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From te...@apache.org
Subject hbase git commit: HBASE-15456 CreateTableProcedure/ModifyTableProcedure needs to fail when there is no family in table descriptor (huaxiang sun)
Date Fri, 18 Mar 2016 17:22:01 GMT
Repository: hbase
Updated Branches:
  refs/heads/master 8c031e9d6 -> 3a6d683d6


HBASE-15456 CreateTableProcedure/ModifyTableProcedure needs to fail when there is no family
in table descriptor (huaxiang sun)


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/3a6d683d
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/3a6d683d
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/3a6d683d

Branch: refs/heads/master
Commit: 3a6d683d63089c1986e68e531939df7328e58300
Parents: 8c031e9
Author: tedyu <yuzhihong@gmail.com>
Authored: Fri Mar 18 10:21:43 2016 -0700
Committer: tedyu <yuzhihong@gmail.com>
Committed: Fri Mar 18 10:21:43 2016 -0700

----------------------------------------------------------------------
 .../master/procedure/CreateTableProcedure.java  |  9 +++++++
 .../master/procedure/ModifyTableProcedure.java  |  7 ++++++
 .../hadoop/hbase/regionserver/HRegion.java      |  7 ++++++
 .../procedure/TestCreateTableProcedure.java     | 24 +++++++++++++++++++
 .../procedure/TestModifyTableProcedure.java     | 24 +++++++++++++++++--
 .../hbase/namespace/TestNamespaceAuditor.java   | 25 ++++++++++++++++++++
 .../hadoop/hbase/util/TestRegionMover.java      |  4 ++++
 .../hadoop/hbase/thrift/TestThriftServer.java   |  2 +-
 8 files changed, 99 insertions(+), 3 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
index 183871d..8ce8335 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
@@ -31,6 +31,7 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HTableDescriptor;
 import org.apache.hadoop.hbase.MetaTableAccessor;
@@ -283,6 +284,14 @@ public class CreateTableProcedure
       setFailure("master-create-table", new TableExistsException(getTableName()));
       return false;
     }
+
+    // check that we have at least 1 CF
+    if (hTableDescriptor.getColumnFamilies().length == 0) {
+      setFailure("master-create-table", new DoNotRetryIOException("Table " +
+          getTableName().toString() + " should have at least one column family."));
+      return false;
+    }
+
     return true;
   }
 

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
index 9231639..bd1451a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
@@ -29,6 +29,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HTableDescriptor;
@@ -285,6 +286,12 @@ public class ModifyTableProcedure
       throw new TableNotFoundException(getTableName());
     }
 
+    // check that we have at least 1 CF
+    if (modifiedHTableDescriptor.getColumnFamilies().length == 0) {
+      throw new DoNotRetryIOException("Table " + getTableName().toString() +
+        " should have at least one column family.");
+    }
+
     // In order to update the descriptor, we need to retrieve the old descriptor for comparison.
     this.unmodifiedHTableDescriptor =
         env.getMasterServices().getTableDescriptors().get(getTableName());

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
index a35b9f1..a17df8c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
@@ -785,6 +785,13 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver,
Regi
    * @throws IOException e
    */
   private long initialize(final CancelableProgressable reporter) throws IOException {
+
+    //Refuse to open the region if there is no column family in the table
+    if (htableDescriptor.getColumnFamilies().length == 0) {
+      throw new DoNotRetryIOException("Table " + htableDescriptor.getNameAsString() +
+          " should have at least one column family.");
+    }
+
     MonitoredTask status = TaskMonitor.get().createStatus("Initializing region " + this);
     long nextSeqId = -1;
     try {

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCreateTableProcedure.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCreateTableProcedure.java
b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCreateTableProcedure.java
index 676a3f4..8f6e11a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCreateTableProcedure.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCreateTableProcedure.java
@@ -23,10 +23,12 @@ import java.io.IOException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.ProcedureInfo;
 import org.apache.hadoop.hbase.TableExistsException;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
@@ -43,6 +45,7 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 @Category({MasterTests.class, MediumTests.class})
@@ -119,6 +122,27 @@ public class TestCreateTableProcedure {
       UTIL.getHBaseCluster().getMaster(), tableName, regions, "f1", "f2");
   }
 
+  @Test(timeout=60000)
+  public void testCreateWithoutColumnFamily() throws Exception {
+    final ProcedureExecutor<MasterProcedureEnv> procExec = getMasterProcedureExecutor();
+    final TableName tableName = TableName.valueOf("testCreateWithoutColumnFamily");
+    // create table with 0 families will fail
+    final HTableDescriptor htd = MasterProcedureTestingUtility.createHTD(tableName);
+
+    // disable sanity check
+    htd.setConfiguration("hbase.table.sanity.checks", Boolean.FALSE.toString());
+    final HRegionInfo[] regions = ModifyRegionUtils.createHRegionInfos(htd, null);
+
+    long procId =
+        ProcedureTestingUtility.submitAndWait(procExec,
+            new CreateTableProcedure(procExec.getEnvironment(), htd, regions));
+    final ProcedureInfo result = procExec.getResult(procId);
+    assertEquals(true, result.isFailed());
+    Throwable cause = ProcedureTestingUtility.getExceptionCause(result);
+    assertTrue("expected DoNotRetryIOException, got " + cause,
+        cause instanceof DoNotRetryIOException);
+  }
+
   @Test(timeout=60000, expected=TableExistsException.class)
   public void testCreateExisting() throws Exception {
     final TableName tableName = TableName.valueOf("testCreateExisting");

