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Posted to commits@hbase.apache.org by st...@apache.org on 2010/10/08 21:45:11 UTC
svn commit: r1005990 - in /hbase/trunk/src:
main/java/org/apache/hadoop/hbase/catalog/
main/java/org/apache/hadoop/hbase/master/
main/java/org/apache/hadoop/hbase/regionserver/
test/java/org/apache/hadoop/hbase/
test/java/org/apache/hadoop/hbase/client...
Author: stack
Date: Fri Oct 8 19:45:11 2010
New Revision: 1005990
URL: http://svn.apache.org/viewvc?rev=1005990&view=rev
Log:
HBASE-3094 Fixes for miscellaneous broken tests
M src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
Added passing a Configuration to createTable.
M src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java
Make a new configuration each time we create a cluster else this
old testing utility fails when we do restart in middle of a test
suite using this old stuff.
M src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
Fixed imports.
M src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
Added catch for other than IOE... shutdown if anything thrown.
M src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java
This test was for sure horked. Fixed it so we were testing
the javadoc description of how its supposed to work.
M src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java
Another test that just wasn't working -- couldn't have worked on
commit.
M src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java
Must have resolvable host (How did this test ever work)?
M src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java
Fixup to make this test pass. New Configuration after cluster restart.
M src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
Fixup to make this test pass. The low scanner timeout was stopping
this test from even starting up.
M src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
Use new method from HTU.
M src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
If passed server is null, we are in test mode.
M src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java
Catch other dropped connection exception types when trying to prove
we have a good root/meta address.
Modified:
hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java
hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java
hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java
hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
Modified: hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java (original)
+++ hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java Fri Oct 8 19:45:11 2010
@@ -19,6 +19,7 @@
*/
package org.apache.hadoop.hbase.catalog;
+import java.io.EOFException;
import java.io.IOException;
import java.net.ConnectException;
import java.util.concurrent.atomic.AtomicBoolean;
@@ -355,6 +356,17 @@ public class CatalogTracker {
} else {
throw e;
}
+ } catch (IOException ioe) {
+ Throwable cause = ioe.getCause();
+ if (cause != null && cause instanceof EOFException) {
+ // Catch. Other end disconnected us.
+ } else if (cause != null && cause.getMessage() != null &&
+ cause.getMessage().toLowerCase().contains("connection reset")) {
+ // Catch. Connection reset.
+ } else {
+ throw ioe;
+ }
+
}
return protocol;
}
Modified: hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java (original)
+++ hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java Fri Oct 8 19:45:11 2010
@@ -120,6 +120,7 @@ class CatalogJanitor extends Chore {
* @return Null if not found (and logs fact that expected COL_REGIONINFO
* was missing) else deserialized {@link HRegionInfo}
* @throws IOException
+ * @throws NullPointerException if null cell
*/
static HRegionInfo getHRegionInfo(final Result result)
throws IOException {
Modified: hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java (original)
+++ hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java Fri Oct 8 19:45:11 2010
@@ -184,7 +184,7 @@ class SplitTransaction {
assert !this.parent.lock.writeLock().isHeldByCurrentThread() : "Unsafe to hold write lock while performing RPCs";
// If true, no cluster to write meta edits into.
- boolean testing =
+ boolean testing = server == null? true:
server.getConfiguration().getBoolean("hbase.testing.nocluster", false);
createSplitDir(this.parent.getFilesystem(), this.splitdir);
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java Fri Oct 8 19:45:11 2010
@@ -25,6 +25,7 @@ import java.io.PrintWriter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.client.HConnectionManager;
@@ -102,13 +103,13 @@ public abstract class HBaseClusterTestCa
this.zooKeeperCluster = new MiniZooKeeperCluster();
int clientPort = this.zooKeeperCluster.startup(testDir);
conf.set("hbase.zookeeper.property.clientPort", Integer.toString(clientPort));
-
+ Configuration c = new Configuration(this.conf);
// start the mini cluster
- this.cluster = new MiniHBaseCluster(conf, regionServers);
+ this.cluster = new MiniHBaseCluster(c, regionServers);
if (openMetaTable) {
// opening the META table ensures that cluster is running
- new HTable(conf, HConstants.META_TABLE_NAME);
+ new HTable(c, HConstants.META_TABLE_NAME);
}
}
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java Fri Oct 8 19:45:11 2010
@@ -451,12 +451,27 @@ public class HBaseTestingUtility {
*/
public HTable createTable(byte[] tableName, byte[][] families)
throws IOException {
+ return createTable(tableName, families,
+ new Configuration(getConfiguration()));
+ }
+
+ /**
+ * Create a table.
