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Posted to commits@dubbo.apache.org by al...@apache.org on 2021/11/08 09:24:10 UTC
[dubbo] branch 3.0 updated: [3.0] allocate invokers space at
initial time of AbstractDirectory, fix ConnectivityValidationTest (#9211)
This is an automated email from the ASF dual-hosted git repository.
albumenj pushed a commit to branch 3.0
in repository https://gitbox.apache.org/repos/asf/dubbo.git
The following commit(s) were added to refs/heads/3.0 by this push:
new 8a14fb3 [3.0] allocate invokers space at initial time of AbstractDirectory, fix ConnectivityValidationTest (#9211)
8a14fb3 is described below
commit 8a14fb39304308c0b742dbc3fad60cdcc6595f6a
Author: zrlw <zr...@sina.com>
AuthorDate: Mon Nov 8 17:23:37 2021 +0800
[3.0] allocate invokers space at initial time of AbstractDirectory, fix ConnectivityValidationTest (#9211)
* allocate space for invokers and validInvokers to avoid NPE
* extract operations of invokers and validInvokers
* remove useless import
* reset validInvokersInitialized at destroy()
* add invokersInitialized for refreshInvoker
* optimize codes
* use local reference to avoid NPE
* optimize codes
* set empty instead of clearing at destroyInvokers()
* remove useless lock
* add lock for validInvoker
* return unmodifiableList for getInvokers and getValidInvokers
* return clone object to avoid being modified
* fix ut
* optimize code
* refresh validInvokers at setInvokers
* wait new task finished at checkConnectivity()
* retrieve checkConnectivity and fix ConnectivityValidationTest
* retrieve checkConnectivity
* optimize setInvokers()
---
.../rpc/cluster/directory/AbstractDirectory.java | 141 +++++++++++----------
.../rpc/cluster/directory/StaticDirectory.java | 18 ++-
.../rpc/cluster/directory/StaticDirectoryTest.java | 4 +-
.../support/ConnectivityValidationTest.java | 61 ++++++---
.../file/FileSystemDynamicConfigurationTest.java | 5 +-
.../dubbo/config/bootstrap/MultiInstanceTest.java | 17 ++-
.../client/ServiceDiscoveryRegistryDirectory.java | 23 ++--
.../registry/integration/DynamicDirectory.java | 9 +-
.../registry/integration/RegistryDirectory.java | 42 +++---
9 files changed, 184 insertions(+), 136 deletions(-)
diff --git a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/AbstractDirectory.java b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/AbstractDirectory.java
index 2ec0ecc..cbce9e4 100644
--- a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/AbstractDirectory.java
+++ b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/AbstractDirectory.java
@@ -51,8 +51,6 @@ import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.Semaphore;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantLock;
import static org.apache.dubbo.common.constants.CommonConstants.DUBBO;
import static org.apache.dubbo.common.constants.CommonConstants.INTERFACE_KEY;
@@ -80,17 +78,20 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
protected final Map<String, String> queryMap;
- protected final Lock invokerLock = new ReentrantLock();
+ /**
+ * Invokers initialized flag.
+ */
+ private volatile boolean invokersInitialized = false;
/**
* All invokers from registry
*/
- protected volatile BitList<Invoker<T>> invokers;
+ private volatile BitList<Invoker<T>> invokers = BitList.emptyList();
/**
* Valid Invoker. All invokers from registry exclude unavailable and disabled invokers.
*/
- protected volatile BitList<Invoker<T>> validInvokers;
+ private volatile BitList<Invoker<T>> validInvokers = BitList.emptyList();
/**
* Waiting to reconnect invokers.
@@ -177,18 +178,19 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
}
BitList<Invoker<T>> availableInvokers;
- if (validInvokers != null) {
- availableInvokers = validInvokers;
+ // use clone to avoid being modified at doList().
