2014-01-23 13:50:55.0|分类: hadoop|浏览量: 1929
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转载：http://www.cookqq.com/lookBlog.action?id=079198bd-603f-43d8-910d-81d0d1789c34 情景描述: 因为以前namenode节点下面的hadoop/lib文件夹加入了一些别的jar包(为了测试一些东西),而datanode节点下面的hadoop/lib文件夹没有增加.导致hadoop启动错误.为了统一,我把namenode节点下面的hadoop/lib文件夹下面的所有文件都删除了,从datanode节点拷贝了一份. 启动hadoop正常,查看线程正常,但是50075/50030不能访问. 查看 hadoop-tianbx-namenode-localhost.log 报错信息: java.lang.NoClassDefFoundError: javax/servlet/jsp/HttpJspPage at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:634) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:634) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:379) at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:341) at org.mortbay.util.Loader.loadClass(Loader.java:91) at org.mortbay.util.Loader.loadClass(Loader.java:71) at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:643) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1234) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:460) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.apache.hadoop.http.HttpServer.start(HttpServer.java:461) at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:246) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:202) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:279) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) Caused by: java.lang.ClassNotFoundException: javax.servlet.jsp.HttpJspPage at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) ... 47 more java.lang.NoClassDefFoundError: javax/servlet/jsp/JspFactory at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:99) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:431) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:643) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1234) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:460) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.apache.hadoop.http.HttpServer.start(HttpServer.java:461) at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:246) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:202) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:279) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) Caused by: java.lang.ClassNotFoundException: javax.servlet.jsp.JspFactory at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) ... 22 more
很明显缺少一些包,我把namenode和datanode节点文件一比,发现确实有三个文件没有拷贝到namenode节点下面的hadoop/lib文件夹. 把文件夹jsp-2.1/jdiff/native拷贝到namenode节点下面的hadoop/lib文件夹. 启动hadoop,ok了
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