[ https://issues.apache.org/jira/browse/HADOOP-14193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jose Miguel Arreola updated HADOOP-14193: ----------------------------------------- Comment: was deleted (was: [~aagarwal] i opened this ticket by mistake in HADOOP instead of YARN, so i closed this as invalid, and created it in the right place in YARN, refer to this issue: https://issues.apache.org/jira/browse/YARN-6358) > Cache the resolved hosts to prevent calls to InetAddress.getByName and > normalizeHost > ------------------------------------------------------------------------------------ > > Key: HADOOP-14193 > URL: https://issues.apache.org/jira/browse/HADOOP-14193 > Project: Hadoop Common > Issue Type: Improvement > Components: common > Reporter: Jose Miguel Arreola > Original Estimate: 24h > Remaining Estimate: 24h > > When running performance tests, we noticed that a lot of time is taken in > resolving the host address. > In our specific scenario, we saw the function > org.apache.hadoop.security.SecurityUtil.getInetAddressByName taking a lot of > time to resolve the hosts, and the same function is called a lot of times. > I saw that org.apache.hadoop.yarn.server.resourcemanager.NodesListManager has > a cached resolver already because of the same reason. > So, the proposal is, to make this cache generic and use it to save some time > in this functions that we already know, but have it available so the cache > can be used anywhere else. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org