fix:fix config recreate NPE.

Author: SkyeBeFreeman

polaris-configuration/polaris-configuration-client/src/main/java/com/tencent/polaris/configuration/client/internal/ConfigFileLongPullService.java

@@ -107,15 +107,6 @@ public void addConfigFile(RemoteConfigFileRepo remoteConfigFileRepo) {
         }
     }
 
-    public void removeConfigFile(RemoteConfigFileRepo remoteConfigFileRepo) {
-        ConfigFileMetadata configFileMetadata = remoteConfigFileRepo.getConfigFileMetadata();
-        long version = remoteConfigFileRepo.getConfigFileVersion();
-        LOGGER.info("[Config] remove long polling config file. file = {}, version = {}", configFileMetadata, version);
-        configFilePool.remove(configFileMetadata);
-        //长轮询起始的配置文件版本号应该以第一次同步拉取为准
-        notifiedVersion.remove(configFileMetadata);
-    }
-
     private void startLongPollingTask() {
         if (!started.compareAndSet(false, true)) {
             return;
@@ -157,7 +148,7 @@ private void doLongPolling() {
                             changedConfigFile.getFileGroup(),
                             changedConfigFile.getFileName());
                     long newNotifiedVersion = changedConfigFile.getVersion();
-                    long oldNotifiedVersion = notifiedVersion.get(metadata);
+                    long oldNotifiedVersion = notifiedVersion.getOrDefault(metadata, -1L);
 
                     long maxVersion = newNotifiedVersion;
                     if (connector.isNotifiedVersionIncreaseStrictly()) {

polaris-configuration/polaris-configuration-client/src/main/java/com/tencent/polaris/configuration/client/internal/ConfigFileManager.java

@@ -119,17 +119,6 @@ public ConfigKVFile getConfigKVFile(ConfigFileMetadata configFileMetadata, Confi
         return configFile;
     }
 
-    public ConfigKVFile removeConfigKVFile(ConfigFileMetadata configFileMetadata) {
-        ConfigKVFile configFile = null;
-        synchronized (this) {
-            configFile = configPropertiesFileCache.get(configFileMetadata);
-            if (configFile != null) {
-                configFile = configPropertiesFileCache.remove(configFileMetadata);
-            }
-        }
-        return configFile;
-    }
-
     public ConfigFileResponse createConfigFile(CreateConfigFileRequest request) {
         com.tencent.polaris.api.plugin.configuration.ConfigFile configFile =
                 new com.tencent.polaris.api.plugin.configuration.ConfigFile(request.getNamespace(),

polaris-configuration/polaris-configuration-client/src/main/java/com/tencent/polaris/configuration/client/internal/RemoteConfigFileRepo.java

@@ -27,7 +27,6 @@
 import com.tencent.polaris.client.api.SDKContext;
 import com.tencent.polaris.client.util.NamedThreadFactory;
 import com.tencent.polaris.configuration.api.core.ConfigFileMetadata;
-import com.tencent.polaris.configuration.api.core.ConfigKVFile;
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -193,8 +192,6 @@ protected void doPull() {
                     //删除配置文件
                     if (remoteConfigFile.get() != null) {
                         remoteConfigFile.set(null);
-                        ConfigKVFile configKVFile = configFileManager.removeConfigKVFile(configFileMetadata);
-                        pullService.removeConfigFile(this);
                         //删除配置文件也需要触发通知
                         fireChangeEvent(null);
                     }