssertions>true</enableAssertions>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

[knoobie (Christian Knoop)]

Oh… Jakarta… that explains it. Take a look at the example project from here to setup some exclusions: skeleton-starter-flow-cdi/pom.xml at v24 · vaadin/skeleton-starter-flow-cdi · GitHub

@Matti fyi You are not alone

Edit: this could get you some insides what’s happening Streamlined Vaadin Flow setup for V24.4 | Vaadin

[Charles-Edouard (Charles-Edouard Ruault)]

Thanks for the links. I’ve “streamlined” my setup a bit (removed hilla and copilot) but I’m still getting an exception related to DebugWindowConnection during app launch :

[http-nio-8080-exec-2] ERROR com.vaadin.base.devserver.DebugWindowConnection - Error sending message
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.vaadin.base.devserver.ServerInfo$NameAndVersion and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.vaadin.base.devserver.DebugWindowMessage["data"]->com.vaadin.base.devserver.ServerInfo["versions"]->java.util.ArrayList[0])
	at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
	at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1191)
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:404)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContentsUsing(IndexedListSerializer.java:142)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.java:88)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:79)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:18)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:722)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:166)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:722)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:166)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:4094)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3404)
	at com.vaadin.base.devserver.DebugWindowConnection.send(DebugWindowConnection.java:222)
	at com.vaadin.base.devserver.DebugWindowConnection.handleConnect(DebugWindowConnection.java:210)
	at com.vaadin.base.devserver.DebugWindowConnection.onConnect(DebugWindowConnection.java:187)
	at com.vaadin.flow.server.communication.PushHandler.lambda$onConnect$3(PushHandler.java:605)
	at java.base/java.util.Optional.ifPresent(Optional.java:178)
	at com.vaadin.flow.server.communication.PushHandler.lambda$onConnect$4(PushHandler.java:604)
	at com.vaadin.flow.server.communication.PushHandler.callWithServiceAndSession(PushHandler.java:227)
	at com.vaadin.flow.server.communication.PushHandler.onConnect(PushHandler.java:601)
	at com.vaadin.flow.server.communication.PushAtmosphereHandler.onConnect(PushAtmosphereHandler.java:103)
	at com.vaadin.flow.server.communication.PushAtmosphereHandler.onRequest(PushAtmosphereHandler.java:77)
	at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:217)
	at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:103)
	at org.atmosphere.container.Servlet30CometSupport.service(Servlet30CometSupport.java:67)
	at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:2284)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:574)
	at org.atmosphere.websocket.DefaultWebSocketProcessor.open(DefaultWebSocketProcessor.java:213)
	at org.atmosphere.container.JSR356Endpoint.onOpen(JSR356Endpoint.java:254)

The new pom.xml is :

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>mygroup</groupId>
    <artifactId>myapp</artifactId>
    <packaging>war</packaging>
    <version>2.0.65</version>
    <name>myapp</name>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <vaadin.version>24.4.6</vaadin.version>
        <drivers.downloader.phase>pre-integration-test</drivers.downloader.phase>
        <jetty.version>12.0.0</jetty.version>
    </properties>

    <repositories>
        <!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->
        <repository>
          <id>central</id>
           <url>https://repo.maven.apache.org/maven2</url>
           <snapshots>
               <enabled>false</enabled>
           </snapshots>
       </repository>
        <repository>
            <id>maven</id>
            <url>https://maven.apache.org/</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>

