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问答 如何构建入口函数启动nb，关闭函数关闭nb
发布于 1757天前 作者 wdmic 1728 次浏览 复制 上一个帖子 下一个帖子
标签: nutzwk

本人小白，现在有一个需求，就是在另外一个项目构建一个入口函数用来启动nb项目，请问如何构建。

public class MainLauncher {
    private static final Log log = Logs.get();
    @Inject("refer:$ioc")
    private Ioc ioc;
    @Inject
    private PropertiesProxy conf;
    @Inject
    private RedisService redisService;
    @Inject
    private BrokerServer brokerServer;

    private NbApp nb = null;

    public static void main(String[] args) throws Exception {
        NbApp nb = new NbApp().setPrintProcDoc(true);
        nb.setMainPackage("cn.wizzer.iot");
        nb.run();
    }
    public void start() {
        if (nb == null){
            nb = new NbApp().setPrintProcDoc(true);
        }
        nb.setMainPackage("cn.wizzer.iot");
        nb.run();
    }
    public void stop() {
        if (nb.isStarted()){
            nb.shutdown();
        }
    }

这是我自己构建的入口函数，start方法执行后项目会运行，当时一些Logger不能打印，stop方法调用后，会出现很多错误信息，如下：

28-Jun-2019 09:04:58.795 INFO [Abandoned connection cleanup thread] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1304)
	at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:985)
	at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkContextClassLoaders(AbandonedConnectionCleanupThread.java:96)
	at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:69)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

28-Jun-2019 09:04:59.088 INFO [nioEventLoopGroup-2-2] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [io.netty.util.concurrent.GlobalEventExecutor$2]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [io.netty.util.concurrent.GlobalEventExecutor$2]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1304)
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1292)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1118)
	at io.netty.util.concurrent.GlobalEventExecutor.startThread(GlobalEventExecutor.java:225)
	at io.netty.util.concurrent.GlobalEventExecutor.execute(GlobalEventExecutor.java:213)
	at io.netty.util.concurrent.DefaultPromise.safeExecute(DefaultPromise.java:768)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:432)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:94)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:926)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)

28-Jun-2019 09:04:59.089 INFO [nioEventLoopGroup-2-2] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [org.apache.log4j.spi.ThrowableInformation]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.log4j.spi.ThrowableInformation]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1304)
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1292)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1118)
	at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:165)
	at org.apache.log4j.Category.forcedLog(Category.java:391)
	at org.apache.log4j.Category.log(Category.java:856)
	at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
	at io.netty.util.internal.logging.Slf4JLogger.error(Slf4JLogger.java:181)
	at io.netty.util.concurrent.DefaultPromise.safeExecute(DefaultPromise.java:770)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:432)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:94)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:926)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)

Exception in thread "nioEventLoopGroup-2-2" java.lang.NoClassDefFoundError: org/apache/log4j/spi/ThrowableInformation
	at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:165)
	at org.apache.log4j.Category.forcedLog(Category.java:391)
	at org.apache.log4j.Category.log(Category.java:856)
	at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
	at io.netty.util.internal.logging.Slf4JLogger.error(Slf4JLogger.java:181)
	at io.netty.util.concurrent.DefaultPromise.safeExecute(DefaultPromise.java:770)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:432)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:94)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:926)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.log4j.spi.ThrowableInformation]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1294)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1118)
	... 11 more
Caused by: java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.log4j.spi.ThrowableInformation]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1304)
	at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1292)
	... 13 more

请问该如何解决，真是头大

9 回复

一个nb项目内再启动一个nb项目？应该是做不到的

NbApp是假设当前jvm里面只有一个nbapp实例

我是在一个web项目中启动一个nb项目

nb.run改成nb.start试试

现在是调用start启动正常（一些Logger日志不能打印），调用stop关闭后会出现上面的错误信息

我另外的web项目是tomcat容器，我是在容器启动时调用start，因为会增加容器启动时间，所以我开了一个线程用来调用start方法来启动nb，现在就出现关闭容器调用stop后出现上面的错误信息

感觉是tomcat容器关闭后上面那些线程没有正确关闭，但是我不知道在哪里关闭，这些线程是在nb项目中使用的，调用nb.shutdown后难道不能正确关闭nb项目吗

问题是，这些日志有什么不良影响没？

没有影响，不会影响使用，但是这些错误信息看着揪心

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