[1.8.9] Log spam

[iarspider]

A lot of the following messages are logged (~80 MB in 3 hrs)

[20:12:08] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
    at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_25]
    at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_25]
    at net.minecraft.util.Util.func_181617_a(SourceFile:45) [g.class:?]
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1014) [ave.class:?]
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:349) [ave.class:?]
    at net.minecraft.client.main.Main.main(SourceFile:124) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
    at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310) [NewLaunch.jar:?]
    at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:395) [NewLaunch.jar:?]
    at org.multimc.EntryPoint.listen(EntryPoint.java:170) [NewLaunch.jar:?]
    at org.multimc.EntryPoint.main(EntryPoint.java:54) [NewLaunch.jar:?]
Caused by: java.lang.NullPointerException
    at exter.foundry.network.MessageTileEntitySync$SyncRunnable.run(MessageTileEntitySync.java:43) ~[MessageTileEntitySync$SyncRunnable.class:?]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_25]
    at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_25]
    at net.minecraft.util.Util.func_181617_a(SourceFile:44) ~[g.class:?]
    ... 17 more

Foundry 1.4.0.0
Forge 1724