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https://issues.apache.org/jira/browse/HDDS-1982?focusedWorklogId=310050&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-310050
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ASF GitHub Bot logged work on HDDS-1982:
----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Sep/19 19:20
Start Date: 10/Sep/19 19:20
Worklog Time Spent: 10m
Work Description: swagle commented on pull request #1344: HDDS-1982
Extend SCMNodeManager to support decommission and maintenance states
URL: https://github.com/apache/hadoop/pull/1344#discussion_r322918560
##########
File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/states/NodeStateMap.java
##########
@@ -309,4 +381,61 @@ private void checkIfNodeExist(UUID uuid) throws
NodeNotFoundException {
throw new NodeNotFoundException("Node UUID: " + uuid);
}
}
+
+ /**
+ * Create a list of datanodeInfo for all nodes matching the passed states.
+ * Passing null for one of the states acts like a wildcard for that state.
+ *
+ * @param opState
+ * @param health
+ * @return List of DatanodeInfo objects matching the passed state
+ */
+ private List<DatanodeInfo> filterNodes(
+ NodeOperationalState opState, NodeState health) {
+ if (opState != null && health != null) {
Review comment:
Can we write Line 395-440 with one simple stream().filter? Nothing wrong
with code itself but just a thought.
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Issue Time Tracking
-------------------
Worklog Id: (was: 310050)
Time Spent: 4h 50m (was: 4h 40m)
> Extend SCMNodeManager to support decommission and maintenance states
> --------------------------------------------------------------------
>
> Key: HDDS-1982
> URL: https://issues.apache.org/jira/browse/HDDS-1982
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: SCM
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Labels: pull-request-available
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> Currently, within SCM a node can have the following states:
> HEALTHY
> STALE
> DEAD
> DECOMMISSIONING
> DECOMMISSIONED
> The last 2 are not currently used.
> In order to support decommissioning and maintenance mode, we need to extend
> the set of states a node can have to include decommission and maintenance
> states.
> It is also important to note that a node decommissioning or entering
> maintenance can also be HEALTHY, STALE or go DEAD.
> Therefore in this Jira I propose we should model a node state with two
> different sets of values. The first, is effectively the liveliness of the
> node, with the following states. This is largely what is in place now:
> HEALTHY
> STALE
> DEAD
> The second is the node operational state:
> IN_SERVICE
> DECOMMISSIONING
> DECOMMISSIONED
> ENTERING_MAINTENANCE
> IN_MAINTENANCE
> That means the overall total number of states for a node is the cross-product
> of the two above lists, however it probably makes sense to keep the two
> states seperate internally.
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