+ if (invokersInitialized) {
+ availableInvokers = validInvokers.clone();
} else {
- availableInvokers = invokers;
+ availableInvokers = invokers.clone();
}
List<Invoker<T>> routedResult = doList(availableInvokers, invocation);
if (routedResult.isEmpty()) {
logger.warn("No provider available after connectivity filter for the service " + getConsumerUrl().getServiceKey()
- + " all validInvokers' size: " + (validInvokers == null ? 0 : validInvokers.size())
+ + " all validInvokers' size: " + validInvokers.size()
+ "/ all routed invokers' size: " + routedResult.size()
- + "/ all invokers' size: " + (invokers == null ? 0 : invokers.size())
+ + "/ all invokers' size: " + invokers.size()
+ " from registry " + getUrl().getAddress()
+ " on the consumer " + NetUtils.getLocalHost()
+ " using the dubbo version " + Version.getVersion() + ".");
@@ -230,12 +232,7 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
@Override
public void destroy() {
destroyed = true;
- if (invokers != null) {
- invokers.clear();
- }
- if (validInvokers != null) {
- validInvokers.clear();
- }
+ destroyInvokers();
invokersToReconnect.clear();
disabledInvokers.clear();
}
@@ -247,17 +244,12 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
@Override
public void addInvalidateInvoker(Invoker<T> invoker) {
- invokerLock.lock();
- try {
- // 1. remove this invoker from validInvokers list, this invoker will not be listed in the next time
- if (validInvokers.remove(invoker)) {
- // 2. add this invoker to reconnect list
- invokersToReconnect.add(invoker);
- // 3. try start check connectivity task
- checkConnectivity();
- }
- } finally {
- invokerLock.unlock();
+ // 1. remove this invoker from validInvokers list, this invoker will not be listed in the next time
+ if (removeValidInvoker(invoker)) {
+ // 2. add this invoker to reconnect list
+ invokersToReconnect.add(invoker);
+ // 3. try start check connectivity task
+ checkConnectivity();
}
}
@@ -299,17 +291,12 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
}
// 3. recover valid invoker
- invokerLock.lock();
- try {
- for (Invoker<T> tInvoker : needDeleteList) {
- if (invokers.contains(tInvoker)) {
- validInvokers.add(tInvoker);
- logger.info("Recover service address: " + tInvoker.getUrl() + " from invalid list.");
- }
- invokersToReconnect.remove(tInvoker);
+ for (Invoker<T> tInvoker : needDeleteList) {
+ if (invokers.contains(tInvoker)) {
+ addValidInvoker(tInvoker);
+ logger.info("Recover service address: " + tInvoker.getUrl() + " from invalid list.");
}
- } finally {
- invokerLock.unlock();
+ invokersToReconnect.remove(tInvoker);
}
} finally {
checkConnectivityPermit.release();
@@ -330,20 +317,19 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
* 3. all the invokers disappeared from total invokers should be removed in the need to reconnect list
* 4. all the invokers disappeared from total invokers should be removed in the disabled invokers list
*/
- public synchronized void refreshInvoker() {
- invokerLock.lock();
- try {
- if (invokers != null) {
- BitList<Invoker<T>> copiedInvokers = invokers.clone();
- refreshInvokers(copiedInvokers, invokersToReconnect);
- refreshInvokers(copiedInvokers, disabledInvokers);
- validInvokers = copiedInvokers;
- }
- } finally {
- invokerLock.unlock();
+ public void refreshInvoker() {
+ if (invokersInitialized) {
+ refreshInvokerInternal();
}
}
+ private synchronized void refreshInvokerInternal() {
+ BitList<Invoker<T>> copiedInvokers = invokers.clone();
+ refreshInvokers(copiedInvokers, invokersToReconnect);
+ refreshInvokers(copiedInvokers, disabledInvokers);
+ validInvokers = copiedInvokers;
+ }
+
private void refreshInvokers(BitList<Invoker<T>> targetInvokers, Collection<Invoker<T>> invokersToRemove) {
List<Invoker<T>> needToRemove = new LinkedList<>();
for (Invoker<T> tInvoker : invokersToRemove) {
@@ -358,32 +344,22 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
@Override
public void addDisabledInvoker(Invoker<T> invoker) {
- invokerLock.lock();
- try {
- if (invokers.contains(invoker)) {
- disabledInvokers.add(invoker);
- validInvokers.remove(invoker);
- logger.info("Disable service address: " + invoker.getUrl() + ".");
- }
- } finally {
- invokerLock.unlock();
+ if (invokers.contains(invoker)) {
+ disabledInvokers.add(invoker);
+ removeValidInvoker(invoker);
+ logger.info("Disable service address: " + invoker.getUrl() + ".");
}
}
@Override
public void recoverDisabledInvoker(Invoker<T> invoker) {
- invokerLock.lock();
- try {
- if (disabledInvokers.remove(invoker)) {
- try {
- validInvokers.add(invoker);
- logger.info("Recover service address: " + invoker.getUrl() + " from disabled list.");
- } catch (Throwable ignore) {
+ if (disabledInvokers.remove(invoker)) {
+ try {
+ addValidInvoker(invoker);
+ logger.info("Recover service address: " + invoker.getUrl() + " from disabled list.");
+ } catch (Throwable ignore) {
- }
}
- } finally {
- invokerLock.unlock();
}
}
@@ -404,11 +380,13 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
}
public BitList<Invoker<T>> getInvokers() {
- return invokers;
+ // return clone to avoid being modified.