        <repository>
            <id>vaadin-prereleases</id>
            <url>
                https://maven.vaadin.com/vaadin-prereleases/
            </url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <!-- Repository used by many Vaadin add-ons -->
        <repository>
            <id>Vaadin Directory</id>
            <url>https://maven.vaadin.com/vaadin-addons</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->
        <pluginRepository>
            <id>central</id>
            <url>https://repo.maven.apache.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>vaadin-prereleases</id>
            <url>
                https://maven.vaadin.com/vaadin-prereleases/
            </url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-bom</artifactId>
                <type>pom</type>
                <scope>import</scope>
                <version>${vaadin.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin</artifactId>
            <!-- This exclusion can be in vaadin-spring-boot-starter if you don't
                have this (obsolete) dependency
            -->
            <exclusions>
                <exclusion>
                    <groupId>com.vaadin</groupId>
                    <artifactId>copilot</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.vaadin</groupId>
                    <artifactId>hilla-dev</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.vaadin</groupId>
                    <artifactId>flow-react</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- Added to provide logging output as Vaadin uses -->
        <!-- the unbound SLF4J no-operation (NOP) logger implementation -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
        </dependency>
        <dependency>
            <groupId>jakarta.servlet</groupId>
            <artifactId>jakarta.servlet-api</artifactId>
            <version>6.0.0</version>
        </dependency>
        <dependency>
            <groupId>jakarta.annotation</groupId>
            <artifactId>jakarta.annotation-api</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-testbench</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-charts-flow</artifactId>
        </dependency>
        <dependency>
            <groupId>com.xdev-software</groupId>
            <artifactId>vaadin-maps-leaflet-flow</artifactId>
            <version>2.0.5-CER_SM</version>
            <!-- remove when pull-request has been accepted & new version released -->
            <!--<version>1.1.1-cer</version>-->
            <!-- Install file into local Maven repo :
            /opt/apache-maven-3.8.6/bin/mvn install:install-file \
            -Dfile=`pwd`/vaadin-maps-leaflet-flow-1.1.1-cer.jar \
            -DgroupId=com.xdev-software \
            -DartifactId=vaadin-maps-leaflet-flow \
            -Dversion=1.1.1-cer \
            -Dpackaging=jar \
            -DgeneratePom=true
            -->
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
        <dependency>
            <groupId>io.github.bonigarcia</groupId>
            <artifactId>webdrivermanager</artifactId>
            <version>5.1.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.7.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-text</artifactId>
            <version>1.10.0</version>
        </dependency>
		<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.17.2</version>
        </dependency>
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sendgrid/sendgrid-java -->
		<dependency>
			<groupId>com.sendgrid</groupId>
			<artifactId>sendgrid-java</artifactId>
			<version>4.4.8</version>
		</dependency>
        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>com.sun.activation</groupId>
            <artifactId>jakarta.activation</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.15.3</version>
        </dependency>
        <dependency>
            <groupId>org.parttio</groupId>
            <artifactId>line-awesome</artifactId>
            <version>1.1.0</version>
        </dependency>
    </dependencies>

    <build>
        <defaultGoal>jetty:run</defaultGoal>
        <plugins>
            <!-- Define newer versions of Java compiler and war plugin to 
                 better support latest JDK versions. -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.1</version>
                <configuration>
                <webResources>
                    <resource>
                        <directory>src/main</directory>
                        <!-- override the destination directory for this resource -->
                        <targetPath>WEB-INF</targetPath>
                        <!-- enable filtering -->
                        <filtering>true</filtering>
                        <includes>
                            <include>web.xml</include>
                        </includes>
                    </resource>
                </webResources>
                </configuration>
            </plugin>
            <!-- Jetty plugin for easy testing without a server -->
            <plugin>
                <groupId>org.eclipse.jetty.ee10</groupId>
                <artifactId>jetty-ee10-maven-plugin</artifactId>
                <version>${jetty.version}</version>
                <configuration>
                    <!-- If using IntelliJ IDEA with autocompilation, this
                    might cause lots of unnecessary compilations in the
                    background.-->
                    <!--
                    <scanIntervalSeconds>2</scanIntervalSeconds>-->
                    <!-- Use war output directory to get the webpack files -->
                    <webAppConfig>
                        <allowDuplicateFragmentNames>true</allowDuplicateFragmentNames>
                    </webAppConfig>
                </configuration>
            </plugin>

