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我正在使用3.8.1，我注意到在成員退出後，客戶端周圍的重新連接行爲存在一些問題。儘管設置了重新連接嘗試，但是在記錄了關於無法獲得羣集連接的重複警告之後，客戶端經常斷開連接 - 儘管始終存在至少一個倖存的成員。Hazelcast在成員重新啓動後終止客戶端連接
那麼爲什麼斷開連接發生？我相信，如果至少有一個成員存在，則不應斷開任何客戶的連接。 爲什麼客戶在會員反彈後反覆登錄併發出警告？
測試： 我有2位成員加入。 我有3個客戶端通過tcp連接到兩個成員。 客戶端配置爲重新連接1000次。 客戶端1循環並簡單地將一個隨機值放入同一個密鑰。 客戶端2 & 3是此地圖的監聽者並記錄更新。
步驟： 啓動成員1，成員2. 啓動客戶端2,3（偵聽器）。 開始客戶端1（作家）。 此時一切正常。日誌中沒有警告。
退回成員1，等待它開始。 反射構件2. 反射構件1
並非總是如此，但很多時候，客戶反映這樣的：
Put 29: d16b0acd-d0d6-4722-b511-7fd975774f8c
May 10, 2017 11:41:10 AM com.hazelcast.client.spi.impl.ClusterListenerSupport
WARNING: hz.client_0 [dev] [3.8.1] Unable to get alive cluster connection, try in 0 ms later, attempt 4 of 1000.
May 10, 2017 11:41:10 AM com.hazelcast.client.spi.impl.ClusterListenerSupport
INFO: hz.client_0 [dev] [3.8.1] Trying to connect to [127.0.0.1]:5701 as owner member
Put 30: f91ec949-19bd-4039-95d3-28c7abd0f241
May 10, 2017 11:41:15 AM com.hazelcast.client.spi.impl.ClusterListenerSupport
INFO: hz.client_0 [dev] [3.8.1] Trying to connect to [127.0.0.1]:5702 as owner member
Put 31: 2af9fb36-d501-4b0b-9fc8-6b36d467a929
May 10, 2017 11:41:20 AM com.hazelcast.client.spi.impl.ClusterListenerSupport
INFO: hz.client_0 [dev] [3.8.1] Trying to connect to [127.0.0.1]:5701 as owner member
Put 32: f08bd6ca-a79f-44f4-9064-42e47953c37a
的客戶端仍然可以工作，而且還要聽事件，但一段時間後，他們經常斷開連接：
May 10, 2017 11:25:04 AM com.hazelcast.core.LifecycleService
INFO: hz.client_0 [dev] [3.8.1] HazelcastClient 3.8.1 (20170411 - f1e9264) is SHUTTING_DOWN
May 10, 2017 11:25:04 AM com.hazelcast.client.connection.ClientConnectionManager
INFO: hz.client_0 [dev] [3.8.1] Removed connection to endpoint: [localhost]:5701, connection: ClientConnection{alive=false, connectionId=5, socketChannel=DefaultSocketChannelWrapper{socketChannel=java.nio.channels.SocketChannel[closed]}, remoteEndpoint=[localhost]:5701, lastReadTime=2017-05-10 11:25:04.021, lastWriteTime=2017-05-10 11:25:04.084, closedTime=2017-05-10 11:25:04.084, lastHeartbeatRequested=2017-05-10 11:25:03.834, lastHeartbeatReceived=2017-05-10 11:25:03.834, connected server version=3.8.1}
May 10, 2017 11:25:04 AM com.hazelcast.client.connection.ClientConnectionManager
INFO: hz.client_0 [dev] [3.8.1] Removed connection to endpoint: [localhost]:5702, connection: ClientConnection{alive=false, connectionId=6, socketChannel=DefaultSocketChannelWrapper{socketChannel=java.nio.channels.SocketChannel[closed]}, remoteEndpoint=[localhost]:5702, lastReadTime=2017-05-10 11:24:59.513, lastWriteTime=2017-05-10 11:25:04.084, closedTime=2017-05-10 11:25:04.084, lastHeartbeatRequested=2017-05-10 11:17:43.840, lastHeartbeatReceived=2017-05-10 11:17:43.840, connected server version=3.8.1}
May 10, 2017 11:25:04 AM com.hazelcast.core.LifecycleService
INFO: hz.client_0 [dev] [3.8.1] HazelcastClient 3.8.1 (20170411 - f1e9264) is SHUTDOWN
客戶端斷開：
INFO: hz.client_0 [dev] [3.8.1] Removed connection to endpoint: [localhost]:5701, connection: ClientConnection{alive=false, connectionId=8, socketChannel=DefaultSocketChannelWrapper{socketChannel=java.nio.channels.SocketChannel[closed]}, remoteEndpoint=[localhost]:5701, lastReadTime=2017-05-10 11:45:31.791, lastWriteTime=2017-05-10 11:45:31.791, closedTime=2017-05-10 11:45:31.791, lastHeartbeatRequested=2017-05-10 11:45:23.604, lastHeartbeatReceived=2017-05-10 11:45:23.605, connected server version=3.8.1}
May 10, 2017 11:45:31 AM com.hazelcast.core.LifecycleService
INFO: hz.client_0 [dev] [3.8.1] HazelcastClient 3.8.1 (20170411 - f1e9264) is CLIENT_DISCONNECTED
成員報告：
May 10, 2017 11:47:32 AM com.hazelcast.client.impl.protocol.task.AuthenticationMessageTask
WARNING: [localhost]:5701 [dev] [3.8.1] Member having uuid 8847c2e3-2fcb-428f-a827-d0e24f5624a1 is not part of the cluster. Client Authentication rejected.
