HDFS的DataNode服务用root权限启动后在用Hadoop用户启动报错处理 _root权限

天下之事常成于困约，而败于奢靡。这篇文章主要讲述HDFS的DataNode服务用root权限启动后在用Hadoop用户启动报错处理相关的知识，希望能为你提供帮助。
报错日志

org.apache.hadoop.hdfs.qjournal.client.QuorumException: Got too many exceptions to achieve quorum size 2/3. 3 exceptions thrown:
10.4.151.60:8485: Call From master1/10.4.151.58 to slave1:8485 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see:http://wiki.apache.org/hadoop/ConnectionRefused
10.4.151.63:8485: Call From master1/10.4.151.58 to slave3:8485 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see:http://wiki.apache.org/hadoop/ConnectionRefused
10.4.151.62:8485: Call From master1/10.4.151.58 to slave2:8485 failed on connection exception: java.net.ConnectException: 拒绝连接; 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:286)
at org.apache.hadoop.hdfs.qjournal.client.AsyncLoggerSet.waitForWriteQuorum(AsyncLoggerSet.java:142)
at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.createNewUniqueEpoch(QuorumJournalManager.java:183)
at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.recoverUnfinalizedSegments(QuorumJournalManager.java:436)
at org.apache.hadoop.hdfs.server.namenode.JournalSet$8.apply(JournalSet.java:624)
at org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393)
at org.apache.hadoop.hdfs.server.namenode.JournalSet.recoverUnfinalizedSegments(JournalSet.java:621)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.recoverUnclosedStreams(FSEditLog.java:1490)

原因：
上午不小心用root权限启动之后，在停掉用hadoop账号启动就报了如上的错误

org.apache.hadoop.hdfs.qjournal.client.QuorumException: Got too many exceptions to achieve quorum size 2/3. 3 exceptions thrown:
10.4.151.60:8485: Call From master1/10.4.151.58 to slave1:8485 failed on connection exception: java.net.ConnectException: 拒绝连接

大致意思是报错太多，无法全部显示,namenode拒绝连接。
问题分析：
因为是通过root权限启动了之后，Datanode服务及日志下的权限全部变成了root权限，所以在hadoop用户下无法启动
解决方案：