NullPointer @     at io.netty.buffer.PoolChunk.initBufWithSubpage
out of nowhere...

Caused by: java.lang.NullPointerException
    at io.netty.buffer.PoolChunk.initBufWithSubpage(PoolChunk.java:381)
    at io.netty.buffer.PoolChunk.initBufWithSubpage(PoolChunk.java:369)
    at io.netty.buffer.PoolArena.allocate(PoolArena.java:194)
    at io.netty.buffer.PoolArena.allocate(PoolArena.java:132)
    at io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:262)
    at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:157)
    at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:148)
    at io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:101)
    at io.netty.handler.codec.MessageToByteEncoder.allocateBuffer(MessageToByteEncoder.java:140)
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:105)
    ... 39 more

netty 4.1 beta 6
