Ambari搭建hadoop错误记录

1.ResourceManager启动失败

错误如下

2019-03-24 19:57:00,607 - Error while executing command 'start':
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 214, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/resourcemanager.py", line 60, in start
    action='start'
  File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/service.py", line 59, in service
    initial_wait=5
  File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 148, in __init__
    self.env.run()
  File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 152, in run
    self.run_action(resource, action)
  File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 118, in run_action
    provider_action()
  File "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", line 274, in action_run
    raise ex
Fail: Execution of 'ls /var/run/hadoop-yarn/yarn/yarn-yarn-resourcemanager.pid >/dev/null 2>&1 && ps -p `cat /var/run/hadoop-yarn/yarn/yarn-yarn-resourcemanager.pid` >/dev/null 2>&1' returned 1.

解决办法：
修改/etc/hadoop/conf.empty/capacity-scheduler.xml，将以下两个参数的值改为：1

<property>
      <name>yarn.scheduler.capacity.root.accessible-node-labels.default.capacity</name>
      <value>1</value>
    </property>
    <property>
      <name>yarn.scheduler.capacity.root.accessible-node-labels.default.maximum-capacity</name>
      <value>1</value>
    </property>

重启resource manager 即可。

解除连接被拒绝的警告

Connection failed: [Errno 111] Connection refused to cluster

需要取消linux代理
Linux 设置/取消代理
export http_proxy=118.210.42.251:44367
或：
export https_proxy=118.210.42.251:44367

要取消该设置：
unset http_proxy
或：
unset https_proxy