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https://reviews.apache.org/r/60921/
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Review request for Ambari, Andrew Onischuk, Sumit Mohanty, and Sid Wagle.


Bugs: AMBARI-21504
    https://issues.apache.org/jira/browse/AMBARI-21504


Repository: ambari


Description
-------

Steps:

* Installed Ambari 2.2 with Slider and services it required
* Upgraded Ambari to 2.5.2.0-134
* Registered HDP 2.6.1.0 repo, installed packages
* Restarted services that needed restart
* Ran service checks
* Started upgrade

Result: _Restarting History Server_ step failed with 

{noformat:title=errors-91.txt}
Traceback (most recent call last):
  File 
"/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/historyserver.py",
 line 134, in <module>
    HistoryServer().execute()
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
 line 329, in execute
    method(env)
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
 line 841, in restart
    self.pre_upgrade_restart(env, upgrade_type=upgrade_type)
  File 
"/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/historyserver.py",
 line 85, in pre_upgrade_restart
    copy_to_hdfs("mapreduce", params.user_group, params.hdfs_user, 
skip=params.sysprep_skip_copy_tarballs_hdfs)
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/functions/copy_tarball.py",
 line 256, in copy_to_hdfs
    mode=0555
  File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", 
line 155, in __init__
    self.env.run()
  File 
"/usr/lib/python2.6/site-packages/resource_management/core/environment.py", 
line 160, in run
    self.run_action(resource, action)
  File 
"/usr/lib/python2.6/site-packages/resource_management/core/environment.py", 
line 124, in run_action
    provider_action()
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py",
 line 560, in action_create_on_execute
    self.action_delayed("create")
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py",
 line 550, in action_delayed
    parsed_not_managed_paths = [HdfsResourceProvider.parse_path(path) for path 
in self.resource.immutable_paths]
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/providers/hdfs_resource.py",
 line 519, in parse_path
    math_with_protocol_and_nn_url = re.match("[a-zA-Z]+://[^/]+(/.+)", path)
  File "/usr/lib64/python2.7/re.py", line 137, in match
    return _compile(pattern, flags).match(string)
TypeError: expected string or buffer
{noformat}

{noformat:title=command-91.json}
"hostLevelParams": {
...
"not_managed_hdfs_path_list": "[null,\"/mr-history/done\",\"/app-logs\"]",
...
}
{noformat}

Failure seems to be due to {{null}} value in the list.


Diffs
-----

  
ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java
 9b19ade 
  
ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
 82171f6 
  
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ClientConfigResourceProvider.java
 daca2d0 
  ambari-server/src/main/java/org/apache/ambari/server/state/ConfigHelper.java 
ab8026c 
  
ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py
 9a9f9ca 
  
ambari-server/src/main/resources/common-services/YARN/2.1.0.2.0/package/scripts/service.py
 6495209 
  
ambari-server/src/test/java/org/apache/ambari/server/state/ConfigHelperTest.java
 b1c10f5 


Diff: https://reviews.apache.org/r/60921/diff/1/


Testing
-------

mvn clean test


Thanks,

Vitalyi Brodetskyi

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