技術標籤：大資料

啟動集群后發現沒有SecondaryNameNode

[[email protected] hadoop-2.7.2]# sbin/start-dfs.sh
Starting namenodes on [hadoop02]
hadoop02: starting namenode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-namenode-hadoop02.out
hadoop02: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-
 
root-datanode-hadoop02.out
hadoop04: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop04.out
hadoop03: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop03.out
Starting secondary namenodes [hadoop02]
hadoop02: starting secondarynamenode,
 
 logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-secondarynamenode-hadoop02.out
[[email protected] hadoop-2.7.2]# jps
8630 Jps
8327 DataNode
8188 NameNode
[[email protected] hadoop-2.7.2]#

檢視報錯結果為：

[[email protected] hadoop-2.7.2]# cat logs/hadoop-root-secondarynamenode-hadoop02.out
Exception in thread "main"
 
 java.lang.IllegalArgumentException: Does not contain a valid host:port authority: hdfs:
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:213)
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:164)
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:153)
	at org.apache.hadoop.hdfs.DFSUtil.substituteForWildcardAddress(DFSUtil.java:1179)
	at org.apache.hadoop.hdfs.DFSUtil.getInfoServerWithDefaultHost(DFSUtil.java:1147)
	at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.getInfoServer(SecondaryNameNode.java:494)
	at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:237)
	at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.<init>(SecondaryNameNode.java:192)
	at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.main(SecondaryNameNode.java:671)

解決方法：

[[email protected] hadoop-2.7.2]# cd /export/servers/hadoop-2.7.5/etc/hadoop
[ro[email protected] hadoop-2.7.2]# vim hdfs-site.xml

檢視中埠是否正確：
不可以是value>hdfs://hadoop02:50070
不可以是value>hdfs://192.155.132.88:50070
必須是value>hdfs://hadoop02:50070這種格式

改正之後關閉叢集再次啟動叢集發現SecondaryNameNode出現了

[[email protected] hadoop-2.7.2]# sbin/stop-dfs.sh   //改正之後關閉叢集
Stopping namenodes on [hadoop02]
hadoop02: stopping namenode
hadoop04: stopping datanode
hadoop03: stopping datanode
hadoop02: stopping datanode
Stopping secondary namenodes [hadoop02]
hadoop02: no secondarynamenode to stop   
You have new mail in /var/spool/mail/root
[[email protected] hadoop-2.7.2]# sbin/start-dfs.sh  //再次開啟叢集
Starting namenodes on [hadoop02]
hadoop02: starting namenode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-namenode-hadoop02.out
hadoop02: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop02.out
hadoop04: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop04.out
hadoop03: starting datanode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop03.out
Starting secondary namenodes [hadoop02]
hadoop02: starting secondarynamenode, logging to /export/servers/hadoop-2.7.2/logs/hadoop-root-secondarynamenode-hadoop02.out
You have new mail in /var/spool/mail/root
[[email protected] hadoop-2.7.2]# jps
9251 DataNode
9557 Jps
9112 NameNode
9433 SecondaryNameNode   //完美！
[[email protected] hadoop-2.7.2]#

完美撒花！