Jackie-Jiang commented on a change in pull request #6872:
URL: https://github.com/apache/incubator-pinot/pull/6872#discussion_r625312525
##########
File path: pinot-spi/src/main/java/org/apache/pinot/spi/utils/NetUtils.java
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@@ -57,4 +59,29 @@ public static String getHostnameOrAddress() {
}
}
}
+
+ /**
+ * Find an open port.
+ * @return an open port
+ * @throws IOException
+ */
+ public static int findOpenPort()
+ throws IOException {
+ try (ServerSocket socket = new ServerSocket(0)) {
+ return socket.getLocalPort();
+ }
+ }
+
+ /**
+ * Find an open port，otherwise use given default port.
+ * @param defaultPort
+ * @return an open port otherwise default port
+ */
+ public static int findOpenPort(int defaultPort) {
Review comment:
Also, it might be better to try `defaultPort + i` until we get an open
port so that the port number is more deterministic
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