Ted Yu created HADOOP-14930:
-------------------------------

             Summary: Upgrade Jetty to 9.4 version
                 Key: HADOOP-14930
                 URL: https://issues.apache.org/jira/browse/HADOOP-14930
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Ted Yu


Currently 9.3.19.v20170502 is used.

In hbase 2.0+, 9.4.6.v20170531 is used.

When starting mini dfs cluster in hbase unit tests, we get the following:
{code}
java.lang.NoSuchMethodError: 
org.eclipse.jetty.server.session.SessionHandler.getSessionManager()Lorg/eclipse/jetty/server/SessionManager;
  at 
org.apache.hadoop.http.HttpServer2.initializeWebServer(HttpServer2.java:548)
  at org.apache.hadoop.http.HttpServer2.<init>(HttpServer2.java:529)
  at org.apache.hadoop.http.HttpServer2.<init>(HttpServer2.java:119)
  at org.apache.hadoop.http.HttpServer2$Builder.build(HttpServer2.java:415)
  at 
org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:157)
  at 
org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:887)
  at 
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:723)
  at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:949)
  at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:928)
  at 
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1637)
  at 
org.apache.hadoop.hdfs.MiniDFSCluster.createNameNode(MiniDFSCluster.java:1277)
  at 
org.apache.hadoop.hdfs.MiniDFSCluster.configureNameService(MiniDFSCluster.java:1046)
  at 
org.apache.hadoop.hdfs.MiniDFSCluster.createNameNodesAndSetConf(MiniDFSCluster.java:921)
{code}
This issue is to upgrade Jetty to 9.4 version



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