Guard against null list from aws SQS lib (#9710)

Co-authored-by: Trask Stalnaker <[email protected]>

instrumentation/aws-lambda/aws-lambda-events-2.2/library/src/main/java/io/opentelemetry/instrumentation/awslambdaevents/v2_2/internal/AwsLambdaSqsInstrumenterFactory.java

@@ -10,6 +10,7 @@
 import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.instrumentation.api.instrumenter.Instrumenter;
 import io.opentelemetry.instrumentation.api.instrumenter.SpanKindExtractor;
+import java.util.List;
 
 /**
  * This class is internal and is hence not for public use. Its APIs are unstable and can change at
@@ -39,10 +40,11 @@ public static Instrumenter<SQSMessage, Void> forMessage(OpenTelemetry openTeleme
 
  private static String spanName(SQSEvent event) {
  String source = "multiple_sources";
- if (!event.getRecords().isEmpty()) {
- String messageSource = event.getRecords().get(0).getEventSource();
- for (int i = 1; i < event.getRecords().size(); i++) {
- SQSMessage message = event.getRecords().get(i);
+ List<SQSMessage> records = event.getRecords();
+ if (records != null && !records.isEmpty()) {
+ String messageSource = records.get(0).getEventSource();
+ for (int i = 1; i < records.size(); i++) {
+ SQSMessage message = records.get(i);
  if (!message.getEventSource().equals(messageSource)) {
  messageSource = null;
  break;