HBASE-18662 The default values for many configuration items in the code are not consistent with hbase-default.xml

Signed-off-by: Chia-Ping Tsai <chia7712@gmail.com>

hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionConfiguration.java

@@ -31,7 +31,7 @@ public class ConnectionConfiguration {
   public static final String WRITE_BUFFER_SIZE_KEY = "hbase.client.write.buffer";
   public static final long WRITE_BUFFER_SIZE_DEFAULT = 2097152;
   public static final String MAX_KEYVALUE_SIZE_KEY = "hbase.client.keyvalue.maxsize";
-  public static final int MAX_KEYVALUE_SIZE_DEFAULT = -1;
+  public static final int MAX_KEYVALUE_SIZE_DEFAULT = 10485760;
 
   private final long writeBufferSize;
   private final int metaOperationTimeout;

hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java

@@ -229,7 +229,7 @@ public final class HConstants {
   public static final String ZK_SESSION_TIMEOUT = "zookeeper.session.timeout";
 
   /** Default value for ZooKeeper session timeout */
-  public static final int DEFAULT_ZK_SESSION_TIMEOUT = 180 * 1000;
+  public static final int DEFAULT_ZK_SESSION_TIMEOUT = 90 * 1000;
 
   /** Parameter name for port region server listens on. */
   public static final String REGIONSERVER_PORT = "hbase.regionserver.port";
@@ -719,7 +719,7 @@ public final class HConstants {
   /**
    * Default value of {@link #HBASE_CLIENT_MAX_PERSERVER_TASKS}.
    */
-  public static final int DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS = 2;
+  public static final int DEFAULT_HBASE_CLIENT_MAX_PERSERVER_TASKS = 5;
 
   /**
    * The maximum number of concurrent connections the client will maintain to a single
@@ -765,7 +765,7 @@ public final class HConstants {
   /**
    * Default value of {@link #HBASE_CLIENT_RETRIES_NUMBER}.
    */
-  public static final int DEFAULT_HBASE_CLIENT_RETRIES_NUMBER = 31;
+  public static final int DEFAULT_HBASE_CLIENT_RETRIES_NUMBER = 35;
 
   /**
    * Parameter name to set the default scanner caching for all clients.
@@ -1309,7 +1309,7 @@ public final class HConstants {
 
   public static final String SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT =
       "hbase.snapshot.restore.take.failsafe.snapshot";
-  public static final boolean DEFAULT_SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT = false;
+  public static final boolean DEFAULT_SNAPSHOT_RESTORE_TAKE_FAILSAFE_SNAPSHOT = true;
 
   public static final String SNAPSHOT_RESTORE_FAILSAFE_NAME =
       "hbase.snapshot.restore.failsafe.name";

hbase-common/src/main/resources/hbase-default.xml

@@ -323,7 +323,7 @@ possible configurations would overwhelm and obscure the important.
     <description>
       A split policy determines when a region should be split. The various other split policies that
       are available currently are BusyRegionSplitPolicy, ConstantSizeRegionSplitPolicy, DisabledRegionSplitPolicy,
-      DelimitedKeyPrefixRegionSplitPolicy, and KeyPrefixRegionSplitPolicy.
+      DelimitedKeyPrefixRegionSplitPolicy, KeyPrefixRegionSplitPolicy, and SteppingSplitPolicy.
       DisabledRegionSplitPolicy blocks manual region splitting.
     </description>
   </property>

hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RESTServer.java

@@ -41,6 +41,7 @@ import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
 import org.apache.hadoop.hbase.http.InfoServer;
 import org.apache.hadoop.hbase.rest.filter.AuthFilter;
+import org.apache.hadoop.hbase.rest.filter.GzipFilter;
 import org.apache.hadoop.hbase.rest.filter.RestCsrfPreventionFilter;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.util.DNS;
@@ -335,7 +336,7 @@ public class RESTServer implements Constants {
 
     // Load filters from configuration.
     String[] filterClasses = servlet.getConfiguration().getStrings(FILTER_CLASSES,
-      ArrayUtils.EMPTY_STRING_ARRAY);
+        GzipFilter.class.getName());
     for (String filter : filterClasses) {
       filter = filter.trim();
       ctxHandler.addFilter(filter, PATH_SPEC_ANY, EnumSet.of(DispatcherType.REQUEST));

hbase-server/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java

@@ -513,10 +513,10 @@ public class HttpServer implements FilterContainer {
     final String appDir = getWebAppsPath(b.name);
 
 
-    int maxThreads = b.conf.getInt(HTTP_MAX_THREADS, -1);
+    int maxThreads = b.conf.getInt(HTTP_MAX_THREADS, 16);
-    // If HTTP_MAX_THREADS is not configured, QueueThreadPool() will use the
+    // If HTTP_MAX_THREADS is less than or equal to 0, QueueThreadPool() will use the
-    // default value (currently 250).
+    // default value (currently 200).
-    QueuedThreadPool threadPool = maxThreads == -1 ? new QueuedThreadPool()
+    QueuedThreadPool threadPool = maxThreads <= 0 ? new QueuedThreadPool()
         : new QueuedThreadPool(maxThreads);
     threadPool.setDaemon(true);
     this.webServer = new Server(threadPool);

hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcExecutor.java

@@ -112,7 +112,7 @@ public abstract class RpcExecutor {
     this.conf = conf;
     this.abortable = abortable;
 
