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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.exec.rpc.data;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.DrillBuf;
import io.netty.channel.ChannelFuture;
import io.netty.channel.socket.SocketChannel;
import io.netty.util.concurrent.GenericFutureListener;
import java.io.IOException;
import java.util.concurrent.ThreadLocalRandom;
import org.apache.drill.exec.exception.FragmentSetupException;
import org.apache.drill.exec.memory.BufferAllocator;
import org.apache.drill.exec.proto.BitData.BitClientHandshake;
import org.apache.drill.exec.proto.BitData.BitServerHandshake;
import org.apache.drill.exec.proto.BitData.FragmentRecordBatch;
import org.apache.drill.exec.proto.BitData.RpcType;
import org.apache.drill.exec.proto.ExecProtos.FragmentHandle;
import org.apache.drill.exec.proto.UserBitShared.RpcChannel;
import org.apache.drill.exec.proto.helper.QueryIdHelper;
import org.apache.drill.exec.rpc.Acks;
import org.apache.drill.exec.rpc.BasicServer;
import org.apache.drill.exec.rpc.OutOfMemoryHandler;
import org.apache.drill.exec.rpc.ProtobufLengthDecoder;
import org.apache.drill.exec.rpc.Response;
import org.apache.drill.exec.rpc.ResponseSender;
import org.apache.drill.exec.rpc.RpcException;
import org.apache.drill.exec.rpc.control.WorkEventBus;
import org.apache.drill.exec.server.BootStrapContext;
import org.apache.drill.exec.work.WorkManager.WorkerBee;
import org.apache.drill.exec.work.fragment.FragmentManager;
import com.google.protobuf.MessageLite;
public class DataServer extends BasicServer<RpcType, BitServerConnection> {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DataServer.class);
private volatile ProxyCloseHandler proxyCloseHandler;
private final BootStrapContext context;
private final WorkEventBus workBus;
private final WorkerBee bee;
public DataServer(BootStrapContext context, BufferAllocator alloc, WorkEventBus workBus,
WorkerBee bee) {
super(
DataRpcConfig.getMapping(context.getConfig(), context.getExecutor()),
alloc.getAsByteBufAllocator(),
context.getBitLoopGroup());
this.context = context;
this.workBus = workBus;
this.bee = bee;
}
@Override
public MessageLite getResponseDefaultInstance(int rpcType) throws RpcException {
return DataDefaultInstanceHandler.getResponseDefaultInstanceServer(rpcType);
}
@Override
protected GenericFutureListener<ChannelFuture> getCloseHandler(SocketChannel ch, BitServerConnection connection) {
this.proxyCloseHandler = new ProxyCloseHandler(super.getCloseHandler(ch, connection));
return proxyCloseHandler;
}
@Override
public BitServerConnection initRemoteConnection(SocketChannel channel) {
super.initRemoteConnection(channel);
return new BitServerConnection(channel, context.getAllocator());
}
@Override
protected ServerHandshakeHandler<BitClientHandshake> getHandshakeHandler(final BitServerConnection connection) {
return new ServerHandshakeHandler<BitClientHandshake>(RpcType.HANDSHAKE, BitClientHandshake.PARSER) {
@Override
public MessageLite getHandshakeResponse(BitClientHandshake inbound) throws Exception {
// logger.debug("Handling handshake from other bit. {}", inbound);
if (inbound.getRpcVersion() != DataRpcConfig.RPC_VERSION) {
throw new RpcException(String.format("Invalid rpc version. Expected %d, actual %d.",
inbound.getRpcVersion(), DataRpcConfig.RPC_VERSION));
}
if (inbound.getChannel() != RpcChannel.BIT_DATA) {
throw new RpcException(String.format("Invalid NodeMode. Expected BIT_DATA but received %s.",
inbound.getChannel()));
}
return BitServerHandshake.newBuilder().setRpcVersion(DataRpcConfig.RPC_VERSION).build();
}
};
}
private static FragmentHandle getHandle(FragmentRecordBatch batch, int index) {
return FragmentHandle.newBuilder()
.setQueryId(batch.getQueryId())
.setMajorFragmentId(batch.getReceivingMajorFragmentId())
.setMinorFragmentId(batch.getReceivingMinorFragmentId(index))
.build();
}
private void submit(IncomingDataBatch batch, int minorStart, int minorStopExclusive) throws FragmentSetupException,
IOException {
for (int minor = minorStart; minor < minorStopExclusive; minor++) {
final FragmentManager manager = workBus.getFragmentManager(getHandle(batch.getHeader(), minor));
if (manager == null) {
// A missing manager means the query already terminated. We can simply drop this data.
continue;
}
final boolean canRun = manager.handle(batch);
if (canRun) {
// logger.debug("Arriving batch means local batch can run, starting local batch.");
/*
* If we've reached the canRun threshold, we'll proceed. This expects manager.handle() to only return a single
* true. This is guaranteed by the interface.
*/
bee.startFragmentPendingRemote(manager);
}
}
}
@Override
protected void handle(BitServerConnection connection, int rpcType, ByteBuf pBody, ByteBuf body, ResponseSender sender) throws RpcException {
assert rpcType == RpcType.REQ_RECORD_BATCH_VALUE;
final FragmentRecordBatch fragmentBatch = get(pBody, FragmentRecordBatch.PARSER);
final AckSender ack = new AckSender(sender);
// increment so we don't get false returns.
ack.increment();
try {
final IncomingDataBatch batch = new IncomingDataBatch(fragmentBatch, (DrillBuf) body, ack);
final int targetCount = fragmentBatch.getReceivingMinorFragmentIdCount();
// randomize who gets first transfer (and thus ownership) so memory usage is balanced when we're sharing amongst
// multiple fragments.
final int firstOwner = ThreadLocalRandom.current().nextInt(targetCount);
submit(batch, firstOwner, targetCount);
submit(batch, 0, firstOwner);
} catch (IOException | FragmentSetupException e) {
logger.error("Failure while getting fragment manager. {}",
QueryIdHelper.getQueryIdentifiers(fragmentBatch.getQueryId(),
fragmentBatch.getReceivingMajorFragmentId(),
fragmentBatch.getReceivingMinorFragmentIdList()), e);
ack.clear();
sender.send(new Response(RpcType.ACK, Acks.FAIL));
} finally {
// decrement the extra reference we grabbed at the top.
ack.sendOk();
}
}
private class ProxyCloseHandler implements GenericFutureListener<ChannelFuture> {
private volatile GenericFutureListener<ChannelFuture> handler;
public ProxyCloseHandler(GenericFutureListener<ChannelFuture> handler) {
super();
this.handler = handler;
}
@Override
public void operationComplete(ChannelFuture future) throws Exception {
handler.operationComplete(future);
}
}
@Override
public OutOfMemoryHandler getOutOfMemoryHandler() {
return new OutOfMemoryHandler() {
@Override
public void handle() {
logger.error("Out of memory in RPC layer.");
}
};
}
@Override
public ProtobufLengthDecoder getDecoder(BufferAllocator allocator, OutOfMemoryHandler outOfMemoryHandler) {
return new DataProtobufLengthDecoder.Server(allocator, outOfMemoryHandler);
}
}
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