+ return invokers.clone();
}
public BitList<Invoker<T>> getValidInvokers() {
- return validInvokers;
+ // return clone to avoid being modified.
+ return validInvokers.clone();
}
public List<Invoker<T>> getInvokersToReconnect() {
@@ -419,6 +397,31 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
return disabledInvokers;
}
+ protected void setInvokers(BitList<Invoker<T>> invokers) {
+ this.invokers = invokers;
+ refreshInvokerInternal();
+ this.invokersInitialized = true;
+ }
+
+ protected void destroyInvokers() {
+ // set empty instead of clearing to support concurrent access.
+ this.invokers = BitList.emptyList();
+ this.validInvokers = BitList.emptyList();
+ this.invokersInitialized = false;
+ }
+
+ private boolean addValidInvoker(Invoker<T> invoker) {
+ synchronized (this.validInvokers) {
+ return this.validInvokers.add(invoker);
+ }
+ }
+
+ private boolean removeValidInvoker(Invoker<T> invoker) {
+ synchronized (this.validInvokers) {
+ return this.validInvokers.remove(invoker);
+ }
+ }
+
protected abstract List<Invoker<T>> doList(BitList<Invoker<T>> invokers, Invocation invocation) throws RpcException;
}
diff --git a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectory.java b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectory.java
index e11f4e0..ed6eb2d 100644
--- a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectory.java
+++ b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectory.java
@@ -51,18 +51,17 @@ public class StaticDirectory<T> extends AbstractDirectory<T> {
if (CollectionUtils.isEmpty(invokers)) {
throw new IllegalArgumentException("invokers == null");
}
- this.invokers = new BitList<>(invokers);
- this.validInvokers = this.invokers.clone();
+ this.setInvokers(new BitList<>(invokers));
}
@Override
public Class<T> getInterface() {
- return invokers.get(0).getInterface();
+ return getInvokers().get(0).getInterface();
}
@Override
public List<Invoker<T>> getAllInvokers() {
- return invokers;
+ return getInvokers();
}
@Override
@@ -70,7 +69,7 @@ public class StaticDirectory<T> extends AbstractDirectory<T> {
if (isDestroyed()) {
return false;
}
- for (Invoker<T> invoker : validInvokers) {
+ for (Invoker<T> invoker : getValidInvokers()) {
if (invoker.isAvailable()) {
return true;
}
@@ -83,7 +82,7 @@ public class StaticDirectory<T> extends AbstractDirectory<T> {
if (isDestroyed()) {
return;
}
- for (Invoker<T> invoker : invokers) {
+ for (Invoker<T> invoker : getInvokers()) {
invoker.destroy();
}
super.destroy();
@@ -91,16 +90,15 @@ public class StaticDirectory<T> extends AbstractDirectory<T> {
public void buildRouterChain() {
RouterChain<T> routerChain = RouterChain.buildChain(getUrl());
- routerChain.setInvokers(invokers);
+ routerChain.setInvokers(getInvokers());
routerChain.loop(true);
this.setRouterChain(routerChain);
}
public void notify(List<Invoker<T>> invokers) {
- this.invokers = new BitList<>(invokers);
- refreshInvoker();
+ this.setInvokers(new BitList<>(invokers));
if (routerChain != null) {
- routerChain.setInvokers(this.invokers);
+ routerChain.setInvokers(this.getInvokers());
}
}
diff --git a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectoryTest.java b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectoryTest.java
index c9fe0c7..69022af 100644
--- a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectoryTest.java
+++ b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/StaticDirectoryTest.java
@@ -61,7 +61,7 @@ public class StaticDirectoryTest {
List<Invoker<String>> newInvokers = staticDirectory.list(new MockDirInvocation());
Assertions.assertTrue(newInvokers.size() > 0);
