aws-glue-datacatalog-spark-client/src/main/java/com/amazonaws/glue/catalog/metastore/AWSCatalogMetastoreClient.java [1340:1363]:
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  private void verifyDestinationLocation(FileSystem srcFs, FileSystem destFs, Path srcPath, Path destPath, org.apache.hadoop.hive.metastore.api.Table tbl, org.apache.hadoop.hive.metastore.api.Partition newPartition)
        throws InvalidOperationException {
      String oldPartLoc = srcPath.toString();
      String newPartLoc = destPath.toString();

      // check that src and dest are on the same file system
      if (!FileUtils.equalsFileSystem(srcFs, destFs)) {
          throw new InvalidOperationException("table new location " + destPath
                + " is on a different file system than the old location "
                + srcPath + ". This operation is not supported");
      }
      try {
          srcFs.exists(srcPath); // check that src exists and also checks
          if (newPartLoc.compareTo(oldPartLoc) != 0 && destFs.exists(destPath)) {
              throw new InvalidOperationException("New location for this partition "
                    + tbl.getDbName() + "." + tbl.getTableName() + "." + newPartition.getValues()
                    + " already exists : " + destPath);
          }
      } catch (IOException e) {
          throw new InvalidOperationException("Unable to access new location "
                + destPath + " for partition " + tbl.getDbName() + "."
                + tbl.getTableName() + " " + newPartition.getValues());
      }
  }
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aws-glue-datacatalog-hive2-client/src/main/java/com/amazonaws/glue/catalog/metastore/AWSCatalogMetastoreClient.java [1491:1514]:
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  private void verifyDestinationLocation(FileSystem srcFs, FileSystem destFs, Path srcPath, Path destPath, org.apache.hadoop.hive.metastore.api.Table tbl, org.apache.hadoop.hive.metastore.api.Partition newPartition)
        throws InvalidOperationException {
    String oldPartLoc = srcPath.toString();
    String newPartLoc = destPath.toString();

    // check that src and dest are on the same file system
    if (!FileUtils.equalsFileSystem(srcFs, destFs)) {
      throw new InvalidOperationException("table new location " + destPath
            + " is on a different file system than the old location "
            + srcPath + ". This operation is not supported");
    }
    try {
      srcFs.exists(srcPath); // check that src exists and also checks
      if (newPartLoc.compareTo(oldPartLoc) != 0 && destFs.exists(destPath)) {
        throw new InvalidOperationException("New location for this partition "
              + tbl.getDbName() + "." + tbl.getTableName() + "." + newPartition.getValues()
              + " already exists : " + destPath);
      }
    } catch (IOException e) {
      throw new InvalidOperationException("Unable to access new location "
            + destPath + " for partition " + tbl.getDbName() + "."
            + tbl.getTableName() + " " + newPartition.getValues());
    }
  }
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