我在 Ubuntu-20 中安裝了 Hadoop-3.3.4。我寫了啟動hadoop的命令，即
samar@pc:~$ $HADOOP_HOME/sbin/start-all.sh
然后它顯示輸出為。
WARNING: Attempting to start all Apache Hadoop daemons as samar in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
Starting datanodes
Starting secondary namenodes [pc]
Starting resourcemanager
Starting nodemanagers
但是當我嘗試使用命令訪問 HDFS
samar@pc:~$ hdfs dfs -ls
它給出了一條訊息：
ls: Call From pc/127.0.1.1 to localhost:9000 failed on connection exception:
java.net.ConnectException: Connection refused; For more details see:
http://wiki.apache.org/hadoop/ConnectionRefused
的輸出jps是：
10485 Jps
10101 NodeManager
9946 ResourceManager
9739 SecondaryNameNode
9533 DataNode
uj5u.com熱心網友回復：
Namenode沒有啟動成功（9000是namenodes服務埠）
還有更多日志嗎？
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標籤：Hadoop高清晰度电视