Закрывайте коннекты, неизлечимые.

LaunchServer/src/main/java/ru/gravit/launchserver/auth/handler/MySQLAuthHandler.java

@@ -4,6 +4,7 @@
 import ru.gravit.utils.helper.LogHelper;
 
 import java.io.IOException;
+import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -64,8 +65,9 @@ protected Entry fetchEntry(UUID uuid) throws IOException {
     }
 
     private Entry query(String sql, String value) throws IOException {
+        Connection conn = mySQLHolder.getConnection();
         try {
-            PreparedStatement s = mySQLHolder.getConnection().prepareStatement(sql);
+            PreparedStatement s = conn.prepareStatement(sql);
             s.setString(1, value);
             s.setQueryTimeout(MySQLSourceConfig.TIMEOUT);
             try (ResultSet set = s.executeQuery()) {
@@ -73,13 +75,17 @@ private Entry query(String sql, String value) throws IOException {
             }
         } catch (SQLException e) {
             throw new IOException(e);
+        } finally {
+            if (conn != null)
+                conn.close();
         }
     }
 
     @Override
     protected boolean updateAuth(UUID uuid, String username, String accessToken) throws IOException {
+        Connection conn = mySQLHolder.getConnection();
         try {
-            PreparedStatement s = mySQLHolder.getConnection().prepareStatement(updateAuthSQL);
+            PreparedStatement s = conn.prepareStatement(updateAuthSQL);
             s.setString(1, username); // Username case
             s.setString(2, accessToken);
             s.setString(3, uuid.toString());
@@ -87,19 +93,26 @@ protected boolean updateAuth(UUID uuid, String username, String accessToken) thr
             return s.executeUpdate() > 0;
         } catch (SQLException e) {
             throw new IOException(e);
+        } finally {
+            if (conn != null)
+                conn.close();
         }
     }
 
     @Override
     protected boolean updateServerID(UUID uuid, String serverID) throws IOException {
+        Connection conn = mySQLHolder.getConnection();
         try {
-            PreparedStatement s = mySQLHolder.getConnection().prepareStatement(updateServerIDSQL);
+            PreparedStatement s = conn.prepareStatement(updateServerIDSQL);
             s.setString(1, serverID);
             s.setString(2, uuid.toString());
             s.setQueryTimeout(MySQLSourceConfig.TIMEOUT);
             return s.executeUpdate() > 0;
         } catch (SQLException e) {
             throw new IOException(e);
+        } finally {
+            if (conn != null)
+                conn.close();
         }
     }
 }

LaunchServer/src/main/java/ru/gravit/launchserver/auth/hwid/MysqlHWIDHandler.java

@@ -63,8 +63,8 @@ public class MysqlHWIDHandler extends HWIDHandler {
     public void check0(HWID hwid, String username) throws HWIDException {
         if (hwid instanceof OshiHWID) {
             OshiHWID oshiHWID = (OshiHWID) hwid;
+            Connection c = mySQLHolder.getConnection();
             try {
-                Connection c = mySQLHolder.getConnection();
 
