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https://issues.apache.org/jira/browse/HDFS-17362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17813538#comment-17813538
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ASF GitHub Bot commented on HDFS-17362:
---------------------------------------
simbadzina commented on code in PR #6510:
URL: https://github.com/apache/hadoop/pull/6510#discussion_r1475654924
##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/RouterObserverReadProxyProvider.java:
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@@ -84,7 +84,8 @@ public class RouterObserverReadProxyProvider<T> extends
AbstractNNFailoverProxyP
public RouterObserverReadProxyProvider(Configuration conf, URI uri, Class<T>
xface,
HAProxyFactory<T> factory) {
- this(conf, uri, xface, factory, new IPFailoverProxyProvider<>(conf, uri,
xface, factory));
+ this(conf, uri, xface, factory,
+ new ConfiguredFailoverProxyProvider<>(conf, uri, xface, factory));
Review Comment:
In my original code I assumed the routers would all sit behind a single host
name and traffic would be split via DNS. The IpFailoverProxyProvider is then
needed incase one router is down but the IP is still in the DNS record.
I can see how in other setups users may need to list all the routers
explicitly in the client configurations.
Can we make the proxy provider configurable? To support both usecases.
> RBF: RouterObserverReadProxyProvider should use
> ConfiguredFailoverProxyProvider internally
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-17362
> URL: https://issues.apache.org/jira/browse/HDFS-17362
> Project: Hadoop HDFS
> Issue Type: Task
> Reporter: Takanobu Asanuma
> Assignee: Takanobu Asanuma
> Priority: Major
> Labels: pull-request-available
>
> Currently, RouterObserverReadProxyProvider is using IPFailoverProxyProvider,
> while ObserverReadProxyProvider is using ConfiguredFailoverProxyProvider. If
> we are to align RouterObserverReadProxyProvider with
> ObserverReadProxyProvider, RouterObserverReadProxyProvider should internally
> use ConfiguredFailoverProxyProvider. Moreover, IPFailoverProxyProvider has
> an issue with resolving HA configurations. (For example,
> IPFailoverProxyProvider cannot resolve hdfs://router-service.)
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