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https://issues.apache.org/jira/browse/YARN-2708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu resolved YARN-2708.
--------------------------
Resolution: Not a Problem
> Potential null dereference in
> CommonNodeLabelsManager#internalRemoveLabelsFromNode()
> ------------------------------------------------------------------------------------
>
> Key: YARN-2708
> URL: https://issues.apache.org/jira/browse/YARN-2708
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Ted Yu
> Priority: Minor
>
> Here is the code (around line 475):
> {code}
> if (nodeId.getPort() == WILDCARD_PORT) {
> Host host = nodeCollections.get(nodeId.getHost());
> host.labels.removeAll(labels);
> newNMToLabels.put(nodeId, host.labels);
> } else {
> Node nm = getNMInNodeSet(nodeId);
> if (nm.labels != null) {
> {code}
> nm may be null in else block.
> In other places, node is created if non-existent:
> {code}
> } else {
> createNodeIfNonExisted(nodeId);
> Node nm = getNMInNodeSet(nodeId);
> {code}
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