staticDirectory.destroy();
- Assertions.assertEquals(0, staticDirectory.invokers.size());
- Assertions.assertEquals(0, staticDirectory.validInvokers.size());
+ Assertions.assertEquals(0, staticDirectory.getInvokers().size());
+ Assertions.assertEquals(0, staticDirectory.getValidInvokers().size());
}
}
diff --git a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/support/ConnectivityValidationTest.java b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/support/ConnectivityValidationTest.java
index 99b1684..94f6579 100644
--- a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/support/ConnectivityValidationTest.java
+++ b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/support/ConnectivityValidationTest.java
@@ -29,6 +29,7 @@ import org.apache.dubbo.rpc.cluster.LoadBalance;
import org.apache.dubbo.rpc.cluster.directory.StaticDirectory;
import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
@@ -36,8 +37,11 @@ import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import java.util.Collections;
+import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadLocalRandom;
@@ -111,6 +115,11 @@ public class ConnectivityValidationTest {
clusterInvoker = new ConnectivityClusterInvoker(directory);
}
+ @AfterEach
+ public void tearDown() {
+ clusterInvoker.destroy();
+ }
+
private void configInvoker(Invoker invoker) {
when(invoker.getUrl()).thenReturn(URL.valueOf(""));
when(invoker.isAvailable()).thenReturn(true);
@@ -145,26 +154,30 @@ public class ConnectivityValidationTest {
Assertions.assertEquals(0, directory.list(invocation).size());
when(invoker1.isAvailable()).thenReturn(true);
- waitRefresh();
+ Set<Invoker> invokerSet = new HashSet<>();
+ invokerSet.add(invoker1);
+ waitRefresh(invokerSet);
Assertions.assertEquals(1, directory.list(invocation).size());
Assertions.assertNotNull(clusterInvoker.select(loadBalance, invocation, directory.list(invocation), Collections.emptyList()));
when(invoker2.isAvailable()).thenReturn(true);
- waitRefresh();
+ invokerSet.add(invoker2);
+ waitRefresh(invokerSet);
Assertions.assertEquals(2, directory.list(invocation).size());
Assertions.assertNotNull(clusterInvoker.select(loadBalance, invocation, directory.list(invocation), Collections.emptyList()));
invokerList.remove(invoker5);
directory.notify(invokerList);
when(invoker2.isAvailable()).thenReturn(true);
- waitRefresh();
+ waitRefresh(invokerSet);
Assertions.assertEquals(2, directory.list(invocation).size());
Assertions.assertNotNull(clusterInvoker.select(loadBalance, invocation, directory.list(invocation), Collections.emptyList()));
when(invoker3.isAvailable()).thenReturn(true);
when(invoker4.isAvailable()).thenReturn(true);
-
- waitRefresh();
+ invokerSet.add(invoker3);
+ invokerSet.add(invoker4);
+ waitRefresh(invokerSet);
Assertions.assertEquals(4, directory.list(invocation).size());
Assertions.assertNotNull(clusterInvoker.select(loadBalance, invocation, directory.list(invocation), Collections.emptyList()));
}
@@ -186,7 +199,9 @@ public class ConnectivityValidationTest {
Assertions.assertEquals(1, directory.list(invocation).size());
when(invoker1.isAvailable()).thenReturn(true);
- waitRefresh();
+ Set<Invoker> invokerSet = new HashSet<>();
+ invokerSet.add(invoker1);
+ waitRefresh(invokerSet);
Assertions.assertEquals(2, directory.list(invocation).size());
}
@@ -251,7 +266,23 @@ public class ConnectivityValidationTest {
when(invoker14.isAvailable()).thenReturn(true);
when(invoker15.isAvailable()).thenReturn(true);
- waitRefresh();
+ Set<Invoker> invokerSet = new HashSet<>();
+ invokerSet.add(invoker1);
+ invokerSet.add(invoker2);