                 PreparedStatement s = c.prepareStatement(String.format("SELECT %s, %s FROM `%s` WHERE `%s` = ? LIMIT 1",
                         userFieldHwid, userFieldLogin, tableUsers, userFieldLogin));
@@ -84,6 +84,9 @@ public void check0(HWID hwid, String username) throws HWIDException {
                 }
             } catch (SQLException e) {
                 e.printStackTrace();
+            } finally {
+                if (c != null)
+                    c.close();
             }
         }
     }
@@ -178,13 +181,9 @@ public void setIsBanned(HWID hwid, boolean isBanned) {
         LogHelper.debug("%s Request HWID: %s", isBanned ? "Ban" : "UnBan", hwid.toString());
         if (hwid instanceof OshiHWID) {
             OshiHWID oshiHWID = (OshiHWID) hwid;
-            Connection c = null;
+            Connection c = mySQLHolder.getConnection();
             try {
-                c = mySQLHolder.getConnection();
+                PreparedStatement a = c.prepareStatement(queryBan)
-            } catch (SQLException e) {
-                e.printStackTrace();
-            }
-            try (PreparedStatement a = c.prepareStatement(queryBan)) {
                 String[] replaceParamsUpd = {"totalMemory", String.valueOf(oshiHWID.totalMemory), "serialNumber", oshiHWID.serialNumber, "HWDiskSerial", oshiHWID.HWDiskSerial, "processorID", oshiHWID.processorID, "isBanned", isBanned ? "1" : "0"};
                 for (int i = 0; i < paramsBan.length; i++) {
                     a.setString(i + 1, CommonHelper.replace(paramsBan[i], replaceParamsUpd));
@@ -193,6 +192,9 @@ public void setIsBanned(HWID hwid, boolean isBanned) {
                 a.executeUpdate();
             } catch (SQLException e) {
                 e.printStackTrace();
+            } finally {
+                if (c != null)
+                    c.close();
             }
         }
     }
@@ -214,9 +216,9 @@ public void unban(List<HWID> list) {
     @Override
     public List<HWID> getHwid(String username) {
         ArrayList<HWID> list = new ArrayList<>();
+        Connection c = mySQLHolder.getConnection();
         try {
             LogHelper.debug("Try find HWID from username %s", username);
-            Connection c = mySQLHolder.getConnection();
             PreparedStatement s = c.prepareStatement(String.format("SELECT %s, %s FROM `%s` WHERE `%s` = ? LIMIT 1", userFieldHwid, userFieldLogin, tableUsers, userFieldLogin));
             s.setString(1, username);
 
@@ -245,6 +247,9 @@ public List<HWID> getHwid(String username) {
             }
         } catch (SQLException e) {
             e.printStackTrace();
+        } finally {
+            if (c != null)
+                c.close();
         }
         return list;
     }

LaunchServer/src/main/java/ru/gravit/launchserver/auth/provider/MySQLAuthProvider.java

@@ -8,6 +8,7 @@
 import ru.gravit.utils.helper.LogHelper;
 import ru.gravit.utils.helper.SecurityHelper;
 
+import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -28,15 +29,21 @@ public void init() {
 
     @Override
     public AuthProviderResult auth(String login, String password, String ip) throws SQLException, AuthException {
-        PreparedStatement s = mySQLHolder.getConnection().prepareStatement(query);
+        Connection conn = mySQLHolder.getConnection();
-        String[] replaceParams = {"login", login, "password", password, "ip", ip};
+        try {
-        for (int i = 0; i < queryParams.length; i++)
+           PreparedStatement s = conn.prepareStatement(query);
-            s.setString(i + 1, CommonHelper.replace(queryParams[i], replaceParams));
+           String[] replaceParams = {"login", login, "password", password, "ip", ip};
+           for (int i = 0; i < queryParams.length; i++)
+               s.setString(i + 1, CommonHelper.replace(queryParams[i], replaceParams));
 
-        // Execute SQL query
+           // Execute SQL query
-        s.setQueryTimeout(MySQLSourceConfig.TIMEOUT);
+           s.setQueryTimeout(MySQLSourceConfig.TIMEOUT);
-        try (ResultSet set = s.executeQuery()) {
+           try (ResultSet set = s.executeQuery()) {
-            return set.next() ? new AuthProviderResult(set.getString(1), SecurityHelper.randomStringToken(), usePermission ? new ClientPermissions(set.getLong(2)) : LaunchServer.server.config.permissionsHandler.getPermissions(set.getString(1))) : authError(message);
+               return set.next() ? new AuthProviderResult(set.getString(1), SecurityHelper.randomStringToken(), usePermission ? new ClientPermissions(set.getLong(2)) : LaunchServer.server.config.permissionsHandler.getPermissions(set.getString(1))) : authError(message);
+           }
+        } finally {
+            if (conn != null)
+                conn.close();
         }
     }