有好几次，启动Hadoop和HBase之后，执行jps命令，已经看到有HMaster的进程，

但是进入到HBase的shell，执行一个命令，会出现下面的错误：

ERROR: org.apache.hadoop.hbase.MasterNotRunningException: Retried 7 times

进入到logs目录查看master的日志：发现一直显示下面的内容：

2013-04-13 17:13:17,374 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

2013-04-13 17:13:27,377 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

2013-04-13 17:13:37,386 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

2013-04-13 17:13:47,393 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

2013-04-13 17:13:57,395 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

2013-04-13 17:14:07,409 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

原来是Hadoop在刚启动的时候，还处在安全模式造成的。

[root@Hadoop-NN-01 hadoop-2.6.0-cdh5.6.0]$ bin/hadoop dfsadmin -safemode get

Safe mode is ON

可等Hadoop退出安全模式后再执行HBase命令，或者手动退出Hadoop的安全模式

[root@Hadoop-NN-01 hadoop-2.6.0-cdh5.6.0]$ bin/hadoop dfsadmin -safemode leave

Safe mode is OFF

现在再执行HBase的命令就没有问题了。

hadoop dfsadmin-safemode 命令参数说明：

enter    - 进入安全模式

leave    - 强制NameNode离开安全模式

get      - 返回安全模式是否开启的信息

wait     - 等待，一直到安全模式结束。

Util.FSUtils: Waiting for dfs to exit safe mode的更多相关文章

  1. hbase_异常_04_util.FSUtils: Waiting for dfs to exit safe mode...

    一.异常现象 启动hbase的时,hbase的日志中可以发现: Waiting for dfs to exit safe mode... 然后就抛异常了 2018-03-22 17:00:28,994 ...

  2. Centos:Another app is currently holding the yum lock; waiting for it to exit...

    Another app is currently holding the yum lock; waiting for it to exit... 另一个应用程序是:PackageKit 内存: 27 ...

  3. Another app is currently holding the yum lock; waiting for it to exit...

    刚安装完虚拟机,用xshell连接上linux后,安装程序时一直出现这个信息Another app is currently holding the yum lock; waiting for it ...

  4. linux -小记（2）问题：yum 安装报错"Another app is currently holding the yum lock; waiting for it to exit... ...: yum Memory : 26 M RSS (868 MB VSZ) Started: Wed Oct 26 22:48:24 2016 - 0"

    yum 安装报错 "Another app is currently holding the yum lock; waiting for it to exit... The other ap ...

  5. another app is currently holding the yum lock;waiting for it to exit解决

    有时用yum升级一些文件时,会出现以下情况:   another app is currently holding the yum lock;waiting for it to exit...   可 ...

  6. Another app is currently holding the yum lock; waiting for it to exit... 怎么解决

    Another app is currently holding the yum lock; waiting for it to exit... 怎么解决 这个问题说明你的程序yum程序正在运行,必须 ...

  7. Another app is currently holding the yum lock; waiting for it to exit 解决方法

    Another app is currently holding the yum lock; waiting for it to exit... The other application is: P ...

  8. yum安装提示Another app is currently holding the yum lock; waiting for it to exit...

    在Linux系统中使用yum安装软件时,提示yum处于锁定状态 Another app is currently holding the yum lock; waiting for it to exi ...

  9. （转）yum提示Another app is currently holding the yum lock; waiting for it to exit...

    文章转自 yum 下载东西突然卡主了,我直接ctrl+c退出,然后再次下载时候出现 Another app is currently holding the yum lock; waiting for ...

随机推荐

  1. Android必学-异步加载+Android自定义View源码【申明：来源于网络】

    Android必学-异步加载+Android自定义View源码[申明:来源于网络] 异步加载地址:http://download.csdn.net/detail/u013792369/8867609 ...

  2. Mac Mini2018 开箱（视频）全球首映！Kindle 开箱一并奉上（文字）

    2018.12.9更新 为了方便大家收看我的这个开箱视频,我把视频放在知乎上了,可以参考如下连接即可观看啦: https://zhuanlan.zhihu.com/p/51677467 ------- ...

  3. CH 1402 - 后缀数组 - [字符串hash]

    题目链接:传送门 描述 后缀数组 (SA) 是一种重要的数据结构,通常使用倍增或者DC3算法实现,这超出了我们的讨论范围. 在本题中,我们希望使用快排.Hash与二分实现一个简单的 $O(n \log ...

  4. [No0000140]WMI使用的WIN32_类库名

    "SELECT * FROM Win32_NetworkAdapter WHERE (MACAddress IS NOT NULL) AND (NOT (PNPDeviceID LIKE ' ...

  5. Converting Python Virtual Machine Code to C

    Converting Python Virtual Machine Code to C

  6. ruby-from-other-languages

    http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/to-ruby-from-python/ http://www. ...

  7. “对外部(局部)变量的访问”是C语言函数指针的最大弱点

    1.“对外部(局部)变量的访问”是C语言函数指针的最大弱点 . #include <stdio.h> #include <stdlib.h> /* 结构体定义 */ struc ...

  8. 介绍一款jquery ui组件gijgo（含tree树状结构、grid表格），特点：简易、文档全清晰易懂、示例代码

    http://gijgo.com   gijgo组件 特点:简易.文档全-虽然是英文的但是清晰易懂可读性强.含示例代码(后端直接用原生.Net C# MVC的哦!非常合.Net开发胃口),网站网速快, ...

  9. hadoop 学习笔记2

    ============Hive vs Hadoop============== Hive是建立在Hadoop之上为了减少MapReduce jobs编写工作的批处理系统,HBase是为了支持弥补Ha ...

  10. adg的数据传输应用三大模式转换

    1.最大可用性模式(Maximum Availability) 1)该模式提供了仅次于"最大保护模式"的数据保护能力: 2)要求至少一个物理备库收到重做日志后,主库的事务才能够提交 ...