+ invokerSet.add(invoker3);
+ invokerSet.add(invoker4);
+ invokerSet.add(invoker5);
+ invokerSet.add(invoker6);
+ invokerSet.add(invoker7);
+ invokerSet.add(invoker8);
+ invokerSet.add(invoker9);
+ invokerSet.add(invoker10);
+ invokerSet.add(invoker11);
+ invokerSet.add(invoker12);
+ invokerSet.add(invoker13);
+ invokerSet.add(invoker14);
+ invokerSet.add(invoker15);
+ waitRefresh(invokerSet);
Assertions.assertTrue(directory.list(invocation).size() > 1);
}
@@ -271,15 +302,15 @@ public class ConnectivityValidationTest {
}
}
- private void waitRefresh() throws InterruptedException {
- ScheduledFuture future = directory.getConnectivityCheckFuture();
- while (!future.isDone()) {
- Thread.sleep(10);
- }
+ private void waitRefresh(Set<Invoker> invokerSet) throws InterruptedException {
directory.checkConnectivity();
- future = directory.getConnectivityCheckFuture();
- while (!future.isDone()) {
- Thread.sleep(10);
+ while (true) {
+ List<Invoker> reconnectList = directory.getInvokersToReconnect();
+ if (reconnectList.stream().anyMatch(invoker -> invokerSet.contains(invoker))) {
+ Thread.sleep(10);
+ continue;
+ }
+ break;
}
}
diff --git a/dubbo-common/src/test/java/org/apache/dubbo/common/config/configcenter/file/FileSystemDynamicConfigurationTest.java b/dubbo-common/src/test/java/org/apache/dubbo/common/config/configcenter/file/FileSystemDynamicConfigurationTest.java
index 97f55d2..4d3caea 100644
--- a/dubbo-common/src/test/java/org/apache/dubbo/common/config/configcenter/file/FileSystemDynamicConfigurationTest.java
+++ b/dubbo-common/src/test/java/org/apache/dubbo/common/config/configcenter/file/FileSystemDynamicConfigurationTest.java
@@ -22,8 +22,8 @@ import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.condition.DisabledIfEnvironmentVariable;
import java.io.File;
import java.io.IOException;
@@ -44,7 +44,8 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
* {@link FileSystemDynamicConfiguration} Test
*/
// Test often failed on Github Actions Platform because of file system on Azure
-@DisabledIfEnvironmentVariable(named = "DISABLE_FILE_SYSTEM_TEST", matches = "true")
+// Change to Disabled because DisabledIfEnvironmentVariable does not work on Github.
+@Disabled
public class FileSystemDynamicConfigurationTest {
private final Logger logger = LoggerFactory.getLogger(getClass());
diff --git a/dubbo-config/dubbo-config-api/src/test/java/org/apache/dubbo/config/bootstrap/MultiInstanceTest.java b/dubbo-config/dubbo-config-api/src/test/java/org/apache/dubbo/config/bootstrap/MultiInstanceTest.java
index 4aacacd..b4f4698 100644
--- a/dubbo-config/dubbo-config-api/src/test/java/org/apache/dubbo/config/bootstrap/MultiInstanceTest.java
+++ b/dubbo-config/dubbo-config-api/src/test/java/org/apache/dubbo/config/bootstrap/MultiInstanceTest.java
@@ -34,6 +34,8 @@ import org.apache.dubbo.config.api.DemoService;
import org.apache.dubbo.config.api.Greeting;
import org.apache.dubbo.config.mock.GreetingLocal2;
import org.apache.dubbo.config.provider.impl.DemoServiceImpl;
+import org.apache.dubbo.registry.client.migration.MigrationInvoker;
+import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.model.ApplicationModel;
import org.apache.dubbo.rpc.model.FrameworkModel;
import org.apache.dubbo.rpc.model.FrameworkServiceRepository;
@@ -801,7 +803,8 @@ public class MultiInstanceTest {
.service(serviceConfig)
.asyncStart();
logger.warn("provider app has start async");
- Assertions.assertFalse(serviceConfig.getScopeModel().getDeployer().isStarted(), "Async export seems something wrong");
+ // it might be started if running on fast machine.
