L2J Server

I have an unclosed connection can some one tell me how to fix and where to edit , i am newby at this:
Unclosed connection! Trace: sun.reflect.GeneratedMethodAccessor21.invoke(Unknown
Source)
java.lang.RuntimeException
at com.l2jserver.L2DatabaseFactory.getConnection(L2DatabaseFactory.java:
227)
at sun.reflect.GeneratedMethodAccessor21.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._pyx1307063722793.buildHtml$19(__init_
_.py:344)
at org.python.pycode.serializable._pyx1307063722793.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._pyx1307063722793.onAdvEvent$14(__init
__.py:831)
at org.python.pycode.serializable._pyx1307063722793.call_function(__init
__.py)
at org.python.core.PyTableCode.call(Unknown Source)
at org.python.core.PyTableCode.call(Unknown Source)
at org.python.core.PyTableCode.call(Unknown Source)
at org.python.core.PyFunction.__call__(Unknown Source)
at org.python.core.PyMethod.__call__(Unknown Source)
at org.python.core.PyObject.__call__(Unknown Source)
at org.python.core.PyObject._jcallexc(Unknown Source)
at org.python.core.PyObject._jcall(Unknown Source)
at org.python.proxies.main$Quest$425.onAdvEvent(Unknown Source)
at com.l2jserver.gameserver.model.quest.Quest.notifyEvent(Quest.java:448
)
at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.processQue
stEvent(L2PcInstance.java:1763)
at com.l2jserver.gameserver.network.clientpackets.RequestBypassToServer.
runImpl(RequestBypassToServer.java:212)
at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.run
(L2GameClientPacket.java:62)
at com.l2jserver.gameserver.network.L2GameClient.run(L2GameClient.java:1
001)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

thank you for using forum search