虛擬機啟動hadoop無法啟動

2022-10-24 10:43:41,743 WARN  [main] namenode.NameNode (NameNode.java:format(1204)) - Encountered exception during format: 
org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. 1 exceptions thrown:
192.168.40.201:8485: Call From c701/192.168.40.201 to c701:8485 failed on connection exception: java.net.ConnectException: 拒絕連接; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
	at org.apache.hadoop.hdfs.qjournal.client.QuorumException.create(QuorumException.java:81)
	at org.apache.hadoop.hdfs.qjournal.client.QuorumCall.rethrowException(QuorumCall.java:287)
	at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.hasSomeData(QuorumJournalManager.java:282)
	at org.apache.hadoop.hdfs.server.common.Storage.confirmFormat(Storage.java:1142)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.confirmFormat(FSImage.java:209)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1198)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1645)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1755)
2022-10-24 10:43:41,846 ERROR [main] namenode.NameNode (NameNode.java:main(1760)) - Failed to start namenode.
org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. 1 exceptions thrown:
192.168.40.201:8485: Call From c701/192.168.40.201 to c701:8485 failed on connection exception: java.net.ConnectException: 拒絕連接; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
	at org.apache.hadoop.hdfs.qjournal.client.QuorumException.create(QuorumException.java:81)
	at org.apache.hadoop.hdfs.qjournal.client.QuorumCall.rethrowException(QuorumCall.java:287)
	at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.hasSomeData(QuorumJournalManager.java:282)
	at org.apache.hadoop.hdfs.server.common.Storage.confirmFormat(Storage.java:1142)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.confirmFormat(FSImage.java:209)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1198)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1645)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1755)

重啟虛擬機，啟動Zookeeper和journalnode
啟動三臺機器的zookeeper 和 journalnode

zkServer.sh start
hadoop-daemon.sh start journalnode

第一次格式化namenode時報錯，namennode可能會自動進入了安全模式，所以需要關閉安全模式

hadoop dfsadmin -safemode leave    #關閉safe mode

重新格式化

hdfs namenode -format

hadoop中namenode無法啟動

需要先關閉所有服務

stop-all.sh 

查看配置文件是否有錯誤
然后刪除tmp文件，并重新格式化namenode，tmp文件查看core-site.xml文件配置的位置我的位置是/opt/programs/hadoop-2.7.2/tmp

 rm -rf /opt/programs/hadoop-2.7.2/tmp

三臺機器分別啟動zookeeper ，journalnode和關閉安全模式

zkServer.sh start
hadoop-daemon.sh start journalnode
hadoop dfsadmin -safemode leave

格式化Namenode

cd /opt/programs/hadoop-2.7.2   #先進入Hadoop的根目錄   
hdfs namenode -format

執(zhí)行命令，將hadoop01節(jié)點Hadoop安裝目錄下的tmp文件夾遠程復制到hadoop02節(jié)點的Hadoop安裝目錄下

cd /opt/programs/hadoop-2.7.2/
scp -r tmp/ root@hadoop02:/opt/programs/hadoop-2.7.2

#啟動hadoop文章來源地址http://www.zghlxwxcb.cn/news/detail-504276.html

start-dfs.sh
start-yarn.sh

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