sadanand48 commented on code in PR #4325:
URL: https://github.com/apache/ozone/pull/4325#discussion_r1134570744
##########
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/OmUtils.java:
##########
@@ -790,4 +791,30 @@ public static String format(List<ServiceInfo> nodes, int
port,
return sb.toString();
}
}
+
+ /**
+ * @param omHost
+ * @param omPort
+ * If the authority in the URI is not one of the service ID's,
+ * it is treated as a hostname. Check if this hostname can be resolved
+ * and if it's reachable.
+ */
+ public static void resolveOmHost(String omHost, int omPort)
+ throws IOException {
+ InetSocketAddress omHostAddress = NetUtils.createSocketAddr(omHost,
omPort);
+ if (omHostAddress.isUnresolved()) {
+ throw new IllegalArgumentException(
+ "Cannot resolve OM host " + omHost + " in the URI",
+ new UnknownHostException());
+ }
+ try {
+ if (!omHostAddress.getAddress().isReachable(5000)) {
+ throw new IllegalArgumentException(
+ "OM host " + omHost + " unreachable in the URI");
+ }
+ } catch (IOException e) {
+ LOG.error("Failure in resolving OM host address", e);
+ throw e;
+ }
+ }
Review Comment:
Done, tried it and it works.
```bash
bash-4.2$ ozone fs -ls ofs://om/
Found 1 items
drwxrwxrwx - hadoop hadoop 0 2023-03-13 20:13 ofs://om/s3v
bash-4.2$ ozone fs -ls ofs://om1/
ls: Cannot resolve OM host om1 in the URI
bash-4.2$ exit
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