[en][help l2j] strange problem with subclass

[flaguz]

hy guys i have  very big problem with my gs , when a player change subclass i have this error and server freeze for 4-5 second

DayNightSpawnManager: Removed 601 night creatures
DayNightSpawnManager: Spawned 232 day creatures
DayNightSpawnManager: Deleting Hellman raidboss
Unclosed connection! Trace: sun.reflect.GeneratedMethodAccessor13.invoke(Unknown
Source)
java.lang.RuntimeException
        at com.l2jserver.L2DatabaseFactory.getConnection(L2DatabaseFactory.java:
223)
        at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.python.core.PyReflectedFunction.__call__(Unknown Source)
        at org.python.core.PyMethod.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyInstance.invoke(Unknown Source)
        at org.python.pycode.serializable._pyx1289912980775.buildHtml$19(__init_
_.py:344)
        at org.python.pycode.serializable._pyx1289912980775.call_function(__init
__.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.pycode.serializable._pyx1289912980775.onAdvEvent$14(__init
__.py:828)
        at org.python.pycode.serializable._pyx1289912980775.call_function(__init
__.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyMethod.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyObject._jcallexc(Unknown Source)
        at org.python.core.PyObject._jcall(Unknown Source)
        at org.python.proxies.main$Quest$423.onAdvEvent(Unknown Source)
        at com.l2jserver.gameserver.model.quest.Quest.notifyEvent(Quest.java:405
)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.processQue
stEvent(L2PcInstance.java:1790)
        at com.l2jserver.gameserver.network.clientpackets.RequestBypassToServer.
runImpl(RequestBypassToServer.java:221)
        at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.run
(L2GameClientPacket.java:93)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)