NoClassDefFoundError

Hi.

My plugin run fine but after few hours calling one class generate this error java.lang.NoClassDefFoundError
I use:
new ConfigChunk(targetchunk).access

Can somebody tell my how to solve this and why it's running good but after some hours of server running it's broke ?

I using still #1060

ConfigChung class declaration:

public class ConfigChunk {

public Integer id_chunk=0;
.... some varilables.....
public Integer access=1;

public ConfigChunk(OwnedChunk ownedchunk){

...... Database load....
access = owner_result.getInt("access");
}
}


Thanks

 

Could you give us the whole stacktrace? It will tell us the line it happened, and what was the class it didn't find... And I suppose you defined or imported all of your classes? Anything happens in your plugin after a few hours?

 

In the morning I start localhost server and in evening try why plugin don't work and I see this error


Error log:
2011-09-20 20:49:28 [SEVERE] Could not pass event BLOCK_BREAK to AutoRegionGuard
java.lang.NoClassDefFoundError: sk/kuk/arg/ConfigChunk
at sk.kuk.arg.RegionHandler.CanBuildHere(RegionHandler.java:413)
at sk.kuk.arg.RegionHandler.CanBuildHere(RegionHandler.java:400)
at sk.kuk.arg.listener.block.ARGBlockListener.onBlockBreak(ARGBlockListener.java:100)
at org.bukkit.plugin.java.JavaPluginLoader$37.execute(JavaPluginLoader.java:497)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:338)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:157)
at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:121)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:481)
at net.minecraft.server.Packet14BlockDig.a(SourceFile:42)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:89)
at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:454)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)



Code of Region Handler:

public boolean CanBuildHere(String player_name, OwnedChunk targetchunk) {
String playername = player_name.toLowerCase();
String owner=ClaimCheck(targetchunk);
if (owner.equalsIgnoreCase(playername)==true){
return true;
}
(line 413) if (plugin.FriendHandler.isafriend(playername, owner,new ConfigChunk(targetchunk).access)) return true;
return false;
}


And ConfigChunk class :






package sk.kuk.arg;

import java.sql.ResultSet;
import java.sql.SQLException;

public class ConfigChunk {

public Integer id_chunk=0;
public Integer fire=0;
public Integer explode=0;
public Integer door=0;
public Integer store=0;
public Integer access=1;
public Integer pitstone=0;
public Integer redstone=0;
public String owner="";
public String name="";
public String text="";
public ConfigChunk(OwnedChunk ownedchunk){
ARG plugin = My_Reference.get_my_ref();
String query = "SELECT LOWER(owner) AS owner,id_chunk,fire,pitstone,redstone,explode,door,store,access,name,text FROM chunk WHERE world='" + ownedchunk.world.toLowerCase() +"' AND x='" + ownedchunk.chunk_x + "' AND y='" + ownedchunk.chunk_y + "';";
ResultSet owner_result = plugin.sqlHandler.sqlQuery(query);
try {
if (owner_result != null && owner_result.next()) {
owner = owner_result.getString("owner");
name = owner_result.getString("name");
text = owner_result.getString("text");
id_chunk = owner_result.getInt("id_chunk");
fire = owner_result.getInt("fire");
pitstone = owner_result.getInt("pitstone");
redstone = owner_result.getInt("redstone");
explode = owner_result.getInt("explode");
door = owner_result.getInt("door");
store = owner_result.getInt("store");
access = owner_result.getInt("access");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}

 

You should avoid using caps for method's first letter. Keep them for classes, it's a universal convention. Apart from that, the only thing I can tbink of is a sql error (maybe time out?) but I don't see how it would create this error... Bad luck!

 

First I thin database lost connection but I have in plugin other methods with loading data from DB and it's working.
And I try stop mysql server and it's produce other type of error.

if error come on start i know I doing something wrong but plugin working good ... first few hours (now running 2:30 normali)