Pistons crashing server

Below is a zip file with the logs from today and one notepad file in particular that has one of the crashes in it. I posted all of todays logs because the server kept going up and down so not sure which one would help the most but the lone notepad log I posted below definitely has the error in it. Server keeps crashing when player goes to his base that has a-lot of pistons at it. Basically any of our redstone machines that have a-lot of pistons crashes the server terribly. Our wither skeleton farm crashes the server (full of pistons). Seems like a pumpkin farm and or witch farm crashes it not sure which one though.

Copied from one of the logs:

[Server thread/ERROR]: Can't setBlockAndData(minecraft:piston_extension, 14) as it's an invalid block state. Defaulting to minecraft:piston_extension[facing=down,type=default] instead (data 0)
java.lang.IllegalArgumentException: Cannot set property ayl

{name=facing, clazz=class dt, values=[down, up, north, south, west, east]} to null on block minecraft:piston_extension, it is not an allowed value
at aya.a(SourceFile:131) ~[minecraft_server.jar:?]
at axs.a(SourceFile:194) ~[minecraft_server.jar:?]
at ayv.a(SourceFile:618) [minecraft_server.jar:?]
at alu.d(SourceFile:287) [minecraft_server.jar:?]
at axn.a(SourceFile:367) [minecraft_server.jar:?]
at axn.a(SourceFile:191) [minecraft_server.jar:?]
at ou.a(SourceFile:812) [minecraft_server.jar:?]
at ou.ah(SourceFile:800) [minecraft_server.jar:?]
at ou.c(SourceFile:194) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.w(SourceFile:570) [minecraft_server.jar:?]
at nt.w(SourceFile:284) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.v(SourceFile:506) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:422) [minecraft_server.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_05]
[13:51:46] [Server thread/ERROR]: Can't setBlockAndData(minecraft:piston_extension, 14) as it's an invalid block state. Defaulting to minecraft:piston_extension[facing=down,type=default] instead (data 0)
java.lang.IllegalArgumentException: Cannot set property ayl{name=facing, clazz=class dt, values=[down, up, north, south, west, east]}

to null on block minecraft:piston_extension, it is not an allowed value
at aya.a(SourceFile:131) ~[minecraft_server.jar:?]
at axs.a(SourceFile:194) ~[minecraft_server.jar:?]
at ayv.a(SourceFile:618) [minecraft_server.jar:?]
at alu.d(SourceFile:287) [minecraft_server.jar:?]
at axn.a(SourceFile:367) [minecraft_server.jar:?]
at axn.a(SourceFile:191) [minecraft_server.jar:?]
at ou.a(SourceFile:812) [minecraft_server.jar:?]
at ou.ah(SourceFile:800) [minecraft_server.jar:?]
at ou.c(SourceFile:194) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.w(SourceFile:570) [minecraft_server.jar:?]
at nt.w(SourceFile:284) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.v(SourceFile:506) [minecraft_server.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:422) [minecraft_server.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_05]
[13:51:47] [Server thread/ERROR]: Can't setBlockAndData(minecraft:piston_extension, 14) as it's an invalid block state. Defaulting to minecraft:piston_extension[facing=down,type=default] instead (data 0)