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https://issues.apache.org/jira/browse/HDFS-8307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated HDFS-8307:
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Target Version/s: 2.7.3 (was: 2.7.2)
Moving out all non-critical / non-blocker issues that didn't make it out of
2.7.2 into 2.7.3.
> Spurious DNS Queries from hdfs shell
> ------------------------------------
>
> Key: HDFS-8307
> URL: https://issues.apache.org/jira/browse/HDFS-8307
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.7.1
> Reporter: Anu Engineer
> Priority: Trivial
>
> With HA configured the hdfs shell (org.apache.hadoop.fs.FsShell) seems to
> issue a DNS query for the cluster Name. if fs.defaultFS is set to
> hdfs://mycluster, then the shell seems to issue a DNS query for
> mycluster.FQDN or mycluster.
> since mycluster not a machine name DNS query always fails with
> "DNS 85 Standard query response 0x2aeb No such name"
> Repro Steps:
> # Setup a HA cluster
> # Log on to any node
> # Run wireshark monitoring port 53 - "sudo tshark 'port 53'"
> # Run "sudo -u hdfs hdfs dfs -ls /"
> # You should be able to see DNS queries to mycluster.FQDN in wireshark
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