Error with running vaadin 8 on Jetty8 - jetty

Question

I just migrated my application from vaadin 7 to vaadin 8.1.4. When I run my application on Jetty 8, I get the following error(only once). Application seems to be working fine, but now sure how can I get rid of this error
2017-10-02 15:21:32.608:WARN:oejs.ServletHandler:Error for /PUSH
java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.upgrade(Ljava/lang/Class;)Ljavax/servlet/http/HttpUpgradeHandler;
at org.apache.tomcat.websocket.server.UpgradeUtil.doUpgrade(UpgradeUtil.java:234)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:77)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:667)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:748)
What could be the possible reason?
Attached is my POM file
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>sample</groupId>
<artifactId>sample</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<name>sample Maven Webapp</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<!-- JUnit -->
<junit.version>4.12</junit.version>
<!-- SureFire -->
<surefire.version>2.18.1</surefire.version>
<!-- Spring -->
<spring.version>4.1.6.RELEASE</spring.version>
<spring.security.version>4.0.4.RELEASE</spring.security.version>
<!-- Hibernate / JPA -->
<hibernate.version>4.3.9.Final</hibernate.version>
<hibernate.validator.version>5.1.3.Final</hibernate.validator.version>
<!-- Logging -->
<log4j.version>1.2.17</log4j.version>
<!-- Vaadin -->
<vaadin.version>8.1.2</vaadin.version>
<vaadin.charts.version>4.0.0</vaadin.charts.version>
<vaadin.filteringtable.version>0.9.15.v7</vaadin.filteringtable.version>
<vaadin.spring.version>1.1.1</vaadin.spring.version>
<vaadin.spring.integration.version>3.1</vaadin.spring.integration.version>
<!-- Servlet -->
<javax.api.version>3.0.1</javax.api.version>
<javax.jstl.version>1.2</javax.jstl.version>
<asm.version>5.0.3</asm.version>
<!-- Apache -->
<apache.commons.version>2.6</apache.commons.version>
<!-- SQL Connector -->
<sqlconnector.version>5.1.35</sqlconnector.version>
<!-- JBibText -->
<jbibtex.version>1.0.15</jbibtex.version>
<!-- Joda -->
<joda.version>2.8.2</joda.version>
<!-- Stax -->
<stax.version>1.2.0</stax.version>
<!-- iText -->
<itext.version>5.0.6</itext.version>
<!-- Java Home -->
<JAVA_HOME>C:\Program Files\Java\jdk1.8.0_45\</JAVA_HOME>
<!-- Java Version -->
<java.version>1.8</java.version>
<!-- Flyway -->
<flyway.version>3.2.1</flyway.version>
</properties>
<dependencies>
<!-- JUnit -->
<dependency>
<groupId>JUnit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${javax.api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${javax.jstl.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>${asm.version}</version>
<scope>compile</scope>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate.validator.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>${hibernate.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/net.sf.ehcache/ehcache-core -->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.6.11</version>
</dependency>
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>2.10.0</version>
</dependency>
<!-- SQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${sqlconnector.version}</version>
<scope>runtime</scope>
</dependency>
<!-- Logging -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>test</scope>
</dependency>
<!-- Flyway -->
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>${flyway.version}</version>
</dependency>
<!-- EventBus -->
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>18.0</version>
</dependency>
<!-- Vaadin -->
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-compatibility-server</artifactId>
<version>${vaadin.version}</version>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-compatibility-client-compiled</artifactId>
<version>${vaadin.version}</version>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-compatibility-client</artifactId>
<version>${vaadin.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-compatibility-shared</artifactId>
<version>${vaadin.version}</version>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiler</artifactId>
<version>${vaadin.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-themes</artifactId>
<version>${vaadin.version}</version>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>
<version>${vaadin.version}</version>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<!-- Vaadin Addons -->
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-charts</artifactId>
<version>${vaadin.charts.version}</version>
</dependency>
<dependency>
<groupId>org.vaadin.alump.labelbutton</groupId>
<artifactId>labelbutton-addon</artifactId>
<version>0.2.0</version>
</dependency >
<dependency>
<groupId>org.vaadin.addons</groupId>
<artifactId>vaadin-combobox-multiselect</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>org.vaadin.addon</groupId>
<artifactId>confirmdialog</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>org.vaadin.addons</groupId>
<artifactId>animator</artifactId>
<version>3.0.0</version>
</dependency>
<!-- Apache Commons -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>${apache.commons.version}</version>
</dependency>
<!-- jbibtext -->
<dependency>
<groupId>org.jbibtex</groupId>
<artifactId>jbibtex</artifactId>
<version>${jbibtex.version}</version>
</dependency>
<!-- Joda -->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda.version}</version>
</dependency>
<dependency>
<groupId>stax</groupId>
<artifactId>stax</artifactId>
<version>${stax.version}</version>
</dependency>
<!-- JSoup -->
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.8.3</version>
</dependency>
<!-- iText -->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>${itext.version}</version>
</dependency>
<!-- Jackson 4 JSON -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.8</version>
</dependency>
<!-- Mail -->
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.2</version>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.5.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context-support -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>3.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
<repositories>
<repository>
<id>vaadin-addons</id>
<url>http://maven.vaadin.com/vaadin-addons</url>
</repository>
<repository>
<id>osssonatype</id>
<name>OSS Sonatype</name>
<url>https://repo1.maven.org/maven2/</url>
<layout>default</layout>
</repository>
</repositories>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.sql</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*</include>
</includes>
</resource>
</resources>
<finalName>sample</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire.version}</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>${surefire.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<verbose>true</verbose>
<!-- <fork>true</fork> -->
<executable>${JAVA_HOME}/bin/javac</executable>
<compilerVersion>${java.version}</compilerVersion>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<filesets>
<fileset><directory>${project.build.directory}/${project.build.finalName}</directory></fileset>
</filesets>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<webResources>
<webResource>
<directory>target/sample/CustomWidgetset</directory>
<targetPath>VAADIN/widgetsets/CustomWidgetset</targetPath>
<filtering>false</filtering>
</webResource>
</webResources>
</configuration>
</plugin>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.version}</version>
<configuration>
<extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>
<!-- <runTarget>mobilemail</runTarget> -->
<!-- We are doing "inplace" but into subdir VAADIN/widgetsets. This
way compatible with Vaadin eclipse plugin. -->
<webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
<hostedWebapp>${project.build.directory}/${project.build.finalName}</hostedWebapp>
<noServer>true</noServer>
<!-- Remove draftCompile when project is ready -->
<draftCompile>false</draftCompile>
<compileReport>true</compileReport>
<style>OBF</style>
<strict>true</strict>
<runTarget>http://localhost:8080/</runTarget>
</configuration>
<executions>
<execution>
<configuration>
<!-- if you don't specify any modules, the plugin will find them -->
<!-- <modules> <module>com.vaadin.demo.mobilemail.gwt.ColorPickerWidgetSet</module>
</modules> -->
</configuration>
<goals>
<goal>clean</goal>
<goal>resources</goal>
<goal>update-theme</goal>
<goal>update-widgetset</goal>
<goal>compile-theme</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.8</version>
<configuration>
<outxml>true</outxml>
<verbose>true</verbose>
<showWeaveInfo>true</showWeaveInfo>
<forceAjcCompile>true</forceAjcCompile>
<aspectLibraries>
<aspectLibrary>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</aspectLibrary>
</aspectLibraries>
<complianceLevel>${java.version}</complianceLevel>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>