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestModifyTableProcedure.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestModifyTableProcedure.java
b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestModifyTableProcedure.java
index ebe70d2..ab86eda 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestModifyTableProcedure.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestModifyTableProcedure.java
@@ -25,11 +25,13 @@ import static org.junit.Assert.assertTrue;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.ProcedureInfo;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
 import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
@@ -168,12 +170,13 @@ public class TestModifyTableProcedure {
 
   @Test(timeout = 60000)
   public void testModifyTableDeleteCF() throws Exception {
-    final TableName tableName = TableName.valueOf("testModifyTableAddCF");
+    final TableName tableName = TableName.valueOf("testModifyTableDeleteCF");
+    final String cf1 = "cf1";
     final String cf2 = "cf2";
     final String cf3 = "cf3";
     final ProcedureExecutor<MasterProcedureEnv> procExec = getMasterProcedureExecutor();
 
-    MasterProcedureTestingUtility.createTable(procExec, tableName, null, "cf1", cf2, cf3);
+    MasterProcedureTestingUtility.createTable(procExec, tableName, null, cf1, cf2, cf3);
     HTableDescriptor currentHtd = UTIL.getHBaseAdmin().getTableDescriptor(tableName);
     assertEquals(3, currentHtd.getFamiliesKeys().size());
 
@@ -196,6 +199,8 @@ public class TestModifyTableProcedure {
     HTableDescriptor htd2 =
         new HTableDescriptor(UTIL.getHBaseAdmin().getTableDescriptor(tableName));
     htd2.removeFamily(cf3.getBytes());
+    // Disable Sanity check
+    htd2.setConfiguration("hbase.table.sanity.checks", Boolean.FALSE.toString());
 
     long procId2 =
         ProcedureTestingUtility.submitAndWait(procExec,
@@ -205,6 +210,21 @@ public class TestModifyTableProcedure {
     currentHtd = UTIL.getHBaseAdmin().getTableDescriptor(tableName);
     assertEquals(1, currentHtd.getFamiliesKeys().size());
     assertFalse(currentHtd.hasFamily(cf3.getBytes()));
+
+    //Removing the last family will fail
+    HTableDescriptor htd3 =
+        new HTableDescriptor(UTIL.getHBaseAdmin().getTableDescriptor(tableName));
+    htd3.removeFamily(cf1.getBytes());
+    long procId3 =
+        ProcedureTestingUtility.submitAndWait(procExec,
+            new ModifyTableProcedure(procExec.getEnvironment(), htd3));
+    final ProcedureInfo result = procExec.getResult(procId3);
+    assertEquals(true, result.isFailed());
+    Throwable cause = ProcedureTestingUtility.getExceptionCause(result);
+    assertTrue("expected DoNotRetryIOException, got " + cause,
+        cause instanceof DoNotRetryIOException);
+    assertEquals(1, currentHtd.getFamiliesKeys().size());
+    assertTrue(currentHtd.hasFamily(cf1.getBytes()));
   }
 
   @Test(timeout=60000)