May 10, 2017 11:47:32 AM com.hazelcast.client.impl.protocol.task.AuthenticationMessageTask
WARNING: [localhost]:5701 [dev] [3.8.1] Received auth from Connection[id=222, /127.0.0.1:5701->/127.0.0.1:53883, endpoint=null, alive=true, type=NONE] with principal ClientPrincipal{uuid='f1e5d928-23b2-4fdf-bd3f-9db1778a5a8c', ownerUuid='8847c2e3-2fcb-428f-a827-d0e24f5624a1'} , authentication failed
主要成員：
public class HzNodeTest {
private HazelcastInstance service;
@Before
public void setUp() throws Exception {
Config config = new Config();
JoinConfig join = config.getNetworkConfig().setPort(5701).getJoin();
join.getMulticastConfig().setEnabled(false);
join.getAwsConfig().setEnabled(false);
join.getTcpIpConfig().addMember("localhost:5701").addMember("localhost:5702").setEnabled(true);
service = Hazelcast.newHazelcastInstance(config);
}
@After
public void tearDown() throws Exception {
service.shutdown();
}
@Test
public void testStart() throws InterruptedException {
Thread.sleep(1000000000);
}
}
Secondary member:
public class HzNodeSecondaryTest {
private HazelcastInstance service;
@Before
public void setUp() throws Exception {
Config config = new Config();
JoinConfig join = config.getNetworkConfig().setPort(5702).getJoin();
join.getMulticastConfig().setEnabled(false);
join.getAwsConfig().setEnabled(false);
join.getTcpIpConfig().addMember("localhost:5701").addMember("localhost:5702").setEnabled(true);
service = Hazelcast.newHazelcastInstance(config);
}
@After
public void tearDown() throws Exception {
service.shutdown();
}
@Test
public void testStart() throws InterruptedException {
Thread.sleep(1000000000);
}
}
Listener:
public class HzListenerTest {
private HazelcastInstance service;
private AtomicLong counter = new AtomicLong();
@Before
public void setUp() throws Exception {
ClientConfig clientConfig = new ClientConfig();
clientConfig.getNetworkConfig().addAddress("localhost:5701").addAddress("localhost:5702").setConnectionAttemptLimit(1000);
service = HazelcastClient.newHazelcastClient(clientConfig);
}
@After
public void tearDown() throws Exception {
service.shutdown();
}
@Test
public void testListen() throws InterruptedException {
service.getMap("TEST").addEntryListener(new Listener(), true);
Thread.sleep(1000000);
}
private class Listener implements EntryAddedListener, EntryUpdatedListener, EntryRemovedListener,
EntryEvictedListener {
@Override
public void entryAdded(EntryEvent event) {
System.out.println("onAdded " + counter.getAndIncrement() + ": " + event);
}
@Override
public void entryEvicted(EntryEvent event) {
System.out.println("onEvicted " + counter.getAndIncrement() + ": " + event);
}
@Override
public void entryRemoved(EntryEvent event) {
System.out.println("onRemoved " + counter.getAndIncrement() + ": " + event);
}
@Override
public void entryUpdated(EntryEvent event) {
System.out.println("onUpdated " + counter.getAndIncrement() + ": "+ event);
}
}
}
Updater:
public class HzUpdaterTest {
private HazelcastInstance service;
@Before
public void setUp() throws Exception {
ClientConfig clientConfig = new ClientConfig();
clientConfig.getNetworkConfig().addAddress("localhost:5701").addAddress("localhost:5702").setConnectionAttemptLimit(1000);
service = HazelcastClient.newHazelcastClient(clientConfig);
service.getMap("TEST").put("1", UUID.randomUUID().toString());
}
@After
public void tearDown() throws Exception {
service.shutdown();
}
@Test
public void testSpin() {
for (int i = 0; i < 10000; i++) {
try {
String value = UUID.randomUUID().toString();
service.getMap("TEST").put("1", value);
System.out.println("Put " + i + ": " + value);
Thread.sleep(5000);
} catch (Exception ex) {
System.out.println(ex);
}
}
}
}