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From "Surendra Singh Lilhore (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14215) RBF: GetServerDefaults and GetStoragePolicies are dependent on Availability of Default NS
Date Wed, 23 Jan 2019 12:05:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16749865#comment-16749865
] 

Surendra Singh Lilhore commented on HDFS-14215:
-----------------------------------------------

Thanks [~ayushtkn] for the patch.

#  Pls check the nameservice set size before using it. Better add assert logic for set size.
{code}
+    Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+    return (FsServerDefaults) rpcClient.invokeSingle(nss.iterator().next(),
+        method);
{code}
# Pls check the {{DFSClient#getServerDefaults()}} cache logic. With cache we can avoid extra
RPC calls.

> RBF: GetServerDefaults and GetStoragePolicies are dependent on Availability of Default
NS
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-14215
>                 URL: https://issues.apache.org/jira/browse/HDFS-14215
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ayush Saxena
>            Assignee: Ayush Saxena
>            Priority: Major
>         Attachments: HDFS-14215-HDFS-13891-01.patch, HDFS-14215-HDFS-13891-02.patch
>
>
> GetServerDefaults and GetStoragePolicies fetches from Default NS.Thus is dependent on
the availability of Default NS.



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