-    float callQueuesHandlersFactor = this.conf.getFloat(CALL_QUEUE_HANDLER_FACTOR_CONF_KEY, 0);
+    float callQueuesHandlersFactor = this.conf.getFloat(CALL_QUEUE_HANDLER_FACTOR_CONF_KEY, 0.1f);
     this.numCallQueues = computeNumCallQueues(handlerCount, callQueuesHandlersFactor);
     this.queues = new ArrayList<>(this.numCallQueues);
 

hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/RegionNormalizerChore.java

@@ -38,7 +38,7 @@ public class RegionNormalizerChore extends ScheduledChore {
 
   public RegionNormalizerChore(HMaster master) {
     super(master.getServerName() + "-RegionNormalizerChore", master,
-      master.getConfiguration().getInt("hbase.normalizer.period", 300000));
+      master.getConfiguration().getInt("hbase.normalizer.period", 1800000));
     this.master = master;
   }
 

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java

@@ -124,7 +124,7 @@ public class HStore implements Store {
   // keep in accordance with HDFS default storage policy
   public static final String DEFAULT_BLOCK_STORAGE_POLICY = "HOT";
   public static final int DEFAULT_COMPACTCHECKER_INTERVAL_MULTIPLIER = 1000;
-  public static final int DEFAULT_BLOCKING_STOREFILE_COUNT = 7;
+  public static final int DEFAULT_BLOCKING_STOREFILE_COUNT = 10;
 
   private static final Log LOG = LogFactory.getLog(HStore.class);
 

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java

@@ -33,6 +33,7 @@ import org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;
 
 /**
  * A split policy determines when a region should be split.
+ * @see SteppingSplitPolicy Default split policy since 2.0.0
  * @see IncreasingToUpperBoundRegionSplitPolicy Default split policy since
  *      0.94.0
  * @see ConstantSizeRegionSplitPolicy Default split policy before 0.94.0
@@ -40,7 +41,7 @@ import org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;
 @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
 public abstract class RegionSplitPolicy extends Configured {
   private static final Class<? extends RegionSplitPolicy>
-    DEFAULT_SPLIT_POLICY_CLASS = IncreasingToUpperBoundRegionSplitPolicy.class;
+    DEFAULT_SPLIT_POLICY_CLASS = SteppingSplitPolicy.class;
 
   /**
    * The region configured for this split policy.

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java

@@ -216,7 +216,7 @@ public class FSHLog extends AbstractFSWAL<Writer> {
       FSUtils.getDefaultReplication(fs, this.walDir));
     this.lowReplicationRollLimit = conf.getInt("hbase.regionserver.hlog.lowreplication.rolllimit",
       5);
-    this.closeErrorsTolerated = conf.getInt("hbase.regionserver.logroll.errors.tolerated", 0);
+    this.closeErrorsTolerated = conf.getInt("hbase.regionserver.logroll.errors.tolerated", 2);
 
     // rollWriter sets this.hdfs_out if it can.
     rollWriter();

hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSHDFSUtils.java

@@ -201,11 +201,11 @@ public class FSHDFSUtils extends FSUtils {
     // This setting should be a little bit above what the cluster dfs heartbeat is set to.
     long firstPause = conf.getInt("hbase.lease.recovery.first.pause", 4000);
     // This should be set to how long it'll take for us to timeout against primary datanode if it
-    // is dead.  We set it to 61 seconds, 1 second than the default READ_TIMEOUT in HDFS, the
+    // is dead.  We set it to 64 seconds, 4 second than the default READ_TIMEOUT in HDFS, the
     // default value for DFS_CLIENT_SOCKET_TIMEOUT_KEY. If recovery is still failing after this
     // timeout, then further recovery will take liner backoff with this base, to avoid endless
     // preemptions when this value is not properly configured.
-    long subsequentPauseBase = conf.getLong("hbase.lease.recovery.dfs.timeout", 61 * 1000);
+    long subsequentPauseBase = conf.getLong("hbase.lease.recovery.dfs.timeout", 64 * 1000);
 
     Method isFileClosedMeth = null;
     // whether we need to look for isFileClosed method

src/main/asciidoc/_chapters/hbase-default.adoc

@@ -461,11 +461,12 @@ The host name or IP address of the name server (DNS)
 
       A split policy determines when a region should be split. The various other split policies that
       are available currently are ConstantSizeRegionSplitPolicy, DisabledRegionSplitPolicy,
-      DelimitedKeyPrefixRegionSplitPolicy, KeyPrefixRegionSplitPolicy etc.
+      DelimitedKeyPrefixRegionSplitPolicy, KeyPrefixRegionSplitPolicy,
+      BusyRegionSplitPolicy, SteppingSplitPolicy etc.
 
 +
 .Default
-`org.apache.hadoop.hbase.regionserver.IncreasingToUpperBoundRegionSplitPolicy`
+`org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy`
 
 
 [[zookeeper.session.timeout]]
@@ -2111,7 +2112,7 @@ Fully qualified name of class implementing coordinated state manager.
 
 +
 .Default
-`10`
+`16`
 
 
 [[hbase.replication.rpc.codec]]