[jira] [Created] (HIVE-14379) Queries on tables with remote HDFS paths fail in "encryption" checks.

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

Mithun Radhakrishnan created HIVE-14379:
-------------------------------------------

             Summary: Queries on tables with remote HDFS paths fail in "encryption" checks.
                 Key: HIVE-14379
                 URL: https://issues.apache.org/jira/browse/HIVE-14379
             Project: Hive
          Issue Type: Bug
          Components: Encryption
            Reporter: Mithun Radhakrishnan
            Assignee: Mithun Radhakrishnan


If a table has table/partition locations set to remote HDFS paths, querying them will cause the following IAException:

{noformat}
2016-07-26 01:16:27,471 ERROR parse.CalcitePlanner (SemanticAnalyzer.java:getMetaData(1867)) - org.apache.hadoop.hive.ql.metadata.HiveException: Unable to deter
mine if hdfs://foo.ygrid.yahoo.com:8020/projects/my_db/my_table is encrypted: java.lang.IllegalArgumentException: Wrong FS: hdfs://foo.ygrid.yahoo.com:8020/projects/my_db/my_table, expected: hdfs://bar.ygrid.yahoo.com:8020
        at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.isPathEncrypted(SemanticAnalyzer.java:2204)
        at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.getStrongestEncryptedTablePath(SemanticAnalyzer.java:2274)
...
{noformat}

This is because of the following code in {{SessionState}}:
{code:title=SessionState.java|borderStyle=solid}
 public HadoopShims.HdfsEncryptionShim getHdfsEncryptionShim() throws HiveException {
    if (hdfsEncryptionShim == null) {
      try {
        FileSystem fs = FileSystem.get(sessionConf);
        if ("hdfs".equals(fs.getUri().getScheme())) {
          hdfsEncryptionShim = ShimLoader.getHadoopShims().createHdfsEncryptionShim(fs, sessionConf);
        } else {
          LOG.debug("Could not get hdfsEncryptionShim, it is only applicable to hdfs filesystem.");
        }
      } catch (Exception e) {
        throw new HiveException(e);
      }
    }

    return hdfsEncryptionShim;
  }
{code}

When the {{FileSystem}} instance is created, using the {{sessionConf}} implies that the current HDFS is going to be used. This call should instead fetch the {{FileSystem}} instance corresponding to the path being checked.

A fix is forthcoming...



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