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L2J Revision 3886:
L2JDP Revision 6988:

java.lang.NullPointerException
at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.doAutoLoot(L2PcInstance.java:4747)
at com.l2jserver.gameserver.model.actor.L2Attackable.doItemDrop(L2Attackable.java:1481)
at com.l2jserver.gameserver.model.actor.L2Attackable.doItemDrop(L2Attackable.java:1392)
at com.l2jserver.gameserver.model.actor.L2Attackable.calculateRewards(L2Attackable.java:538)
at com.l2jserver.gameserver.model.actor.L2Character.doDie(L2Character.java:2086)
at com.l2jserver.gameserver.model.actor.L2Npc.doDie(L2Npc.java:2667)
at com.l2jserver.gameserver.model.actor.L2Attackable.doDie(L2Attackable.java:466)
at com.l2jserver.gameserver.model.actor.instance.L2MonsterInstance.doDie(L2MonsterInstance.java:204)
at com.l2jserver.gameserver.model.actor.status.CharStatus.reduceHp(CharStatus.java:196)
at com.l2jserver.gameserver.model.actor.status.NpcStatus.reduceHp(NpcStatus.java:51)
at com.l2jserver.gameserver.model.actor.status.AttackableStatus.reduceHp(AttackableStatus.java:49)
at com.l2jserver.gameserver.model.actor.L2Character.reduceCurrentHp(L2Character.java:6792)
at com.l2jserver.gameserver.model.actor.L2Attackable.reduceCurrentHp(L2Attackable.java:437)
at com.l2jserver.gameserver.model.actor.L2Attackable.reduceCurrentHp(L2Attackable.java:373)
at handlers.skillhandlers.Mdam.useSkill(Mdam.java:175)
at com.l2jserver.gameserver.model.actor.L2Character.callSkill(L2Character.java:6433)
at com.l2jserver.gameserver.model.actor.L2Character.onMagicHitTimer(L2Character.java:6138)
at com.l2jserver.gameserver.model.actor.L2Character$MagicUseTask.run(L2Character.java:2534)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
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)

Can you give me some idea to why?

"java.lang.NullPointerException
at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.doAutoLoot(L2PcInstance.java:4747)"

You should take a look at this doAutoLoot function. It may have got an attackable instance as value that is null.

If it is possible cause this error some server lag? Maybe the server doesn't reach the database for a sec?

Another.... is it possible to catch the error? i need some debug information.... and some advice how i can?

adamss wrote:If it is possible cause this error some server lag? Maybe the server doesn't reach the database for a sec?

Another.... is it possible to catch the error? i need some debug information.... and some advice how i can?

Server loads everything into the memory on start. It uses database only for writing. Put a try-catch in doAutoLoot and under catch execute some variable value to be written in the console.

You mean something like this?

And where is the line 4747 ?

_DS_ wrote:And where is the line 4747 ?

That's what he hasn't told us yet.
it shows under doAutoLoot to me, so adamss may have some patches in L2PcInstance.

yeah, i have some modification..

line 4747: "if (isInParty()&&ItemTable.getInstance().getTemplate(item.getItemId()).getItemType() != L2EtcItemType.HERB)
"

adamss wrote:yeah, i have some modification..

line 4747: "if (isInParty()&&ItemTable.getInstance().getTemplate(item.getItemId()).getItemType() != L2EtcItemType.HERB)
"

Java is very sensitive for exceptions, so I think it may be ItemTable.getInstance().getTemplate(item.getItemId()) that returns null at this line, but you don't need to worry. Just put an empty or a one line warning for the catch and there will be no more multi-line errors for you.

So it'd better solution than making checks for each function. If Java finds an exception it will stop at that line and not query lines under that exception is found at.