fix(bigquery-jdbc): resolve ITOpenTelemetryTest pipeline and trace validation failures (#13898)

Author: keshavdandeva

java-bigquery-jdbc/pom.xml

@@ -50,6 +50,7 @@
           <skip>${skipSurefire}</skip>
           <systemPropertyVariables>
             <JDBC_TESTS>true</JDBC_TESTS>
+            <java.net.preferIPv4Stack>true</java.net.preferIPv4Stack>
           </systemPropertyVariables>
         </configuration>
       </plugin>
@@ -59,6 +60,7 @@
         <configuration>
           <systemPropertyVariables>
             <JDBC_TESTS>true</JDBC_TESTS>
+            <java.net.preferIPv4Stack>true</java.net.preferIPv4Stack>
           </systemPropertyVariables>
         </configuration>
         <dependencies>

java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/ITOpenTelemetryTest.java

@@ -263,9 +263,15 @@ private String verifyAndFetchLogs(String connectionUuid) throws Exception {
       List<LogEntry> entries = fetchLogsWithRetry(logging, filter);
       assertFalse(entries.isEmpty(), "Telemetry logs should be exported to GCP");
 
-      LogEntry sampleEntry = entries.get(0);
-      String traceId = sampleEntry.getTrace();
-      String hexSpanId = sampleEntry.getSpanId();
+      String traceId = null;
+      String hexSpanId = null;
+      for (LogEntry entry : entries) {
+        if (entry.getTrace() != null) {
+          traceId = entry.getTrace();
+          hexSpanId = entry.getSpanId();
+          break;
+        }
+      }
 
       assertNotNull(traceId, "Log entry must contain TraceId");
       assertNotNull(hexSpanId, "Log entry must contain SpanId");