HA: ConfiguredFailoverProxyProvider doesn't correctly stop ProtocolTranslators
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Key: HDFS-2624
URL: https://issues.apache.org/jira/browse/HDFS-2624
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Fix For: HA branch (HDFS-1623)
In the tip of branch, the direct proxies to the NN have been replaced by
ProtocolTranslator implementations. But, the proxy provider still calls
RPC.stopProxy, which generates a warning and doesn't actually stop the proxy.
We need to check if the protocol implementation is a Closeable and call close()
instead in that case.
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