Hi, I have a very strange problem since a rather long time now and already tried everything I could think of but it still keeps coming up and up again. After rather long time frame some plugins suddenly loose their SQL Connection and start crashing one by one after each other. The thing is that they dont loose the SQL Connection all at the same time but over a long period like 2-10 hours and some never loose the connection. In the console I get this error: Code: 2012-12-25 11:11:26 [INFO] [mcMMO] Connection to MySQL was lost! Attempting to reconnect in 60 seconds... 2012-12-25 11:11:26 [INFO] caro336[/84.136.30.118:50486] logged in with entity id 21861237 at ([world] 77.5, 97.0, 256.5) 2012-12-25 11:11:26 [SEVERE] [RaidCraft] DelegatingConstructorAccessorImpl.java[45] Communications link failure The last packet successfully received from the server was 32,589,231 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago. 2012-12-25 11:11:26 [SEVERE] com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 32,589,231 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago. 2012-12-25 11:11:26 [SEVERE] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 2012-12-25 11:11:26 [SEVERE] at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.Util.handleNewInstance(Util.java:407) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3082) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2968) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3516) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2111) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2273) 2012-12-25 11:11:26 [SEVERE] at com.silthus.raidcraft.database.RCDatabase.executeQuery(RCDatabase.java:357) 2012-12-25 11:11:26 [SEVERE] at com.silthus.raidcraft.database.RCDatabase.executeQuery(RCDatabase.java:269) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.tables.Players.getPlayer(Players.java:98) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.tables.Players.exists(Players.java:58) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.data.PlayerConfig.exists(PlayerConfig.java:25) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.RCPlayer.load(RCPlayer.java:171) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.RCPlayer.<init>(RCPlayer.java:156) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.PlayerManager.getPlayer(PlayerManager.java:78) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.listeners.RCPlayerListener.onPlayerJoin(RCPlayerListener.java:34) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 2012-12-25 11:11:26 [SEVERE] at java.lang.reflect.Method.invoke(Method.java:601) 2012-12-25 11:11:26 [SEVERE] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) 2012-12-25 11:11:26 [SEVERE] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) 2012-12-25 11:11:26 [SEVERE] at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35) 2012-12-25 11:11:26 [SEVERE] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477) 2012-12-25 11:11:26 [SEVERE] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.PlayerList.c(PlayerList.java:156) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.PlayerList.a(PlayerList.java:95) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.PendingConnection.d(PendingConnection.java:130) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.PendingConnection.c(PendingConnection.java:45) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:44) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServerConnection.b(SourceFile:29) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:598) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:494) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:427) 2012-12-25 11:11:26 [SEVERE] at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849) 2012-12-25 11:11:26 [SEVERE] Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2529) 2012-12-25 11:11:26 [SEVERE] at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2979) 2012-12-25 11:11:26 [SEVERE] ... 36 more 2012-12-25 11:11:26 [SEVERE] [RaidCraft] Players.java[98] null 2012-12-25 11:11:26 [SEVERE] com.silthus.raidcraft.database.exceptions.MissingDataException 2012-12-25 11:11:26 [SEVERE] at com.silthus.raidcraft.database.RCDatabase.executeQuery(RCDatabase.java:361) 2012-12-25 11:11:26 [SEVERE] at com.silthus.raidcraft.database.RCDatabase.executeQuery(RCDatabase.java:269) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.tables.Players.getPlayer(Players.java:98) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.tables.Players.exists(Players.java:58) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.database.data.PlayerConfig.exists(PlayerConfig.java:25) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.RCPlayer.load(RCPlayer.java:171) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.RCPlayer.<init>(RCPlayer.java:156) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.PlayerManager.getPlayer(PlayerManager.java:78) 2012-12-25 11:11:26 [SEVERE] at com.silthus.rcskills.listeners.RCPlayerListener.onPlayerJoin(RCPlayerListener.java:34) 2012-12-25 11:11:26 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) I already tried the following but without success: Increase the allowed connections in the my.cnf to 4096 Add the autoReconnect=true parameter to the driver Made sure every plugin uses its own connection (some of my plugins had the same connection so I splitted them, that decreased the amount of plugins crashing at once) MySQL Version and Kernel: Code: [SIZE=13px][FONT=sans-serif][COLOR=#000000]Server version: 5.1.66-0+squeeze1[/COLOR][/FONT][/SIZE] [SIZE=13px][FONT=sans-serif][COLOR=#000000]MySQL client version: 5.1.63[/COLOR][/FONT][/SIZE] root@srvmc-main:~# uname -a Linux srvmc-main 2.6.32-16-pve #1 SMP Fri Nov 9 11:42:51 CET 2012 x86_64 GNU/Linux The SQL Server is bound to its local DMZ IP: 192.168.51.104 and not to localhost (for phpmyadmin access from the webserver). Has anyone any more ideas what I can try to fix this problem? Thanks in advance!
I can only be thinking of 2 possible solutions. 1. Is your MySQL database opened? Like literally, is the window opened?) 2. Is the port opened? The default port is 3306. Because I'm reading the errors you pasted from the console, and with it saying "Connection to MySQL was lost!", I could only think of connection troubleshooting issues. EDIT by Moderator: merged posts, please use the edit button instead of double posting.
MySQL is closing open connections after some time of inactivity. Put this in my.cnf and restart MySQL to disable this: Code: wait_timeout=604800 interactive_timeout=604800 This will set timeout to one week.
