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HBASE-20049 Region replicas of SPLIT and MERGED regions are kept in in-memory states until restarting master 

Signed-off-by: tedyu <yuzhihong@gmail.com>
This commit is contained in:
Toshihiro Suzuki 2018-02-22 17:45:51 +09:00 committed by tedyu
parent 51f7b75f1f
commit 1bc996aa50
5 changed files with 49 additions and 9 deletions
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1
hbase-protocol-shaded/src/main/protobuf/MasterProcedure.proto
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@ -331,6 +331,7 @@ message UnassignRegionStateData {
// server we will send the unassign rpc too.
optional ServerName hosting_server = 5;
optional bool force = 4 [default = false];
optional bool remove_after_unassigning = 6 [default = false];
}
enum MoveRegionState {

8
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
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@ -733,11 +733,17 @@ public class AssignmentManager implements ServerListener {
UnassignProcedure createUnassignProcedure(final RegionInfo regionInfo,
final ServerName destinationServer, final boolean force) {
return createUnassignProcedure(regionInfo, destinationServer, force, false);
}
UnassignProcedure createUnassignProcedure(final RegionInfo regionInfo,
final ServerName destinationServer, final boolean force,
final boolean removeAfterUnassigning) {
// If destinationServer is null, figure it.
ServerName sn = destinationServer != null? destinationServer:
getRegionStates().getRegionState(regionInfo).getServerName();
assert sn != null;
UnassignProcedure proc = new UnassignProcedure(regionInfo, sn, force);
UnassignProcedure proc = new UnassignProcedure(regionInfo, sn, force, removeAfterUnassigning);
proc.setOwner(getProcedureEnvironment().getRequestUser().getShortName());
return proc;
}

3
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java
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@ -682,7 +682,8 @@ public class MergeTableRegionsProcedure
for (int i = 0; i < regionsToMerge.length; ++i) {
for (int j = 0; j < regionReplication; ++j) {
final RegionInfo hri = RegionReplicaUtil.getRegionInfoForReplica(regionsToMerge[i], j);
procs[procsIdx++] = env.getAssignmentManager().createUnassignProcedure(hri,null,true);
procs[procsIdx++] = env.getAssignmentManager().
createUnassignProcedure(hri, null, true, !RegionReplicaUtil.isDefaultReplica(hri));
}
}
return procs;

3
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java
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@ -793,7 +793,8 @@ public class SplitTableRegionProcedure
final UnassignProcedure[] procs = new UnassignProcedure[regionReplication];
for (int i = 0; i < procs.length; ++i) {
final RegionInfo hri = RegionReplicaUtil.getRegionInfoForReplica(getParentRegion(), i);
procs[i] = env.getAssignmentManager().createUnassignProcedure(hri, null, true);
procs[i] = env.getAssignmentManager().
createUnassignProcedure(hri, null, true, !RegionReplicaUtil.isDefaultReplica(hri));
}
return procs;
}

37
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/UnassignProcedure.java
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@ -26,6 +26,7 @@ import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.exceptions.UnexpectedStateException;
import org.apache.hadoop.hbase.favored.FavoredNodesManager;
import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
import org.apache.hadoop.hbase.master.RegionState.State;
import org.apache.hadoop.hbase.master.assignment.RegionStates.RegionStateNode;
@ -40,6 +41,7 @@ import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RegionTransitionState;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.UnassignRegionStateData;
@ -86,22 +88,34 @@ public class UnassignProcedure extends RegionTransitionProcedure {
// ...and keep unassign for 'disable' case?
private boolean force;
/**
* Whether deleting the region from in-memory states after unassigning the region.
*/
private boolean removeAfterUnassigning;
public UnassignProcedure() {
// Required by the Procedure framework to create the procedure on replay
super();
}
public UnassignProcedure(final RegionInfo regionInfo, final ServerName hostingServer,
final boolean force) {
this(regionInfo, hostingServer, null, force);
final boolean force, final boolean removeAfterUnassigning) {
this(regionInfo, hostingServer, null, force, removeAfterUnassigning);
}
public UnassignProcedure(final RegionInfo regionInfo,
final ServerName hostingServer, final ServerName destinationServer, final boolean force) {
this(regionInfo, hostingServer, destinationServer, force, false);
}
public UnassignProcedure(final RegionInfo regionInfo, final ServerName hostingServer,
final ServerName destinationServer, final boolean force,
final boolean removeAfterUnassigning) {
super(regionInfo);
this.hostingServer = hostingServer;
this.destinationServer = destinationServer;
this.force = force;
this.removeAfterUnassigning = removeAfterUnassigning;
// we don't need REGION_TRANSITION_QUEUE, we jump directly to sending the request
setTransitionState(RegionTransitionState.REGION_TRANSITION_DISPATCH);
@ -136,6 +150,9 @@ public class UnassignProcedure extends RegionTransitionProcedure {
if (force) {
state.setForce(true);
}
if (removeAfterUnassigning) {
state.setRemoveAfterUnassigning(true);
}
serializer.serialize(state.build());
}
@ -151,6 +168,7 @@ public class UnassignProcedure extends RegionTransitionProcedure {
if (state.hasDestinationServer()) {
this.destinationServer = ProtobufUtil.toServerName(state.getDestinationServer());
}
removeAfterUnassigning = state.getRemoveAfterUnassigning();
}
@Override
@ -190,7 +208,20 @@ public class UnassignProcedure extends RegionTransitionProcedure {
@Override
protected void finishTransition(final MasterProcedureEnv env, final RegionStateNode regionNode)
throws IOException {
env.getAssignmentManager().markRegionAsClosed(regionNode);
AssignmentManager am = env.getAssignmentManager();
RegionInfo regionInfo = getRegionInfo();
if (!removeAfterUnassigning) {
am.markRegionAsClosed(regionNode);
} else {
// Remove from in-memory states
am.getRegionStates().deleteRegion(regionInfo);
env.getMasterServices().getServerManager().removeRegion(regionInfo);
FavoredNodesManager fnm = env.getMasterServices().getFavoredNodesManager();
if (fnm != null) {
fnm.deleteFavoredNodesForRegions(Lists.newArrayList(regionInfo));
}
}
}
@Override