[jira] [Created] (HIVE-17218) Canonical-ize hostnames for Hive metastore, and HS2 servers.

["Mithun Radhakrishnan (JIRA)" <ji...@apache.org>]

Mithun Radhakrishnan created HIVE-17218:
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             Summary: Canonical-ize hostnames for Hive metastore, and HS2 servers.
                 Key: HIVE-17218
                 URL: https://issues.apache.org/jira/browse/HIVE-17218
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2, Metastore, Security
    Affects Versions: 2.2.0, 1.2.2, 3.0.0
            Reporter: Mithun Radhakrishnan
            Assignee: Mithun Radhakrishnan


Currently, the {{HiveMetastoreClient}} and {{HiveConnection}} do not canonical-ize the hostnames of the metastore/HS2 servers. In deployments where there are multiple such servers behind a VIP, this causes a number of inconveniences:
# The client-side configuration (e.g. {{hive.metastore.uris}} in {{hive-site.xml}}) needs to specify the VIP's hostname, and cannot use a simplified CNAME, in the thrift URL. If the {{hive.metastore.kerberos.principal}} is specified using {{_HOST}}, one sees GSS failures as follows:
{noformat}
hive --hiveconf hive.metastore.kerberos.principal=hive/_HOST@GRID.MYTH.NET --hiveconf hive.metastore.uris="thrift://simplified-hcat-cname.grid.myth.net:56789"
...
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:542)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
...
{noformat}
This is because {{_HOST}} is filled in with the CNAME, and not the canonicalized name.
# Oozie workflows that use HCat {{<credential>}} have to always use the VIP hostname, and can't use {{_HOST}}-based service principals, if the CNAME differs from the VIP name.

If the client-code simply canonical-ized the hostnames, it would enable the use of both simplified CNAMEs, and _HOST in service principals.



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