在Heroku上运行：目标无法访问，标识符已解析为null

Question

我正在尝试在Heroku上运行一个简单的JSF项目并获得异常：

**Unreachable, identifier 'merhabaBean' resolved to null**

我的pom.xml：

    <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>com.hakdogan</groupId>
      <artifactId>tomcatHeroku</artifactId>
      <version>1.0-SNAPSHOT</version>
      <name>tomcatHeroku</name>
      <url>http://maven.apache.org</url>

      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <prime.version>3.0.RC1</prime.version>
        <prime.tema.version>1.0.2</prime.tema.version>
      </properties>

      <dependencies>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-core</artifactId>
            <version>7.0.22</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-logging-juli</artifactId>
            <version>7.0.22</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <version>7.0.22</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>7.0.22</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper-el</artifactId>
            <version>7.0.22</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jsp-api</artifactId>
            <version>7.0.22</version>
        </dependency>

        <dependency>
            <groupId>org.primefaces</groupId>
            <artifactId>primefaces</artifactId>
            <version>${prime.version}</version>
        </dependency>

        <dependency>  
            <groupId>org.primefaces.themes</groupId>  
            <artifactId>bluesky</artifactId>  
            <version>${prime.tema.version}</version>
        </dependency> 

        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-api</artifactId>
            <version>2.1.6</version>
        </dependency>
        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-impl</artifactId>
            <version>2.1.6</version>
        </dependency>

        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>6.0</version>
        </dependency>
        <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.1.2</version>
            </dependency>
            <dependency>
                <groupId>taglibs</groupId>
                <artifactId>standard</artifactId>
                <version>1.1.2</version>
            </dependency>

            <dependency>
                <groupId>org.glassfish.web</groupId>
                <artifactId>el-impl</artifactId>
                <version>2.2</version>
            </dependency>

           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>3.8.1</version>
               <scope>test</scope>
            </dependency>
      </dependencies>
      <build>
        <finalName>embeddedTomcatSample</finalName>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>appassembler-maven-plugin</artifactId>
                <version>1.1.1</version>
                <configuration>
                    <assembleDirectory>target</assembleDirectory>
                    <programs>
                        <program>
                            <mainClass>launch.Main</mainClass>
                            <name>webapp</name>
                        </program>
                    </programs>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>assemble</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
      </build>

      <repositories>
            <repository>
                <id>prime-repo</id>
                <name>PrimeFaces Maven Repository</name>
                <url>http://repository.primefaces.org</url>
                <layout>default</layout>
            </repository>
        </repositories>

</project>

有关异常的更多详细信息： javax.el.PropertyNotFoundException：/index.xhtml @ 21,135 value =“＃{merhabaBean.mesaj}”：目标无法访问，标识符'merhabaBean'已解析为null     com.sun.faces.facelets.el.TagValueExpression.getType（TagValueExpression.java:100）     org.primefaces.util.ComponentUtils.getValueToRender（ComponentUtils.java:75）     org.primefaces.component.inputtext.InputTextRenderer.encodeMarkup（InputTextRenderer.java:83）     org.primefaces.component.inputtext.InputTextRenderer.encodeEnd（InputTextRenderer.java:50）     javax.faces.component.UIComponentBase.encodeEnd（UIComponentBase.java:875）     com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive（HtmlBasicRenderer.java:312）     com.sun.faces.renderkit.html_basic.GridRenderer.renderRow（GridRenderer.java:185）     com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren（GridRenderer.java:129）     javax.faces.component.UIComponentBase.encodeChildren（UIComponentBase.java:845）     javax.faces.component.UIComponent.encodeAll（UIComponent.java:1757）     javax.faces.render.Renderer.encodeChildren（Renderer.java:168）     javax.faces.component.UIComponentBase.encodeChildren（UIComponentBase.java:845）     javax.faces.component.UIComponent.encodeAll（UIComponent.java:1757）     javax.faces.component.UIComponent.encodeAll（UIComponent.java:1760）     javax.faces.component.UIComponent.encodeAll（UIComponent.java:1760）     com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView（FaceletViewHandlingStrategy.java:402）     com.sun.faces.application.view.MultiViewHandler.renderView（MultiViewHandler.java:131）     com.sun.faces.lifecycle.RenderResponsePhase.execute（RenderResponsePhase.java:121）     com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）     com.sun.faces.lifecycle.LifecycleImpl.render（LifecycleImpl.java:139）     javax.faces.webapp.FacesServlet.service（FacesServlet.java:594）

感谢您的回答。