解决设定confirm hosts时无限循环读条的问题

参考https://community.hortonworks.com/questions/147748/ambari-setup-stuck-at-step-3.html?page=1&pageSize=10&sort=votes

问题如下，在确认hosts节点全部成功后，系统检测错误时进入无限等待

 进入ambari-server的日志中查看，得到

"Unable to lookup the cluster by ID; assuming that there is no cluster and therefore no configs for this execution command: Cluster not found, clusterName=clusterID=-1"

通过查找资料，在 /var/lib/ambari-agent/data/output-107.txt下发现报错：

There was an unknown error while checking installed packages and existing repositories: list index out of range
Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/custom_actions/scripts/check_host.py", line 170, in actionexecute
    installed_packages, repos = self.execute_existing_repos_and_installed_packages_check(config)
  File "/var/lib/ambari-agent/cache/custom_actions/scripts/check_host.py", line 234, in execute_existing_repos_and_installed_packages_check
    availablePackages = self.pkg_provider.all_available_packages()
  File "/usr/lib/python2.6/site-packages/resource_management/core/providers/package/yumrpm.py", line 210, in all_available_packages
    return self._get_available_packages(None)
  File "/usr/lib/python2.6/site-packages/resource_management/core/providers/package/yumrpm.py", line 146, in _get_available_packages
    return self._lookup_packages(cmd, 'Available Packages')
  File "/usr/lib/python2.6/site-packages/resource_management/core/providers/package/yumrpm.py", line 191, in _lookup_packages
    if items[i + 2].find('@') == 0:
IndexError: list index out of range 2019-3-28 15:05:45,882 - Transparent huge page check started.

发现该处python代码报错，原因是可用的包数量超出了range范围

解决方法：直接修改该处python代码（所有节点都要）

原代码：

def _lookup_packages(self, command, skip_till):
    """
    :type command list[str]
    :type skip_till str|None
    """
    packages = []
    result = self._call_with_timeout(command)
    if result and 0 == result['retCode']:
      lines = result['out'].split('\n')
      lines = [line.strip() for line in lines]
      items = []
      if skip_till:
        skip_index = 3
        for index in range(len(lines)):
          if skip_till in lines[index]:
            skip_index = index + 1
            break
      else:
        skip_index = 0
      for line in lines[skip_index:]:
        items = items + line.strip(' \t\n\r').split()
      for i in range(0, len(items), 3):
        if '.' in items[i]:
          items[i] = items[i][:items[i].rindex('.')]
        if items[i + 2].find('@') == 0:
          items[i + 2] = items[i + 2][1:]
        packages.append(items[i:i + 3])
    return packages

修改后的代码：

def _lookup_packages(self, command, skip_till):
    """
    :type command list[str]
    :type skip_till str|None
    """
    packages = []
    result = self._call_with_timeout(command)
    if result and 0 == result['retCode']:
      lines = result['out'].split('\n')
      lines = [line.strip() for line in lines]
      items = []
      if skip_till:
        skip_index = 3
        for index in range(len(lines)):
          if skip_till in lines[index]:
            skip_index = index + 1
            break
      else:
        skip_index = 0
      for line in lines[skip_index:]:
        items = items + line.strip(' \t\n\r').split()
      for i in range(0, len(items), 3):
        if '.' in items[i]:
          items[i] = items[i][:items[i].rindex('.')]
        if i + 2 < len(items) :
          if items[i + 2].find('@') == 0:
            items[i + 2] = items[i + 2][1:]
          packages.append(items[i:i + 3])
    return packages

重启ambari-server

成功