Chao Sun created HDFS-14660:
-------------------------------
Summary: [SBN Read] ObserverNameNode should throw StandbyException
for requests not from ObserverProxyProvider
Key: HDFS-14660
URL: https://issues.apache.org/jira/browse/HDFS-14660
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Chao Sun
Assignee: Chao Sun
In a HDFS HA cluster with consistent reads enabled (HDFS-12943), clients could
be using either {{ObserverReadProxyProvider}}, {{ConfiguredProxyProvider}}, or
something else. Since observer is just a special type of SBN and we allow
transitions between them, a client NOT using {{ObserverReadProxyProvider}} will
need to have {{dfs.ha.namenodes.<nameservice>}} include all NameNodes in the
cluster, and therefore, it may send request to a observer node.
For this case, we should check whether the {{stateId}} in the incoming RPC
header is set or not, and throw an {{StandbyException}} when it is not.
--
This message was sent by Atlassian JIRA
(v7.6.14#76016)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
