[ https://issues.apache.org/jira/browse/HDFS-12232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Wang updated HDFS-12232: ------------------------------- Summary: ConfiguredFailoverProxyProvider caches DNS results indefinitely (was: ConfiguredFailoverProxyProvider caches DNS results infinitely) > ConfiguredFailoverProxyProvider caches DNS results indefinitely > --------------------------------------------------------------- > > Key: HDFS-12232 > URL: https://issues.apache.org/jira/browse/HDFS-12232 > Project: Hadoop HDFS > Issue Type: Bug > Components: ha, hdfs > Reporter: Haohui Mai > > {{ConfiguredFailoverProxyProvider}} resolves the IP addresses and stores them > in the internal state. As a result when migrating the standby NN to a > different machine, it requires restarting all HDFS clients. > A better approach is to follow Java's policy of caching DNS names: > http://javaeesupportpatterns.blogspot.com/2011/03/java-dns-cache-reference-guide.html -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org