Rohith created YARN-3222:
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Summary: RMNodeImpl#ReconnectNodeTransition should send scheduler
events in sequential order
Key: YARN-3222
URL: https://issues.apache.org/jira/browse/YARN-3222
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.6.0
Reporter: Rohith
Assignee: Rohith
Priority: Critical
When a node is reconnected,RMNodeImpl#ReconnectNodeTransition notifies the
scheduler in a events node_added,node_removed or node_resource_update. These
events should be notified in an sequential order i.e node_added event and next
node_resource_update events.
But if the node is reconnected with different http port, the oder of scheduler
events are node_removed --> node_resource_update --> node_added which causes
scheduler does not find the node and throw NPE and RM exit.
Node_Resource_update event should be always should be triggered via
RMNodeEventType.RESOURCE_UPDATE
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