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/test/java/org/apache/hadoop/hbase/namespace/TestNamespaceAuditor.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/namespace/TestNamespaceAuditor.java
b/hbase-server/src/test/java/org/apache/hadoop/hbase/namespace/TestNamespaceAuditor.java
index e3b841b..78fde21 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/namespace/TestNamespaceAuditor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/namespace/TestNamespaceAuditor.java
@@ -148,12 +148,17 @@ public class TestNamespaceAuditor {
     ADMIN.createNamespace(nspDesc);
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
     assertEquals(ADMIN.listNamespaceDescriptors().length, 3);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
+
     HTableDescriptor tableDescOne =
         new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1"));
+    tableDescOne.addFamily(fam1);
     HTableDescriptor tableDescTwo =
         new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table2"));
+    tableDescTwo.addFamily(fam1);
     HTableDescriptor tableDescThree =
         new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table3"));
+    tableDescThree.addFamily(fam1);
     ADMIN.createTable(tableDescOne);
     boolean constraintViolated = false;
     try {
@@ -252,10 +257,13 @@ public class TestNamespaceAuditor {
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(namespace));
     NamespaceTableAndRegionInfo stateInfo = getNamespaceState(nspDesc.getName());
     assertNotNull("Namespace state found null for " + namespace, stateInfo);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
     HTableDescriptor tableDescOne =
         new HTableDescriptor(TableName.valueOf(namespace + TableName.NAMESPACE_DELIM + "table1"));
+    tableDescOne.addFamily(fam1);
     HTableDescriptor tableDescTwo =
         new HTableDescriptor(TableName.valueOf(namespace + TableName.NAMESPACE_DELIM + "table2"));
+    tableDescTwo.addFamily(fam1);
     ADMIN.createTable(tableDescOne);
     ADMIN.createTable(tableDescTwo, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 5);
     stateInfo = getNamespaceState(nspDesc.getName());
@@ -598,9 +606,13 @@ public class TestNamespaceAuditor {
     TableName tableOne = TableName.valueOf(nsp1 + TableName.NAMESPACE_DELIM + "table1");
     TableName tableTwo = TableName.valueOf(nsp1 + TableName.NAMESPACE_DELIM + "table2");
     TableName tableThree = TableName.valueOf(nsp1 + TableName.NAMESPACE_DELIM + "table3");
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
     HTableDescriptor tableDescOne = new HTableDescriptor(tableOne);
+    tableDescOne.addFamily(fam1);
     HTableDescriptor tableDescTwo = new HTableDescriptor(tableTwo);
+    tableDescTwo.addFamily(fam1);
     HTableDescriptor tableDescThree = new HTableDescriptor(tableThree);
+    tableDescThree.addFamily(fam1);
     ADMIN.createTable(tableDescOne, Bytes.toBytes("1"), Bytes.toBytes("1000"), 3);
     ADMIN.createTable(tableDescTwo, Bytes.toBytes("1"), Bytes.toBytes("1000"), 3);
     ADMIN.createTable(tableDescThree, Bytes.toBytes("1"), Bytes.toBytes("1000"), 4);
@@ -690,10 +702,13 @@ public class TestNamespaceAuditor {
     ADMIN.createNamespace(nspDesc);
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
     assertEquals(ADMIN.listNamespaceDescriptors().length, 3);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
     HTableDescriptor tableDescOne =
         new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1"));
+    tableDescOne.addFamily(fam1);
     HTableDescriptor tableDescTwo =
         new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table2"));
+    tableDescTwo.addFamily(fam1);
     ADMIN.createTable(tableDescOne);
     ADMIN.createTable(tableDescTwo, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 4);
   }
@@ -708,7 +723,9 @@ public class TestNamespaceAuditor {
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
     TableName tableName = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1");
     TableName cloneTableName = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table2");
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
     HTableDescriptor tableDescOne = new HTableDescriptor(tableName);
+    tableDescOne.addFamily(fam1);
     ADMIN.createTable(tableDescOne);
     String snapshot = "snapshot_testTableQuotaExceedWithCloneSnapshot";
     ADMIN.snapshot(snapshot, tableName);
@@ -726,7 +743,10 @@ public class TestNamespaceAuditor {
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
     TableName tableName = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1");
     TableName cloneTableName = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table2");
+
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
     HTableDescriptor tableDescOne = new HTableDescriptor(tableName);
+    tableDescOne.addFamily(fam1);
 
     ADMIN.createTable(tableDescOne, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 4);
     String snapshot = "snapshot_testCloneSnapshot";
@@ -761,6 +781,8 @@ public class TestNamespaceAuditor {
     assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
     TableName tableName1 = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1");
     HTableDescriptor tableDescOne = new HTableDescriptor(tableName1);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
+    tableDescOne.addFamily(fam1);
     ADMIN.createTable(tableDescOne, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 4);
 
     NamespaceTableAndRegionInfo nstate = getNamespaceState(nsp);
@@ -796,6 +818,9 @@ public class TestNamespaceAuditor {
     assertNotNull("Namespace descriptor found null.", ndesc);
     TableName tableName1 = TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1");
     HTableDescriptor tableDescOne = new HTableDescriptor(tableName1);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
+    tableDescOne.addFamily(fam1);
+
     ADMIN.createTable(tableDescOne, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 4);
 
     NamespaceTableAndRegionInfo nstate = getNamespaceState(nsp);

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMover.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMover.java
b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMover.java
index 0ecf1eb..a75ff2b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMover.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionMover.java
@@ -35,6 +35,7 @@ import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.util.RegionMover.RegionMoverBuilder;
+import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -70,6 +71,9 @@ public class TestRegionMover {
       TEST_UTIL.deleteTable(tableName);
     }
     HTableDescriptor tableDesc = new HTableDescriptor(tableName);
+    HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
+    tableDesc.addFamily(fam1);
+
     try {
       admin.setBalancerRunning(false, true);
       String startKey = "a";

http://git-wip-us.apache.org/repos/asf/hbase/blob/3a6d683d/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
----------------------------------------------------------------------
diff --git a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
index d5a020e..19245ea 100644
--- a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
+++ b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
@@ -233,7 +233,7 @@ public class TestThriftServer {
     assertEquals(handler.getTableNames().size(), 1);
     assertEquals(handler.getColumnDescriptors(tableAname).size(), 2);
     assertTrue(handler.isTableEnabled(tableAname));
-    handler.createTable(tableBname, new ArrayList<ColumnDescriptor>());
+    handler.createTable(tableBname, getColumnDescriptors());
     assertEquals(handler.getTableNames().size(), 2);
   }
 


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