[ https://issues.apache.org/jira/browse/HBASE-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack resolved HBASE-3772. -------------------------- Resolution: Cannot Reproduce Resolving 'cannot reproduce'. I don't think we have this issue anymore. We can open new issue if we run into it again. > Hadoop DNS.reverseDns() doesn't canonicalize host names, leading to possible > discrepancy in RS hostname vs. Master seen hostname for RS > --------------------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-3772 > URL: https://issues.apache.org/jira/browse/HBASE-3772 > Project: HBase > Issue Type: Bug > Reporter: Gary Helmling > > I ran across this issue on a 0.20 based branch, so I'm not sure if this is > still an issue for 0.90+. However, 0.90 and current trunk do still make use > of DNS.getDefaultHost(), so I wanted to open this for discussion. > In 0.20, the problem was: > 1. configure hbase-site.xml with hbase.regionserver.dns.interface=xxx > 2. IP bound on interface xxx has reverse DNS correctly configured > 3. DNS.getDefaultHost() calls DNS.reverseDns() for this IP, which does a > JNDI bind to the DNS provider, returning the *absolute* hostname: > host1.my.domain. > 4. RS reports startup to master as host1.my.domain.,60020,1234... > 5. BaseScanner when scanning .META. sees region assignments as not valid > because the resolved hostname from IP goes through > InetSocketAddress.getHostName() which returns the canonicalized form > (host1.my.domain != host1.my.domain. though they are equivalent) > I know the master <-> RS negotiated hostname has completely changed for 0.90. > So hopefully this is no longer an issue and we can close as invalid and go > have a beer. But given the underlying problem in DNS.getDefaultHost(), I > wanted to confirm this. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira