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Fix race condition between Network.start() and Controller calling Network.prunePeers()

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Modified synchronized Lists to be final.
Moved some initializers out of constructor.
This commit is contained in:
catbref 2020-08-13 13:45:06 +01:00
parent f61e320230
commit 2165c87b9d
1 changed files with 14 additions and 30 deletions
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44
src/main/java/org/qortal/network/Network.java
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@ -50,7 +50,6 @@ import org.qortal.repository.DataException;
import org.qortal.repository.Repository;
import org.qortal.repository.RepositoryManager;
import org.qortal.settings.Settings;
import org.qortal.transform.Transformer;
import org.qortal.utils.ExecuteProduceConsume;
// import org.qortal.utils.ExecutorDumper;
import org.qortal.utils.ExecuteProduceConsume.StatsSnapshot;
@ -91,15 +90,16 @@ public class Network {
public static final int MAX_SIGNATURES_PER_REPLY = 500;
public static final int MAX_BLOCK_SUMMARIES_PER_REPLY = 500;
private final Ed25519PrivateKeyParameters edPrivateKeyParams;
private final Ed25519PublicKeyParameters edPublicKeyParams;
private final String ourNodeId;
// Generate our node keys / ID
private final Ed25519PrivateKeyParameters edPrivateKeyParams = new Ed25519PrivateKeyParameters(new SecureRandom());
private final Ed25519PublicKeyParameters edPublicKeyParams = edPrivateKeyParams.generatePublicKey();
private final String ourNodeId = Crypto.toNodeAddress(edPublicKeyParams.getEncoded());
private final int maxMessageSize;
private List<PeerData> allKnownPeers;
private List<Peer> connectedPeers;
private List<PeerAddress> selfPeers;
private final List<PeerData> allKnownPeers = new ArrayList<>();
private final List<Peer> connectedPeers = new ArrayList<>();
private final List<PeerAddress> selfPeers = new ArrayList<>();
private ExecuteProduceConsume networkEPC;
private Selector channelSelector;
@ -108,39 +108,21 @@ public class Network {
private int minOutboundPeers;
private int maxPeers;
private long nextConnectTaskTimestamp;
private long nextConnectTaskTimestamp = 0L; // ms - try first connect once NTP syncs
private ExecutorService broadcastExecutor;
private long nextBroadcastTimestamp;
private ExecutorService broadcastExecutor = Executors.newCachedThreadPool();
private long nextBroadcastTimestamp = 0L; // ms - try first broadcast once NTP syncs
private Lock mergePeersLock;
private final Lock mergePeersLock = new ReentrantLock();
// Constructors
private Network() {
connectedPeers = new ArrayList<>();
selfPeers = new ArrayList<>();
// Generate our ID
byte[] seed = new byte[Transformer.PRIVATE_KEY_LENGTH];
new SecureRandom().nextBytes(seed);
edPrivateKeyParams = new Ed25519PrivateKeyParameters(seed, 0);
edPublicKeyParams = edPrivateKeyParams.generatePublicKey();
ourNodeId = Crypto.toNodeAddress(edPublicKeyParams.getEncoded());
maxMessageSize = 4 + 1 + 4 + BlockChain.getInstance().getMaxBlockSize();
minOutboundPeers = Settings.getInstance().getMinOutboundPeers();
maxPeers = Settings.getInstance().getMaxPeers();
nextConnectTaskTimestamp = 0; // First connect once NTP syncs
broadcastExecutor = Executors.newCachedThreadPool();
nextBroadcastTimestamp = 0; // First broadcast once NTP syncs
mergePeersLock = new ReentrantLock();
// We'll use a cached thread pool but with more aggressive timeout.
ExecutorService networkExecutor = new ThreadPoolExecutor(1,
Settings.getInstance().getMaxNetworkThreadPoolSize(),
@ -177,7 +159,9 @@ public class Network {
// Load all known peers from repository
try (final Repository repository = RepositoryManager.getRepository()) {
allKnownPeers = repository.getNetworkRepository().getAllPeers();
synchronized (this.allKnownPeers) {
this.allKnownPeers.addAll(repository.getNetworkRepository().getAllPeers());
}
}
// Start up first networking thread