+ // Assertions.assertFalse(serviceConfig.getScopeModel().getDeployer().isStarted(), "Async export seems something wrong");
// consumer app
Future consumerFuture = consumerBootstrap
@@ -810,7 +813,8 @@ public class MultiInstanceTest {
.reference(referenceConfig)
.asyncStart();
logger.warn("consumer app has start async");
- Assertions.assertFalse(referenceConfig.getScopeModel().getDeployer().isStarted(), "Async refer seems something wrong");
+ // it might be started if running on fast machine.
+ // Assertions.assertFalse(referenceConfig.getScopeModel().getDeployer().isStarted(), "Async refer seems something wrong");
// wait for provider app startup
providerFuture.get();
@@ -824,6 +828,15 @@ public class MultiInstanceTest {
logger.warn("consumer app is startup");
Object target = referenceConfig.getServiceMetadata().getTarget();
Assertions.assertNotNull(target);
+ // wait for invokers notified from registry
+ MigrationInvoker migrationInvoker = (MigrationInvoker) referenceConfig.getInvoker();
+ for (int i = 0; i < 10; i++) {
+ if (((List<Invoker>) migrationInvoker.getDirectory().getAllInvokers())
+ .stream().anyMatch(invoker -> invoker.getInterface() == Greeting.class)) {
+ break;
+ }
+ Thread.sleep(100);
+ }
Greeting greetingService = (Greeting) target;
String result = greetingService.hello();
Assertions.assertEquals("local", result);
diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/ServiceDiscoveryRegistryDirectory.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/ServiceDiscoveryRegistryDirectory.java
index 29f07bf..2e51f2d 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/ServiceDiscoveryRegistryDirectory.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/ServiceDiscoveryRegistryDirectory.java
@@ -204,9 +204,7 @@ public class ServiceDiscoveryRegistryDirectory<T> extends DynamicDirectory<T> {
if (invokerUrls.size() == 0) {
logger.info("Received empty url list...");
this.forbidden = true; // Forbid to access
- this.invokers = BitList.emptyList();
- this.validInvokers = BitList.emptyList();
- routerChain.setInvokers(this.invokers);
+ routerChain.setInvokers(BitList.emptyList());
destroyAllInvokers(); // Close all invokers
} else {
this.forbidden = false; // Allow accessing
@@ -214,12 +212,14 @@ public class ServiceDiscoveryRegistryDirectory<T> extends DynamicDirectory<T> {
return;
}
- // can't use local reference because this.urlInvokerMap might be accessed at isAvailable() by main thread concurrently.
+ // use local reference to avoid NPE as this.urlInvokerMap will be set null concurrently at destroyAllInvokers().
+ Map<String, Invoker<T>> localUrlInvokerMap = this.urlInvokerMap;
+ // can't use local reference as oldUrlInvokerMap's mappings might be removed directly at toInvokers().
Map<String, Invoker<T>> oldUrlInvokerMap = null;
- if (this.urlInvokerMap != null) {
+ if (localUrlInvokerMap != null) {
// the initial capacity should be set greater than the maximum number of entries divided by the load factor to avoid resizing.
