LuciferYang commented on PR #39435:
URL: https://github.com/apache/spark/pull/39435#issuecomment-1375908246
@gengliangwang A little complicated. For the following definitions:
```
message SparkPlanGraphNodeWrapper {
SparkPlanGraphNode node = 1;
SparkPlanGraphClusterWrapper cluster = 2;
}
```
since both `node` and `cluster` may be null, the value should be obtained in
the following way during deserialization:
```scala
val node = if (input.hasNode) {
deserializeSparkPlanGraphNode(input.getNode)
} else null
```
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