+ * @param tableName
+ * @param families
+ * @param c Configuration to use
+ * @return An HTable instance for the created table.
+ * @throws IOException
+ */
+ public HTable createTable(byte[] tableName, byte[][] families,
+ final Configuration c)
+ throws IOException {
HTableDescriptor desc = new HTableDescriptor(tableName);
for(byte[] family : families) {
desc.addFamily(new HColumnDescriptor(family));
}
getHBaseAdmin().createTable(desc);
- return new HTable(new Configuration(getConfiguration()), tableName);
+ return new HTable(c, tableName);
}
/**
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java Fri Oct 8 19:45:11 2010
@@ -253,9 +253,12 @@ public class MiniHBaseCluster {
MiniHBaseCluster.MiniHBaseClusterMaster.class,
MiniHBaseCluster.MiniHBaseClusterRegionServer.class);
hbaseCluster.startup();
- } catch(IOException e) {
+ } catch (IOException e) {
shutdown();
throw e;
+ } catch (Throwable t) {
+ shutdown();
+ throw new IOException("Shutting down", t);
}
}
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java Fri Oct 8 19:45:11 2010
@@ -122,7 +122,7 @@ public class TestFromClientSide {
byte[] TABLE = Bytes.toBytes("testGetConfiguration");
byte[][] FAMILIES = new byte[][] { Bytes.toBytes("foo") };
Configuration conf = TEST_UTIL.getConfiguration();
- HTable table = TEST_UTIL.createTable(TABLE, FAMILIES);
+ HTable table = TEST_UTIL.createTable(TABLE, FAMILIES, conf);
assertSame(conf, table.getConfiguration());
}
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestGetRowVersions.java Fri Oct 8 19:45:11 2010
@@ -24,6 +24,7 @@ import java.util.NavigableMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseClusterTestCase;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
@@ -43,35 +44,34 @@ public class TestGetRowVersions extends
private static final byte [] VALUE2 = Bytes.toBytes("value2");
private static final long TIMESTAMP1 = 100L;
private static final long TIMESTAMP2 = 200L;
- private HBaseAdmin admin = null;
- private HTable table = null;
@Override
public void setUp() throws Exception {
super.setUp();
HTableDescriptor desc = new HTableDescriptor(TABLE_NAME);
desc.addFamily(new HColumnDescriptor(CONTENTS));
- this.admin = new HBaseAdmin(conf);
- this.admin.createTable(desc);
- this.table = new HTable(conf, TABLE_NAME);
+ HBaseAdmin admin = new HBaseAdmin(conf);
+ admin.createTable(desc);
}
/** @throws Exception */
public void testGetRowMultipleVersions() throws Exception {
Put put = new Put(ROW, TIMESTAMP1, null);
put.add(CONTENTS, CONTENTS, VALUE1);
- this.table.put(put);
+ HTable table = new HTable(new Configuration(conf), TABLE_NAME);
+ table.put(put);
// Shut down and restart the HBase cluster
this.cluster.shutdown();
this.zooKeeperCluster.shutdown();
LOG.debug("HBase cluster shut down -- restarting");
this.hBaseClusterSetup();
- // Make a new connection
- this.table = new HTable(conf, TABLE_NAME);
+ // Make a new connection. Use new Configuration instance because old one
+ // is tied to an HConnection that has since gone statle.
+ table = new HTable(new Configuration(conf), TABLE_NAME);
// Overwrite previous value
put = new Put(ROW, TIMESTAMP2, null);
put.add(CONTENTS, CONTENTS, VALUE2);
- this.table.put(put);
+ table.put(put);
// Now verify that getRow(row, column, latest) works
Get get = new Get(ROW);
// Should get one version by default
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java Fri Oct 8 19:45:11 2010
@@ -19,6 +19,9 @@
*/
package org.apache.hadoop.hbase.client;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
@@ -26,15 +29,11 @@ import org.apache.hadoop.hbase.HBaseTest
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.util.Bytes;
-import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
/**
* Test various scanner timeout issues.
