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[FLINK-36604][datastream] StreamingJobGraphGenerator::setOperatorConfig checks input serializer length #25576

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Original file line number Diff line number Diff line change
Expand Up @@ -1192,6 +1192,13 @@ public static void setOperatorConfig(
? 0 // single input operator
: inEdge.getTypeNumber() - 1; // in case of 2 or more inputs

Preconditions.checkState(
inputIndex < inputSerializers.length,
"Invalid inputIndex %s for vertex '%s': Expected inputIndex to be less than %s (number of input serializers).",
inputIndex,
inputSerializers.length,
vertex);

if (chainedSource != null) {
// chained source is the input
if (inputConfigs[inputIndex] != null) {
Expand Down