@Test public void createTableTest() throws IOException, InterruptedException { String testName = "createTableTest"; String nsName = prefix + "_" + testName; LOG.info(testName); HTableDescriptor desc = new HTableDescriptor(TableName.valueOf(nsName + ":my_table")); HColumnDescriptor colDesc = new HColumnDescriptor("my_cf"); desc.addFamily(colDesc); try { admin.createTable(desc); fail("Expected no namespace exists exception"); } catch (NamespaceNotFoundException ex) { } // create table and in new namespace admin.createNamespace(NamespaceDescriptor.create(nsName).build()); admin.createTable(desc); TEST_UTIL.waitTableAvailable(desc.getTableName().getName(), 10000); FileSystem fs = FileSystem.get(TEST_UTIL.getConfiguration()); assertTrue( fs.exists( new Path( master.getMasterFileSystem().getRootDir(), new Path( HConstants.BASE_NAMESPACE_DIR, new Path(nsName, desc.getTableName().getQualifierAsString()))))); assertEquals(1, admin.listTables().length); // verify non-empty namespace can't be removed try { admin.deleteNamespace(nsName); fail("Expected non-empty namespace constraint exception"); } catch (Exception ex) { LOG.info("Caught expected exception: " + ex); } // sanity check try to write and read from table Table table = TEST_UTIL.getConnection().getTable(desc.getTableName()); Put p = new Put(Bytes.toBytes("row1")); p.add(Bytes.toBytes("my_cf"), Bytes.toBytes("my_col"), Bytes.toBytes("value1")); table.put(p); // flush and read from disk to make sure directory changes are working admin.flush(desc.getTableName()); Get g = new Get(Bytes.toBytes("row1")); assertTrue(table.exists(g)); // normal case of removing namespace TEST_UTIL.deleteTable(desc.getTableName()); admin.deleteNamespace(nsName); }