*/
@@ -47,8 +46,7 @@ public class TestScannerTimeout {
private final static byte[] SOME_BYTES = Bytes.toBytes("f");
private final static byte[] TABLE_NAME = Bytes.toBytes("t");
private final static int NB_ROWS = 10;
- private final static int SCANNER_TIMEOUT = 1000;
- private static HTable table;
+ private final static int SCANNER_TIMEOUT = 10000;
/**
* @throws java.lang.Exception
@@ -58,7 +56,7 @@ public class TestScannerTimeout {
Configuration c = TEST_UTIL.getConfiguration();
c.setInt("hbase.regionserver.lease.period", SCANNER_TIMEOUT);
TEST_UTIL.startMiniCluster(2);
- table = TEST_UTIL.createTable(Bytes.toBytes("t"), SOME_BYTES);
+ HTable table = TEST_UTIL.createTable(TABLE_NAME, SOME_BYTES);
for (int i = 0; i < NB_ROWS; i++) {
Put put = new Put(Bytes.toBytes(i));
put.add(SOME_BYTES, SOME_BYTES, SOME_BYTES);
@@ -89,6 +87,8 @@ public class TestScannerTimeout {
@Test
public void test2481() throws Exception {
Scan scan = new Scan();
+ HTable table =
+ new HTable(new Configuration(TEST_UTIL.getConfiguration()), TABLE_NAME);
ResultScanner r = table.getScanner(scan);
int count = 0;
try {
@@ -131,6 +131,5 @@ public class TestScannerTimeout {
Result[] results = r.next(NB_ROWS);
assertEquals(NB_ROWS, results.length);
r.close();
-
}
-}
+}
\ No newline at end of file
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java Fri Oct 8 19:45:11 2010
@@ -168,19 +168,14 @@ public class TestCatalogJanitor {
// Make a key that does not have a regioninfo value.
kvs.add(new KeyValue(HConstants.EMPTY_BYTE_ARRAY, f,
HConstants.REGIONINFO_QUALIFIER, f));
- boolean exception = false;
- try {
- CatalogJanitor.getHRegionInfo(new Result(kvs));
- } catch (Exception ioe) {
- exception = true;
- }
- assertTrue(exception);
+ HRegionInfo hri = CatalogJanitor.getHRegionInfo(new Result(kvs));
+ assertTrue(hri == null);
// OK, give it what it expects
kvs.clear();
kvs.add(new KeyValue(HConstants.EMPTY_BYTE_ARRAY, f,
HConstants.REGIONINFO_QUALIFIER,
Writables.getBytes(HRegionInfo.FIRST_META_REGIONINFO)));
- HRegionInfo hri = CatalogJanitor.getHRegionInfo(new Result(kvs));
+ hri = CatalogJanitor.getHRegionInfo(new Result(kvs));
assertNotNull(hri);
assertTrue(hri.equals(HRegionInfo.FIRST_META_REGIONINFO));
}
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestDeadServer.java Fri Oct 8 19:45:11 2010
@@ -17,25 +17,22 @@
*/
package org.apache.hadoop.hbase.master;
-import static org.junit.Assert.*;
-
-import java.util.HashSet;
-import java.util.Set;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class TestDeadServer {
@Test public void testIsDead() {
- Set<String> deadServers = new HashSet<String>();
DeadServer ds = new DeadServer();
- final String hostname123 = "one,123,3";
+ final String hostname123 = "127.0.0.1,123,3";
assertFalse(ds.isDeadServer(hostname123, false));
assertFalse(ds.isDeadServer(hostname123, true));
- deadServers.add(hostname123);
+ ds.add(hostname123);
assertTrue(ds.isDeadServer(hostname123, false));
- assertFalse(ds.isDeadServer("one:1", true));
- assertFalse(ds.isDeadServer("one:1234", true));
- assertTrue(ds.isDeadServer("one:123", true));
+ assertFalse(ds.isDeadServer("127.0.0.1:1", true));
+ assertFalse(ds.isDeadServer("127.0.0.1:1234", true));
+ assertTrue(ds.isDeadServer("127.0.0.1:123", true));
}
}
\ No newline at end of file
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java Fri Oct 8 19:45:11 2010
@@ -352,7 +352,7 @@ public class TestLoadBalancer {
server.getLoad().setNumberOfRegions(numRegions);
return server;
}
- String host = RandomStringUtils.random(16);
+ String host = "127.0.0.1";
int port = rand.nextInt(60000);
long startCode = rand.nextLong();
HServerInfo hsi =
Modified: hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java?rev=1005990&r1=1005989&r2=1005990&view=diff
==============================================================================
--- hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java (original)
+++ hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java Fri Oct 8 19:45:11 2010
@@ -19,6 +19,17 @@
*/
package org.apache.hadoop.hbase.regionserver;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
@@ -51,27 +62,14 @@ import org.apache.hadoop.hbase.regionser
import org.apache.hadoop.hbase.regionserver.wal.HLog;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManagerTestHelper;
-import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.IncrementingEnvironmentEdge;
import org.apache.hadoop.hbase.util.ManualEnvironmentEdge;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.PairOfSameType;
import org.apache.hadoop.hbase.util.Threads;
-import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
-
/**
* Basic stand-alone testing of HRegion.