将所有的线程改为守护线程

skywalking-alarm/src/main/java/com/a/eye/skywalking/alarm/AlarmMessageProcessThread.java

@@ -37,6 +37,7 @@ public class AlarmMessageProcessThread extends Thread {
     public AlarmMessageProcessThread() {
         // 初始化生成ThreadId
         threadId = UUID.randomUUID().toString();
+        this.setDaemon(true);
     }
 
     @Override

skywalking-alarm/src/main/java/com/a/eye/skywalking/alarm/UserInfoCoordinator.java

@@ -31,6 +31,7 @@ public class UserInfoCoordinator extends Thread {
     private boolean isCoordinator = false;
 
     public UserInfoCoordinator() {
+        this.setDaemon(true);
     }
 
     @Override

skywalking-alarm/src/main/java/com/a/eye/skywalking/alarm/UsersChangedDetectionThread.java

@@ -19,6 +19,10 @@ public class UsersChangedDetectionThread extends Thread {
     private String userIdsEncryptedStr;
     private Logger logger = LogManager.getLogger(UsersChangedDetectionThread.class);
 
+    public UsersChangedDetectionThread() {
+        this.setDaemon(true);
+    }
+
     public void run() {
         while (true) {
             try {

skywalking-collector/skywalking-api/src/main/java/com/a/eye/skywalking/buffer/BufferGroup.java

@@ -61,6 +61,7 @@ public class BufferGroup {
             super("ConsumerWorker");
             this.start = start;
             this.end = end;
+            this.setDaemon(true);
         }
 
         @Override

skywalking-collector/skywalking-api/src/main/java/com/a/eye/skywalking/selfexamination/SDKHealthCollector.java

@@ -18,6 +18,7 @@ public class SDKHealthCollector extends Thread {
 
 	private SDKHealthCollector() {
 		super("HealthCollector");
+		this.setDaemon(true);
 	}
 
 	public static void init() {

skywalking-collector/skywalking-api/src/main/java/com/a/eye/skywalking/sender/DataSenderFactoryWithBalance.java

@@ -102,6 +102,7 @@ public class DataSenderFactoryWithBalance {
     public static class DataSenderChecker extends Thread {
         public DataSenderChecker() {
             super("Data-Sender-Checker");
+            this.setDaemon(true);
         }
 
         @Override

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/buffer/AppendEOFFlagThread.java

@@ -19,6 +19,7 @@ class AppendEOFFlagThread extends Thread {
         super("AppendEOFFlagThread");
         this.dataBufferFiles = dataBufferFiles;
         this.countDownLatch = countDownLatch;
+        this.setDaemon(true);
     }
 
     @Override

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/buffer/DataBufferThread.java

@@ -26,6 +26,7 @@ public class DataBufferThread extends Thread {
 
     public DataBufferThread(int threadIdx) {
         super("DataBufferThread_" + threadIdx);
+        this.setDaemon(true);
     }
 
     @Override

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/peresistent/PersistenceThread.java

@@ -24,6 +24,7 @@ public class    PersistenceThread extends Thread {
 
     public PersistenceThread(int trdIndex) {
         super("PersistentThread" + trdIndex);
+        this.setDaemon(true);
     }
 
     @Override

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/peresistent/RegisterPersistenceThread.java

@@ -30,6 +30,7 @@ public class RegisterPersistenceThread extends Thread {
                 Config.RegisterPersistence.REGISTER_FILE_PARENT_DIRECTORY, Config.RegisterPersistence.REGISTER_FILE_NAME);
         bakOffsetFile = new File(
                 Config.RegisterPersistence.REGISTER_FILE_PARENT_DIRECTORY, Config.RegisterPersistence.REGISTER_BAK_FILE_NAME);
+        this.setDaemon(true);
     }
 
     @Override

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/processor/ackspan/alarm/AlarmRedisConnector.java

@@ -57,6 +57,7 @@ public class AlarmRedisConnector {
                     Config.Alarm.ALARM_OFF_FLAG = true;
                 }
             }
+            this.setDaemon(true);
         }
 
         private RedisInspector connect() {

skywalking-server/src/main/java/com/a/eye/skywalking/reciever/selfexamination/ServerHealthCollector.java

@@ -14,11 +14,12 @@ public class ServerHealthCollector extends Thread {
 
     private static Map<String, ServerHeathReading> heathReadings = new ConcurrentHashMap<String, ServerHeathReading>();
 
-	private ServerHealthCollector(){
+    private ServerHealthCollector() {
         super("ServerHealthCollector");
+        this.setDaemon(true);
     }
 
-	public static void init(){
+    public static void init() {
         new ServerHealthCollector().start();
     }
 
@@ -27,8 +28,9 @@ public class ServerHealthCollector extends Thread {
         if (!heathReadings.containsKey(id)) {
             synchronized (heathReadings) {
                 if (!heathReadings.containsKey(id)) {
-					if(heathReadings.keySet().size() > 5000){
-						throw new RuntimeException("use ServerHealthCollector illegal. There is an overflow trend of Server Health Collector Report Data.");
+                    if (heathReadings.keySet().size() > 5000) {
+                        throw new RuntimeException(
+                                "use ServerHealthCollector illegal. There is an overflow trend of Server Health Collector Report Data.");
                     }
                     heathReadings.put(id, new ServerHeathReading(id));
                 }
@@ -38,11 +40,10 @@ public class ServerHealthCollector extends Thread {
     }
 
     private static String getId(String extraId) {
-		return "SkyWalkingServer,M:" + MachineUtil.getHostDesc() + ",P:"
-				+ MachineUtil.getProcessNo() + ",T:"
-				+ Thread.currentThread().getName() + "("
-				+ Thread.currentThread().getId() + ")"
-				+ (extraId == null ? "" : ",extra:" + extraId);
+        return "SkyWalkingServer,M:" + MachineUtil.getHostDesc() + ",P:" + MachineUtil.getProcessNo() + ",T:" + Thread
+                .currentThread().getName() + "(" + Thread.currentThread().getId() + ")" + (extraId == null ?
+                "" :
+                ",extra:" + extraId);
     }
 
     @Override
@@ -55,7 +56,7 @@ public class ServerHealthCollector extends Thread {
                 Arrays.sort(keyList);
                 StringBuilder log = new StringBuilder();
                 log.append("\n---------Server Health Collector Report---------\n");
-				for(String key : keyList){
+                for (String key : keyList) {
                     log.append(heathReadingsSnapshot.get(key)).append("\n");
                 }
                 log.append("------------------------------------------------\n");