[ https://issues.apache.org/jira/browse/HDFS-4942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao resolved HDFS-4942. ----------------------------- Resolution: Fixed Fix Version/s: 2.1.0-beta > Add retry cache support in Namenode > ----------------------------------- > > Key: HDFS-4942 > URL: https://issues.apache.org/jira/browse/HDFS-4942 > Project: Hadoop HDFS > Issue Type: Improvement > Components: ha, namenode > Reporter: Suresh Srinivas > Assignee: Suresh Srinivas > Fix For: 2.1.0-beta > > Attachments: HDFSRetryCache.pdf > > > In current HA mechanism with FailoverProxyProvider and non HA setups with > RetryProxy retry a request from the RPC layer. If the retried request has > already been processed at the namenode, the subsequent attempts fail for > non-idempotent operations such as create, append, delete, rename etc. This > will cause application failures during HA failover, network issues etc. > This jira proposes adding retry cache at the namenode to handle these > failures. More details in the comments. -- This message was sent by Atlassian JIRA (v6.3.4#6332)