- oldUrlInvokerMap = new LinkedHashMap<>(Math.round(1 + this.urlInvokerMap.size() / DEFAULT_HASHMAP_LOAD_FACTOR));
- this.urlInvokerMap.forEach(oldUrlInvokerMap::put);
+ oldUrlInvokerMap = new LinkedHashMap<>(Math.round(1 + localUrlInvokerMap.size() / DEFAULT_HASHMAP_LOAD_FACTOR));
+ localUrlInvokerMap.forEach(oldUrlInvokerMap::put);
}
Map<String, Invoker<T>> newUrlInvokerMap = toInvokers(oldUrlInvokerMap, invokerUrls);// Translate url list to Invoker map
logger.info("Refreshed invoker size " + newUrlInvokerMap.size());
@@ -229,9 +229,9 @@ public class ServiceDiscoveryRegistryDirectory<T> extends DynamicDirectory<T> {
return;
}
List<Invoker<T>> newInvokers = Collections.unmodifiableList(new ArrayList<>(newUrlInvokerMap.values()));
- this.invokers = multiGroup ? new BitList<>(toMergeInvokerList(newInvokers)) : new BitList<>(newInvokers);
+ this.setInvokers(multiGroup ? new BitList<>(toMergeInvokerList(newInvokers)) : new BitList<>(newInvokers));
// pre-route and build cache
- routerChain.setInvokers(this.invokers);
+ routerChain.setInvokers(this.getInvokers());
this.urlInvokerMap = newUrlInvokerMap;
if (oldUrlInvokerMap != null) {
@@ -251,7 +251,7 @@ public class ServiceDiscoveryRegistryDirectory<T> extends DynamicDirectory<T> {
* Turn urls into invokers, and if url has been refer, will not re-reference.
* the items that will be put into newUrlInvokeMap will be removed from oldUrlInvokerMap.
*
- * @param oldUrlInvokerMap
+ * @param oldUrlInvokerMap it might be modified during the process.
* @param urls
* @return invokers
*/
@@ -350,8 +350,7 @@ public class ServiceDiscoveryRegistryDirectory<T> extends DynamicDirectory<T> {
}
this.urlInvokerMap = null;
- this.invokers = null;
- this.validInvokers = null;
+ this.destroyInvokers();
}
/**
diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/DynamicDirectory.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/DynamicDirectory.java
index 1d887a8..8689cbd 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/DynamicDirectory.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/DynamicDirectory.java
@@ -39,7 +39,6 @@ import org.apache.dubbo.rpc.cluster.RouterFactory;
import org.apache.dubbo.rpc.cluster.directory.AbstractDirectory;
import org.apache.dubbo.rpc.cluster.router.state.BitList;
-import java.util.Collections;
import java.util.List;
import static org.apache.dubbo.common.constants.CommonConstants.ANY_VALUE;
@@ -175,7 +174,7 @@ public abstract class DynamicDirectory<T> extends AbstractDirectory<T> implement
}
if (multiGroup) {
- return this.invokers == null ? BitList.emptyList() : this.invokers;
+ return this.getInvokers();
}
try {
@@ -195,7 +194,7 @@ public abstract class DynamicDirectory<T> extends AbstractDirectory<T> implement
@Override
public List<Invoker<T>> getAllInvokers() {
- return this.invokers == null ? Collections.emptyList() : this.invokers;
+ return this.getInvokers();
}
/**
@@ -258,8 +257,8 @@ public abstract class DynamicDirectory<T> extends AbstractDirectory<T> implement
if (isDestroyed() || this.forbidden) {
return false;
}
- return CollectionUtils.isNotEmpty(validInvokers)
- && validInvokers.stream().anyMatch(Invoker::isAvailable);
+ return CollectionUtils.isNotEmpty(getValidInvokers())
+ && getValidInvokers().stream().anyMatch(Invoker::isAvailable);
}
@Override
diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryDirectory.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryDirectory.java
index d02823b..e53c900 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryDirectory.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryDirectory.java
@@ -203,9 +203,7 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
&& invokerUrls.get(0) != null
&& EMPTY_PROTOCOL.equals(invokerUrls.get(0).getProtocol())) {
this.forbidden = true; // Forbid to access
- this.invokers = BitList.emptyList();
- this.validInvokers = BitList.emptyList();
- routerChain.setInvokers(this.invokers);
+ routerChain.setInvokers(BitList.emptyList());
destroyAllInvokers(); // Close all invokers
} else {
this.forbidden = false; // Allow to access
@@ -213,22 +211,27 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
if (invokerUrls == Collections.<URL>emptyList()) {
invokerUrls = new ArrayList<>();
}
- if (invokerUrls.isEmpty() && this.cachedInvokerUrls != null) {
- invokerUrls.addAll(this.cachedInvokerUrls);
+ // use local reference to avoid NPE as this.cachedInvokerUrls will be set null by destroyAllInvokers().
