siddhantsangwan commented on code in PR #6367:
URL: https://github.com/apache/ozone/pull/6367#discussion_r1542914562
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hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/NodeDecommissionManager.java:
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@@ -368,6 +384,57 @@ public synchronized void startDecommission(DatanodeDetails
dn)
}
}
+ private synchronized boolean
checkIfDecommissionPossible(List<DatanodeDetails> dns, List<DatanodeAdminError>
errors) {
+ int minInService = -1, numDecom = dns.size();
+ int inServiceTotal =
nodeManager.getNodeCount(NodeStatus.inServiceHealthy());
+ for (DatanodeDetails dn : dns) {
+ try {
+ NodeStatus nodeStatus = getNodeStatus(dn);
+ NodeOperationalState opState = nodeStatus.getOperationalState();
+ if (opState != NodeOperationalState.IN_SERVICE) {
+ numDecom--;
+ }
+ } catch (NodeNotFoundException ex) {
+ numDecom--;
+ }
+ }
+
+ for (DatanodeDetails dn : dns) {
Review Comment:
Yeah, it's not very probable but it's possible that a node goes missing
somehow just after the check. We should account for that possibility.
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