java - 无法启动 kurento 存储库服务器

Question

当我按照 Kurento 教程运行示例 Java - Repository 时，需要先安装 kurento 存储库服务器，我遇到了一些问题。

按照 Kurento Repository Server 安装指南，在最后一步，我通过以下命令在用户级别运行服务器:

 $ cd kurento-repository-server-x.y.z
 $ ./bin/start.sh

不幸的是，它显示

$ bash ./start.sh
=========================================================================

  Kurento Repository Bootstrap Environment

  KREPO_BINARY: /home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/lib/kurento-repo.jar

  JAVA: /usr/lib/jvm/jdk1.7.0_80/bin/java

  JAVA_OPTS:  -server -XX:+UseCompressedOops -XX:+TieredCompilation 

  KREPO_OPTS:  -DconfigFilePath=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo.conf.json -Dkurento-repo.log.file=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/logs/kurento-repo.log -Dlogging.config=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo-log4j.properties -Dlog4j.configuration=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo-log4j.properties

=========================================================================

no main manifest attribute, in /home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/lib/kurento-repo.jar

OK，它找不到包含main方法的类。

所以我将 start.sh 的最后一条命令从

更改为

exec $JAVA $JAVA_OPTS $KREPO_OPTS -jar $KREPO_BINARY

到

exec $JAVA $JAVA_OPTS $KREPO_OPTS -cp $KREPO_BINARY org.kurento.repository.KurentoRepositoryServerApp

在查看源代码后，我确信 org.kurento.repository.KurentoRepositoryServerApp 包含一个 main 方法。

但是，它显示另一个错误:

$ bash ./start.sh
=========================================================================

  Kurento Repository Bootstrap Environment

  KREPO_BINARY: /home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/lib/kurento-repo.jar

  JAVA: /usr/lib/jvm/jdk1.7.0_80/bin/java

  JAVA_OPTS:  -server -XX:+UseCompressedOops -XX:+TieredCompilation 

  KREPO_OPTS:  -DconfigFilePath=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo.conf.json -Dkurento-repo.log.file=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/logs/kurento-repo.log -Dlogging.config=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo-log4j.properties -Dlog4j.configuration=/home/lcrc/kurento-java/kurento-repository/kurento-repository-server/target/kurento-repository-server-6.6.1-SNAPSHOT/config/kurento-repo-log4j.properties

=========================================================================

Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/Servlet
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2625)
    at java.lang.Class.getMethod0(Class.java:2866)
    at java.lang.Class.getMethod(Class.java:1676)
    at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
Caused by: java.lang.ClassNotFoundException: javax.servlet.Servlet
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 6 more

如何解决？

Answer 1

不确定您正在使用 kurento-java 存储库中的哪个标签，但我正在使用当前的主标签(6.6.2-SNAPSHOT)。

我做了两件事来让它工作:

1.) 不再提供在哪里可以找到 main，而是删除 pom.xml 文件中的 mainClass 引用，让 spring-boot-maven-plugin 发挥它的魔力。转到插件部分并删除 spring-boot-maven-plugin 的配置。

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <!-- REMOVE CONFIGURATION BEGIN -->
    <!-- <configuration>
            <mainClass>${start-class}</mainClass>
            <layout>ZIP</layout>
            <classifier>exec</classifier>
    </configuration> -->
    <!-- REMOVE CONFIGURATION END -->
    <executions>
            <execution>
                    <goals>
                            <goal>repackage</goal>
                    </goals>
            </execution>
    </executions>
</plugin>

2.) 执行此操作后，会发生 logback 库冲突。因此排除包含在 spring-boot-starter-web

中的 spring-boot-starter-logging

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
       <!-- ADD EXCLUSION BEGIN -->
       <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
       <!-- ADD EXCLUSION END -->
</dependency>

那么，您根本不必更改 start.sh 脚本。