hfutatzhanghb commented on code in PR #6988:
URL: https://github.com/apache/hadoop/pull/6988#discussion_r1796307998
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java:
##########
@@ -791,6 +800,36 @@ <T> T invokeAtAvailableNs(RemoteMethod method, Class<T>
clazz)
return invokeOnNs(method, clazz, io, nss);
}
+ <T> T invokeAtAvailableNsAsync(RemoteMethod method, Class<T> clazz)
+ throws IOException {
+ String nsId = subclusterResolver.getDefaultNamespace();
+ // If default Ns is not present return result from first namespace.
+ Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+ // If no namespace is available, throw IOException.
+ IOException io = new IOException("No namespace available.");
+
+ asyncComplete(null);
+ if (!nsId.isEmpty()) {
+ asyncTry(() -> {
+ rpcClient.invokeSingle(nsId, method, clazz);
+ });
+
+ asyncCatch((AsyncCatchFunction<T, IOException>)(res, ioe) -> {
+ if (!clientProto.isUnavailableSubclusterException(ioe)) {
+ LOG.debug("{} exception cannot be retried",
+ ioe.getClass().getSimpleName());
+ throw ioe;
+ }
+ nss.removeIf(n -> n.getNameserviceId().equals(nsId));
+ invokeOnNs(method, clazz, io, nss);
Review Comment:
@KeeProMise Sir, thanks for reviewing , this PR is depended on HDFS-17601.
I will continue doing this PR after HDFS-17601 is resolved.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
