Open Liberty首次启动正常，二次启动应用失败问题求助

问题描述 #

使用liberty-maven-plugin v3.7.1执行mvn liberty:dev命令启动应用：

• 首次启动时wlp目录无服务器实例，启动正常；
• 停止服务器后再次启动失败，删除C:\dev\wlp\usr\servers\localServer目录可恢复首次启动，但二次启动仍报错。

异常信息 #

[DEBUG] (org.codehaus.mojo.pluginsupport.ant.AntHelper) CWWKM2014I: Now looking for CWWKZ0001I.*app in messages.log.
    Caused by: org.apache.maven.plugin.MojoExecutionException: CWWKM2187E: Failed to deploy the app application. The application start message was not found in the log file.
        at io.openliberty.tools.maven.applications.DeployMojoSupport.verifyAppStarted(DeployMojoSupport.java:221)
        at io.openliberty.tools.maven.applications.DeployMojo.installAndVerifyApp(DeployMojo.java:220)
        at io.openliberty.tools.maven.applications.DeployMojo.installLooseApplication(DeployMojo.java:189)
        at io.openliberty.tools.maven.applications.DeployMojo.installProject(DeployMojo.java:167)
        at io.openliberty.tools.maven.applications.DeployMojo.doExecute(DeployMojo.java:81)
        at org.codehaus.mojo.pluginsupport.MojoSupport.execute(MojoSupport.java:122)
        
        
        
        [DEBUG] action.exception.stacktrace: com.ibm.ws.install.InstallException: CWWKF1250I: The following assets already exist: [javaee-8.0, localConnector-1.0, monitor-1.0, restConnector-2.0]. They will not be reinstalled. To modify an existing feature, you must manually uninstall it first.
        at com.ibm.ws.install.internal.ExceptionUtils.create(ExceptionUtils.java:127)
        at com.ibm.ws.install.internal.ExceptionUtils.createByKey(ExceptionUtils.java:116)
        at com.ibm.ws.install.internal.InstallKernelMap.singleFileResolve(InstallKernelMap.java:935)
        at com.ibm.ws.install.internal.InstallKernelMap.get(InstallKernelMap.java:299)
        at com.ibm.ws.install.map.InstallMap.get(InstallMap.java:273)
        at io.openliberty.tools.common.plugins.util.InstallFeatureUtil.installFeatures(InstallFeatureUtil.java:451)
        at io.openliberty.tools.maven.server.InstallFeatureMojo.installFeatures(InstallFeatureMojo.java:62)

pom.xml配置 #

<plugin>
    <groupId>io.openliberty.tools</groupId>
    <artifactId>liberty-maven-plugin</artifactId>
    <version>3.7.1</version>
    <configuration>
        <installDirectory>C:\dev\wlp</installDirectory>
    </configuration>
    <!-- Specify configuration, executions for liberty-maven-plugin -->
</plugin>

问题原因 #

• 特性安装冲突：二次启动时插件尝试重复安装已存在的特性（javaee-8.0等），虽然日志提示不会重装，但该异常会中断插件后续流程，导致应用部署验证步骤无法正常完成。
• 应用启动验证逻辑异常：由于特性安装阶段的异常干扰，插件未正确捕获到应用启动成功的日志CWWKZ0001I，从而抛出部署失败的错误。
• localServer目录残留状态：首次启动生成的localServer目录中保存了已安装特性的状态信息，二次启动时插件读取该状态后仍执行特性安装流程，引发冲突。

解决方案 #

• 配置插件跳过特性重复安装：在pom.xml的liberty-maven-plugin配置中添加<skipInstallFeatures>true</skipInstallFeatures>，避免二次启动时重复执行特性安装操作：

  <plugin>
      <groupId>io.openliberty.tools</groupId>
      <artifactId>liberty-maven-plugin</artifactId>
      <version>3.7.1</version>
      <configuration>
          <installDirectory>C:\dev\wlp</installDirectory>
          <skipInstallFeatures>true</skipInstallFeatures>
      </configuration>
  </plugin>
  

• 升级插件版本：liberty-maven-plugin 3.7.1存在该特性安装冲突的已知问题，升级到更高版本（如3.8.0及以上）可修复此逻辑缺陷。
• 清理服务器状态缓存：若不想修改配置，可在二次启动前执行mvn liberty:clean命令清理localServer目录的残留状态，替代手动删除目录的操作。

内容的提问来源于stack exchange，提问作者Mr Smith