aswinshakil commented on code in PR #3867:
URL: https://github.com/apache/ozone/pull/3867#discussion_r1006135381
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/DatanodeInfo.java:
##########
@@ -305,8 +314,19 @@ public void setCommandCounts(CommandQueueReportProto cmds)
{
"Setting it to zero", cmdCount, this);
cmdCount = 0;
}
+ cmdCount += mutableCmds.getOrDefault(command, 0);
+ // Each CommandType will be in the report once only. So we remove any
+ // we have seen, so we can add anything the DN has not reported but
+ // there is a command queued for. The DNs should return a count for all
+ // command types even if they have a zero count, so this is really to
+ // handle something being wrong on the DN where it sends a spare
report.
+ // It really should never happe.
Review Comment:
```suggestion
// It really should never happen.
```
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/DatanodeInfo.java:
##########
@@ -286,11 +286,20 @@ public void setNodeStatus(NodeStatus newNodeStatus) {
* Set the current command counts for this datanode, as reported in the last
* heartbeat.
* @param cmds Proto message containing a list of command count pairs.
+ * @param commandsToBeSent Summary of commands which will be sent to the DN
+ * as the heartbeat is processed and should be added
+ * to the command count.
*/
- public void setCommandCounts(CommandQueueReportProto cmds) {
+ public void setCommandCounts(CommandQueueReportProto cmds,
+ Map<SCMCommandProto.Type, Integer> commandsToBeSent) {
try {
int count = cmds.getCommandCount();
+ Map<SCMCommandProto.Type, Integer> mutableCmds
+ = new HashMap<>(commandsToBeSent);
lock.writeLock().lock();
+ // Purge the existing counts, as each report should completely replace
+ // the existing counts.
+ commandCounts.clear();
Review Comment:
Just a quick question, why was this not done before and done now? I
understand we would like to keep the current count and replace the stale
counters. I thought it was already done by `commandCounts.put(command,
cmdCount)` and also now with `commandCounts.putAll(mutableCmds)`.
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