+ Set<URL> localCachedInvokerUrls = this.cachedInvokerUrls;
+ if (invokerUrls.isEmpty() && localCachedInvokerUrls != null) {
+ invokerUrls.addAll(localCachedInvokerUrls);
} else {
- this.cachedInvokerUrls = new HashSet<>();
- this.cachedInvokerUrls.addAll(invokerUrls);//Cached invoker urls, convenient for comparison
+ localCachedInvokerUrls = new HashSet<>();
+ localCachedInvokerUrls.addAll(invokerUrls);//Cached invoker urls, convenient for comparison
+ this.cachedInvokerUrls = localCachedInvokerUrls;
}
if (invokerUrls.isEmpty()) {
return;
}
-
- // can't use local reference because this.urlInvokerMap might be accessed at isAvailable() by main thread concurrently.
+
+ // use local reference to avoid NPE as this.urlInvokerMap will be set null concurrently at destroyAllInvokers().
+ Map<URL, Invoker<T>> localUrlInvokerMap = this.urlInvokerMap;
+ // can't use local reference as oldUrlInvokerMap's mappings might be removed directly at toInvokers().
Map<URL, Invoker<T>> oldUrlInvokerMap = null;
- if (this.urlInvokerMap != null) {
+ if (localUrlInvokerMap != null) {
// the initial capacity should be set greater than the maximum number of entries divided by the load factor to avoid resizing.
- oldUrlInvokerMap = new LinkedHashMap<>(Math.round(1 + this.urlInvokerMap.size() / DEFAULT_HASHMAP_LOAD_FACTOR));
- this.urlInvokerMap.forEach(oldUrlInvokerMap::put);
+ oldUrlInvokerMap = new LinkedHashMap<>(Math.round(1 + localUrlInvokerMap.size() / DEFAULT_HASHMAP_LOAD_FACTOR));
+ localUrlInvokerMap.forEach(oldUrlInvokerMap::put);
}
Map<URL, Invoker<T>> newUrlInvokerMap = toInvokers(oldUrlInvokerMap, invokerUrls);// Translate url list to Invoker map
@@ -247,9 +250,9 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
}
List<Invoker<T>> newInvokers = Collections.unmodifiableList(new ArrayList<>(newUrlInvokerMap.values()));
- this.invokers = multiGroup ? new BitList<>(toMergeInvokerList(newInvokers)) : new BitList<>(newInvokers);
+ this.setInvokers(multiGroup ? new BitList<>(toMergeInvokerList(newInvokers)) : new BitList<>(newInvokers));
// pre-route and build cache
- routerChain.setInvokers(this.invokers);
+ routerChain.setInvokers(this.getInvokers());
this.urlInvokerMap = newUrlInvokerMap;
try {
@@ -322,7 +325,7 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
* Turn urls into invokers, and if url has been refer, will not re-reference.
* the items that will be put into newUrlInvokeMap will be removed from oldUrlInvokerMap.
*
- * @param oldUrlInvokerMap
+ * @param oldUrlInvokerMap it might be modified during the process.
* @param urls
* @return invokers
*/
@@ -485,9 +488,10 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
}
localUrlInvokerMap.clear();
}
- invokers = null;
- validInvokers = null;
- cachedInvokerUrls = null;
+
+ this.urlInvokerMap = null;
+ this.cachedInvokerUrls = null;
+ destroyInvokers();
}
private void destroyUnusedInvokers(Map<URL, Invoker<T>> oldUrlInvokerMap, Map<URL, Invoker<T>> newUrlInvokerMap) {
@@ -524,7 +528,7 @@ public class RegistryDirectory<T> extends DynamicDirectory<T> {
@Override
public List<Invoker<T>> getAllInvokers() {
- return this.invokers == null ? Collections.emptyList() : this.invokers;
+ return this.getInvokers();
}
@Override