如果在使用鸿蒙工具当中出现SERVICE_UNAVAILABLE的提示，请按以下解决方案处理。

问题

在安装运行Wearable应用时出现“Failure[SERVICE_UNAVAILABLE]”错误，如下截图：

解决方法

出现该问题时，可能是由于系统出现异常，您可以尝试通过如下方式进行解决：

1、重启Wearabale设备，然后再重新安装。

2、如果问题还没有得到解决，您可以在DevEco Studio中点击Help > Show Log in Explorer收集错误日志信息，然后访问HarmonyOS社区发帖求助，我们会有专人跟进帮助您尽快解决问题。相关参考：有华为鸿蒙官方人员诊断并解决开发问题的HarmonyOS社区/论坛。

附：真机运行报错Failure[SERVICE_UNAVAILABLE]的日志，供参考

环境为在DevEco Studio中，真机是华为手表Galileo-38E型号GLL-AL00，运行应用时安装即报错Failure[SERVICE_UNAVAILABLE]，下面是日志信息：

2021-12-09 10:24:00,681 [9483755]   INFO - armony.run.tasks.DeployHapTask - End pushing successfully.

2021-12-09 10:24:00,681 [9483755]   INFO - riptions.ApplicationSubscriber - HarmonyCustomTopic message logged

2021-12-09 10:24:00,681 [9483755]   INFO - armony.run.tasks.DeployHapTask - Starting to install to /sdcard/ee360b78978f439491d04c6c5ee61c3c/.

2021-12-09 10:24:03,788 [9486862]   WARN - i.harmony.run.tasks.LaunchTask - Execute exception: Failure[SERVICE_UNAVAILABLE]

2021-12-09 10:24:03,788 [9486862]   INFO - armony.run.tasks.DeployHapTask - Ending install with result: false

2021-12-09 10:24:03,788 [9486862]   INFO - armony.run.tasks.DeployHapTask - Removing temporary directory /sdcard/ee360b78978f439491d04c6c5ee61c3c

2021-12-09 10:24:03,923 [9486997]   INFO - armony.run.tasks.DeployHapTask - Ending remove temp directory with result: true

2021-12-09 10:24:03,923 [9486997]   WARN - ny.run.HarmonyLaunchTaskRunner - Some launch tasks failed. Launching the debugger stopped.

2021-12-09 10:24:03,923 [9486997]   INFO - run.AndroidLogcatOutputCapture - stopAll()

2021-12-09 10:24:09,436 [9492510]   INFO - rationStore.ComponentStoreImpl - Saving appHttpConfigurable took 11 ms

2021-12-09 10:24:16,011 [9499085]   INFO - rationStore.ComponentStoreImpl - Saving appHttpConfigurable took 11 ms