[AMBARI-4708] Actual configs not updated after restart of host component

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.5.0
• Component/s: ambari-agent, ambari-server
• Assignee: Dmytro Sen
• Reporter: Dmytro Sen
• Created: 18/Feb/14 12:17
• Updated: 20/Feb/14 19:29
• Resolved: 20/Feb/14 19:29

Description

Updated HDFS configs aren't applied after RESTART.

Steps:

• On a 3 node cluster, create a ConfigGroup for datanode.
• Override heap size to 1025m instead of 1024m
• Restart DN.

Result:

• The /var/lib/ambari-agent/data/config.json, has the correct values for the config type:

  "global": {"2": "version1392171779044", "tag": "version1"}
  

• The API call still shows global as default version:

  http://hostname1:8080/api/v1/clusters/c1/hosts/hostname1/host_components/DATANODE
  

Note:
It works after agent is restarted.

{
global: {
overrides: {
2: "version1392171779044"
},
default: "version1"
}

The cause is that hooks aren't executed for the custom_command like RESTART. Since configs for HDFS are generated in hook.py, we must execute hook.py before custom commands or move config generation from hook.py.

Issue Links

• links to: Review board