            <!--
                Take care of synchronizing java dependencies and imports in
                package.json and main.js files.
                It also creates webpack.config.js if not exists yet.
            -->
            <plugin>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <version>${vaadin.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-frontend</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>run</id>
            <properties>
                <vaadin.productionMode>false</vaadin.productionMode>
                <prod_mode>false</prod_mode>
                <app_version>${project.version}-test</app_version>
            </properties>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                    </plugin>
                </plugins>
            </build>
            <dependencies>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>vaadin-core</artifactId>
                    <exclusions>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>copilot</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>hilla-dev</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>flow-react</artifactId>
                        </exclusion>
                    </exclusions>
                </dependency>
            </dependencies>
        </profile>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>production</id>
            <properties>
                <vaadin.productionMode>true</vaadin.productionMode>
                <app_version>${project.version}-prod</app_version>
                <prod_mode>true</prod_mode>
            </properties>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <version>${vaadin.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>build-frontend</goal>
                                </goals>
                                <phase>compile</phase>
                            </execution>
                        </executions>
                        <configuration>
                            <!--  Disables "react router", which brings no
                            features for flow app, but grows the front-end bundle-->
                            <reactEnable>false</reactEnable>
                            <!-- Make sure custom bundle is created, otherwise
                                 the default prod bundle might containt various React related features.
                            -->
                            <forceProductionBuild>true</forceProductionBuild>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
            <dependencies>
                    <dependency>
                        <groupId>com.vaadin</groupId>
                        <artifactId>flow-server-production-mode</artifactId>
                    </dependency>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>vaadin-core</artifactId>
                    <exclusions>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>copilot</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>hilla-dev</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>flow-react</artifactId>
                        </exclusion>
                        <!-- This as well in production -->
                        <exclusion>
                            <groupId>com.vaadin</groupId>
                            <artifactId>vaadin-dev</artifactId>
                        </exclusion>
                    </exclusions>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <id>it</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.eclipse.jetty</groupId>
                        <artifactId>jetty-maven-plugin</artifactId>
                        <version>${jetty.version}</version>
                        <configuration>
                            <scanIntervalSeconds>0</scanIntervalSeconds>
                            <stopPort>8081</stopPort>
                            <stopWait>5</stopWait>
                            <stopKey>${project.artifactId}</stopKey>
                        </configuration>
                        <executions>
                            <execution>
                                <id>start-jetty</id>
                                <phase>pre-integration-test</phase>
                                <goals>
                                    <goal>deploy-war</goal>
                                </goals>
                            </execution>
                            <execution>
                                <id>stop-jetty</id>
                                <phase>post-integration-test</phase>
                                <goals>
                                    <goal>stop</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>

                    <!-- Runs the integration tests (*IT) after the server is started -->
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-failsafe-plugin</artifactId>
                        <version>2.22.2</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>integration-test</goal>
                                    <goal>verify</goal>
                                </goals>
                            </execution>
                        </executions>
                        <configuration>
                            <trimStackTrace>false</trimStackTrace>
                            <enableAssertions>true</enableAssertions>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

[knoobie (Christian Knoop)]

Well… not so sure… might be worth to create a ticket on GitHub about it - looks like the new development mode requires some Jackson configuration that isn’t always present… so you might need to completely exclude it for the time being.

Only thing that can be improved but won’t help in your case… is to use the latest Jetty version (that fixes other issues you might face) and aligns the jsoup version (probably 1.17.x)

[Charles-Edouard (Charles-Edouard Ruault)]

Thanks ! I’ve upgraded Jsoup & Jetty.
Now I’ll file the bug

[marcoc_753 (Marco Collovati)]

The cause can be com.sendgrid:sendgrid-java that depends on several jackson 2.10 artifacts

[INFO] +- com.sendgrid:sendgrid-java:jar:4.4.8:compile
[INFO] |  +- com.sendgrid:java-http-client:jar:4.5.1:compile
[INFO] |  |  +- org.apache.httpcomponents:httpcore:jar:4.4.15:compile
[INFO] |  |  \- org.apache.httpcomponents:httpclient:jar:4.5.13:compile
[INFO] |  |     \- commons-logging:commons-logging:jar:1.2:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.10.2:compile
[INFO] |  \- com.fasterxml.jackson.core:jackson-databind:jar:2.10.2:compile

[Charles-Edouard (Charles-Edouard Ruault)]

Thanks, I’ll check this out.

[Charles-Edouard (Charles-Edouard Ruault)]

You nailed it. I’ve upgrade to Sendgrid 4.10.2 and the exception is gone.