azagrebin commented on a change in pull request #6599: [FLINK-10150][metrics]
Fix OperatorMetricGroup creation for Batch
URL: https://github.com/apache/flink/pull/6599#discussion_r213666345
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/groups/TaskMetricGroup.java
##########
@@ -144,15 +144,17 @@ public OperatorMetricGroup addOperator(OperatorID
operatorID, String name) {
name = name.substring(0,
METRICS_OPERATOR_NAME_MAX_LENGTH);
}
OperatorMetricGroup operator = new
OperatorMetricGroup(this.registry, this, operatorID, name);
+ // unique OperatorIDs only exist in streaming, so we have to
rely on the name for batch operators
+ final String key = operatorID + name;
synchronized (this) {
- OperatorMetricGroup previous =
operators.put(operatorID, operator);
+ OperatorMetricGroup previous = operators.put(key,
operator);
Review comment:
I suggest to reduce the code under `synchronized` using:
```
return operators.putIfAbsent(key, operator);
```
Also, I would rename `addOperator` function name to `getOrAddOperatorMetric`.
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