Fix memory leak

src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java

@@ -846,7 +846,7 @@ public void setDelayLoadingLobs(boolean b) {
      */
     public static synchronized void registerColumnEncryptionKeyStoreProviders(
             Map<String, SQLServerColumnEncryptionKeyStoreProvider> clientKeyStoreProviders) throws SQLServerException {
-        loggerExternal.entering(loggingClassName, "registerColumnEncryptionKeyStoreProviders",
+        loggerExternal.entering(loggingClassNameBase, "registerColumnEncryptionKeyStoreProviders",
                 "Registering Column Encryption Key Store Providers");
 
         if (null == clientKeyStoreProviders) {
@@ -883,7 +883,7 @@ public static synchronized void registerColumnEncryptionKeyStoreProviders(
             globalCustomColumnEncryptionKeyStoreProviders.put(entry.getKey(), entry.getValue());
         }
 
-        loggerExternal.exiting(loggingClassName, "registerColumnEncryptionKeyStoreProviders",
+        loggerExternal.exiting(loggingClassNameBase, "registerColumnEncryptionKeyStoreProviders",
                 "Number of Key store providers that are registered:"
                         + globalCustomColumnEncryptionKeyStoreProviders.size());
     }
@@ -893,15 +893,15 @@ public static synchronized void registerColumnEncryptionKeyStoreProviders(
      * the map and setting it to null.
      */
     public static synchronized void unregisterColumnEncryptionKeyStoreProviders() {
-        loggerExternal.entering(loggingClassName, "unregisterColumnEncryptionKeyStoreProviders",
+        loggerExternal.entering(loggingClassNameBase, "unregisterColumnEncryptionKeyStoreProviders",
                 "Removing Column Encryption Key Store Provider");
 
         if (null != globalCustomColumnEncryptionKeyStoreProviders) {
             globalCustomColumnEncryptionKeyStoreProviders.clear();
             globalCustomColumnEncryptionKeyStoreProviders = null;
         }
 
-        loggerExternal.exiting(loggingClassName, "unregisterColumnEncryptionKeyStoreProviders",
+        loggerExternal.exiting(loggingClassNameBase, "unregisterColumnEncryptionKeyStoreProviders",
                 "Number of Key store providers that are registered: 0");
     }
 
@@ -978,7 +978,7 @@ synchronized SQLServerColumnEncryptionKeyStoreProvider getColumnEncryptionKeySto
      */
     public static synchronized void setColumnEncryptionTrustedMasterKeyPaths(
             Map<String, List<String>> trustedKeyPaths) {
-        loggerExternal.entering(loggingClassName, "setColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.entering(loggingClassNameBase, "setColumnEncryptionTrustedMasterKeyPaths",
                 "Setting Trusted Master Key Paths");
 
         // Use upper case for server and instance names.
@@ -987,7 +987,7 @@ public static synchronized void setColumnEncryptionTrustedMasterKeyPaths(
             columnEncryptionTrustedMasterKeyPaths.put(entry.getKey().toUpperCase(), entry.getValue());
         }
 
-        loggerExternal.exiting(loggingClassName, "setColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.exiting(loggingClassNameBase, "setColumnEncryptionTrustedMasterKeyPaths",
                 "Number of Trusted Master Key Paths: " + columnEncryptionTrustedMasterKeyPaths.size());
     }
 
@@ -1001,13 +1001,13 @@ public static synchronized void setColumnEncryptionTrustedMasterKeyPaths(
      */
     public static synchronized void updateColumnEncryptionTrustedMasterKeyPaths(String server,
             List<String> trustedKeyPaths) {
-        loggerExternal.entering(loggingClassName, "updateColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.entering(loggingClassNameBase, "updateColumnEncryptionTrustedMasterKeyPaths",
                 "Updating Trusted Master Key Paths");
 
         // Use upper case for server and instance names.
         columnEncryptionTrustedMasterKeyPaths.put(server.toUpperCase(), trustedKeyPaths);
 
-        loggerExternal.exiting(loggingClassName, "updateColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.exiting(loggingClassNameBase, "updateColumnEncryptionTrustedMasterKeyPaths",
                 "Number of Trusted Master Key Paths: " + columnEncryptionTrustedMasterKeyPaths.size());
     }
 
@@ -1018,13 +1018,13 @@ public static synchronized void updateColumnEncryptionTrustedMasterKeyPaths(Stri
      *        String server name
      */
     public static synchronized void removeColumnEncryptionTrustedMasterKeyPaths(String server) {
-        loggerExternal.entering(loggingClassName, "removeColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.entering(loggingClassNameBase, "removeColumnEncryptionTrustedMasterKeyPaths",
                 "Removing Trusted Master Key Paths");
 
         // Use upper case for server and instance names.
         columnEncryptionTrustedMasterKeyPaths.remove(server.toUpperCase());
 
-        loggerExternal.exiting(loggingClassName, "removeColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.exiting(loggingClassNameBase, "removeColumnEncryptionTrustedMasterKeyPaths",
                 "Number of Trusted Master Key Paths: " + columnEncryptionTrustedMasterKeyPaths.size());
     }
 
@@ -1034,7 +1034,7 @@ public static synchronized void removeColumnEncryptionTrustedMasterKeyPaths(Stri
      * @return columnEncryptionTrustedMasterKeyPaths.
      */
     public static synchronized Map<String, List<String>> getColumnEncryptionTrustedMasterKeyPaths() {
-        loggerExternal.entering(loggingClassName, "getColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.entering(loggingClassNameBase, "getColumnEncryptionTrustedMasterKeyPaths",
                 "Getting Trusted Master Key Paths");
 
         Map<String, List<String>> masterKeyPathCopy = new HashMap<>();
@@ -1043,7 +1043,7 @@ public static synchronized Map<String, List<String>> getColumnEncryptionTrustedM
             masterKeyPathCopy.put(entry.getKey(), entry.getValue());
         }
 
-        loggerExternal.exiting(loggingClassName, "getColumnEncryptionTrustedMasterKeyPaths",
+        loggerExternal.exiting(loggingClassNameBase, "getColumnEncryptionTrustedMasterKeyPaths",
                 "Number of Trusted Master Key Paths: " + masterKeyPathCopy.size());
 
         return masterKeyPathCopy;
@@ -1214,7 +1214,8 @@ final SQLCollation getDatabaseCollation() {
             .getLogger("com.microsoft.sqlserver.jdbc.internals.SQLServerConnection");
     static final private java.util.logging.Logger loggerExternal = java.util.logging.Logger
             .getLogger("com.microsoft.sqlserver.jdbc.Connection");
-    private static String loggingClassName = "com.microsoft.sqlserver.jdbc.SQLServerConnection:";
+    private static String loggingClassNameBase = "com.microsoft.sqlserver.jdbc.SQLServerConnection";
+    private String loggingClassName = loggingClassNameBase;
 
     /**
      * There are three ways to get a failover partner connection string, from the failover map, the connecting server
@@ -1297,7 +1298,7 @@ final boolean attachConnId() {
     SQLServerConnection(String parentInfo) throws SQLServerException {
         int connectionID = nextConnectionID(); // sequential connection id
         traceID = "ConnectionID:" + connectionID;
-        loggingClassName += connectionID;
+        loggingClassName += ":" + connectionID;
         if (connectionlogger.isLoggable(Level.FINE))
             connectionlogger.fine(toString() + " created by (" + parentInfo + ")");
         initResettableValues();