如何修复 Knowage 中的空仪表板屏幕？答案

【问题标题】：How to fix empty dashboard screen in Knowage?如何修复 Knowage 中的空仪表板屏幕？
【发布时间】：2019-08-24 21:33:20
【问题描述】：

我尝试获取在 docker 环境中运行的知识。在获得知识运行的几个问题之后，我终于设法登录。在更多问题之后，我还能够将知识连接到 fiware orion 上下文浏览器。

但是，当我尝试将驾驶舱添加到我的工作区时，我收到了一个空的内容页面。知识导航仍然可见且有效。这看起来像这样：

Knowage issue

我按照官方描述 (https://hub.docker.com/r/knowagelabs/knowage-server-docker) 运行 docker-compose。 docker-compose 文件如下所示：

    knowage:
        image: knowagelabs/knowage-server-docker:6.3.3
        links:
            - knowagedb:db
        ports:
            - "8080:8080"
        environment:
            - WAIT_MYSQL=true

    knowagedb:
        image: mysql:5.6
        environment:
            - MYSQL_USER=username
            - MYSQL_PASSWORD=userpassword
            - MYSQL_DATABASE=knowagedb
            - MYSQL_ROOT_PASSWORD=rootpassword

我在我的 docker 日志中发现了两个可能与此行为相对应的问题：

第一：

knowage_1    | SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
knowage_1    | SLF4J: Defaulting to no-operation (NOP) logger implementation
knowage_1    | SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

第二个：

knowage_1    | 03-Apr-2019 07:57:50.345 SEVERE [main] org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans Exception processing Global JNDI Resources
knowage_1    |  javax.naming.NamingException: Could not load resource factory class [Root exception is java.lang.ClassNotFoundException: de.myfoo.commonj.work.FooWorkManagerFactory]
knowage_1    |  at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:66)
knowage_1    |  at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
knowage_1    |  at org.apache.naming.NamingContext.lookup(NamingContext.java:839)
knowage_1    |  at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
knowage_1    |  at org.apache.naming.NamingContextBindingsEnumeration.nextElementInternal(NamingContextBindingsEnumeration.java:117)
knowage_1    |  at org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:71)
knowage_1    |  at org.apache.naming.NamingContextBindingsEnumeration.next(NamingContextBindingsEnumeration.java:34)
knowage_1    |  at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:138)
knowage_1    |  at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:145)
knowage_1    |  at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.createMBeans(GlobalResourcesLifecycleListener.java:110)
knowage_1    |  at org.apache.catalina.mbeans.GlobalResourcesLifecycleListener.lifecycleEvent(GlobalResourcesLifecycleListener.java:82)
knowage_1    |  at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94)
knowage_1    |  at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:395)
knowage_1    |  at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:339)
knowage_1    |  at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:786)
knowage_1    |  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
knowage_1    |  at org.apache.catalina.startup.Catalina.start(Catalina.java:687)
knowage_1    |  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
knowage_1    |  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
knowage_1    |  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
knowage_1    |  at java.lang.reflect.Method.invoke(Method.java:498)
knowage_1    |  at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:353)
knowage_1    |  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:493)
knowage_1    | Caused by: java.lang.ClassNotFoundException: de.myfoo.commonj.work.FooWorkManagerFactory
knowage_1    |  at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
knowage_1    |  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
knowage_1    |  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
knowage_1    |  at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:61)
knowage_1    |  ... 22 more
knowage_1    |

非常感谢任何支持以使其运行。

谢谢，凯文

【问题讨论】：

标签： docker jndi slf4j tomcat8 fiware-knowage

【解决方案1】：

我自己想出来的。

我需要在 docker-compose 文件中设置可选参数“PUBLIC_ADDRESS”...

    knowage:
        image: knowagelabs/knowage-server-docker:6.3.3
        links:
            - knowagedb:db
        ports:
            - "8080:8080"
        environment:
            - WAIT_MYSQL=true
            - PUBLIC_ADDRESS=localhost

    knowagedb:
        image: mysql:5.6
        environment:
            - MYSQL_USER=username
            - MYSQL_PASSWORD=userpassword
            - MYSQL_DATABASE=knowagedb
            - MYSQL_ROOT_PASSWORD=rootpassword

我发现这是因为许多其他人都遇到了问题，因为他们没有正确定义基本网址。所以我只是将“localhost”添加到容器的“public_address”环境中

【讨论】：