开启了hadoop，zk，kafka之后，配置了conf，flume消费kafka中产生的信息
开启flume的命令：
flume-ng agent --conf /home/hduser/apps/flume/conf --conf-file /home/hduser/apps/flume/conf/applog --name a1 -Dflume.root.logger=INFO,console
第一次开启
报错信息：
2019-04-27 13:20:32,643 (main) [ERROR - org.apache.flume.node.Application.main(Application.java:374)] A fatal error occurred while running. Exception follows.
java.lang.SecurityException: sealing violation: package org.apache.flume.conf is sealed
at java.net.URLClassLoader.getAndVerifyPackage(URLClassLoader.java:399)
at java.net.URLClassLoader.definePackageInternal(URLClassLoader.java:419)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:451)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.flume.node.Application.main(Application.java:350)
上网查了老半天，实在没办法了，有大佬知道怎么办吗？
这问题就是说package org.apache.flume.conf is sealed被封装吗？
多次开启后的错误显示：
(main) [ERROR - org.apache.flume.node.Application.main(Application.java:374)] A fatal error occurred while running. Exception follows.
java.lang.SecurityException: sealing violation: can't seal package org.apache.flume.conf: already loaded
at java.net.URLClassLoader.getAndVerifyPackage(URLClassLoader.java:406)
at java.net.URLClassLoader.definePackageInternal(URLClassLoader.java:419)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:451)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.flume.node.Application.main(Application.java:350)
说那个已经被加载了 更蒙 了
求解决！
