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asubramanian
asubramanian
Gold ⭐️
May 10, 2018

Metron Indexing topology appears stopped in Ambari UI

  • October 5, 2026 at 9:09 AM
  • 3 replies
  • 4319 views
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Problem

On some of the HCP deployments, the Indexing topology might show up as "stopped, while the actual topology might be running (when you check in Storm UI).

Additionally, one might also see the following kind of error messages in ambari-agent,log.

INFO 2018-02-05 22:21:39,990 PythonReflectiveExecutor.py:67 - Reflective command failed with exception:
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/ambari_agent/PythonReflectiveExecutor.py", line 59, in run_file
imp.load_source('__main__', script)
File "/var/lib/ambari-agent/cache/common-services/METRON/0.4.3/package/scripts/indexing_master.py", line 18, in <module>
import requests
File "/usr/lib/python2.6/site-packages/requests/__init__.py", line 53, in <module>
from .packages.urllib3.contrib import pyopenssl
File "/usr/lib/python2.6/site-packages/requests/packages/__init__.py", line 61, in load_module
if name in sys.modules:
AttributeError: 'NoneType' object has no attribute 'modules'

Reasoning

  • If the above symptoms are true, you are most likely seeing METRON-1451

Solution

  1. Install version 2.61. of python-requests on the server pip install requests==2.6.1
  2. Restart the Indexing topology to resolve the issue.

    3 replies

    laeeq_ahmad
    laeeq_ahmad
    Silver ⭐️⭐️
    May 24, 2018

    Hello,

    Still getting below error. Still not able to start Metron Indexing.

    p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; background-color: #ffffff} span.s1 {font-variant-ligatures: no-common-ligatures}

    Traceback (most recent call last):

    File "/usr/lib/python2.6/site-packages/ambari_agent/PythonReflectiveExecutor.py", line 59, in run_file

    imp.load_source('__main__', script)

    File "/var/lib/ambari-agent/cache/common-services/METRON/0.4.1.1.4.2.0/package/scripts/indexing_master.py", line 18, in <module>

    import requests

    File "/usr/lib/python2.7/site-packages/requests/__init__.py", line 53, in <module>

    from .packages.urllib3.contrib import pyopenssl

    File "/usr/lib/python2.7/site-packages/requests/packages/__init__.py", line 3, in <module>

    from . import urllib3

    File "/usr/lib/python2.7/site-packages/requests/packages/__init__.py", line 61, in load_module

    AttributeError: 'NoneType' object has no attribute 'modules'

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    asubramanian
    asubramanianAuthor
    Gold ⭐️
    May 24, 2018

    Did you restart the Indexing topology after the change? Note that you might have to restart from command line, since Ambari will not allow stopping of an (already) stopped service.

    Can you post the version of python-requests you are running?

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    luodonghua
    luodonghua
    Gold ⭐️
    June 28, 2018

    I encountered similar problem with EL7 and python requests=2.6.0, fixed as below:

    [root@XXXX ~]# yum remove python-requests-2.6.0-1.el7_1.noarch
    Loaded plugins: langpacks, product-id, search-disabled-repos
    Repository HDP-UTILS-1.1.0.21 is listed more than once in the configuration
    Resolving Dependencies
    Installed size: 774 k
    Is this ok [y/N]: y
    Downloading packages:
    Running transaction check
    Running transaction test
    Transaction test succeeded
    Running transaction
    Erasing : insights-client-3.0.3-9.el7_5.noarch 1/2
    warning: /etc/insights-client/insights-client.conf saved as /etc/insights-client/insights-client.conf.rpmsave
    Erasing : python-requests-2.6.0-1.el7_1.noarch 2/2
    Verifying : python-requests-2.6.0-1.el7_1.noarch 1/2
    Verifying : insights-client-3.0.3-9.el7_5.noarch 2/2
    Removed:
    python-requests.noarch 0:2.6.0-1.el7_1
    Dependency Removed:
    insights-client.noarch 0:3.0.3-9.el7_5
    Complete!
    [root@XXXX ~]# pip install requests
    Collecting requests
    Downloading https://files.pythonhosted.org/packages/65/47/7e02164a2a3db50ed6d8a6ab1d6d60b69c4c3fdf57a284257925dfc12bda/requests-2.19.1-py2.py3-none-any.whl (91kB)
    100% |████████████████████████████████| 92kB 5.2MB/s
    Requirement already satisfied: idna<2.8,>=2.5 in /usr/lib/python2.7/site-packages (from requests) (2.6)
    Requirement already satisfied: chardet<3.1.0,>=3.0.2 in /usr/lib/python2.7/site-packages (from requests) (3.0.4)
    Requirement already satisfied: urllib3<1.24,>=1.21.1 in /usr/lib/python2.7/site-packages (from requests) (1.22)
    Requirement already satisfied: certifi>=2017.4.17 in /usr/lib/python2.7/site-packages (from requests) (2018.4.16)
    Installing collected packages: requests
    Successfully installed requests-2.19.1

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