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java.lang.OutOfMemoryError: Direct buffer memory at java.nio.Bits.reserveMemory(Bits.java:658)[na:1.7.0_80] at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)[na:1.7.0_80] at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306)[na:1.7.0_80] at io.netty.buffer.UnpooledUnsafeDirectByteBuf.allocateDirect(UnpooledUnsafeDirectByteBuf.java:108)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.buffer.UnpooledUnsafeDirectByteBuf.<init>(UnpooledUnsafeDirectByteBuf.java:69)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.buffer.UnpooledByteBufAllocator.newDirectBuffer(UnpooledByteBufAllocator.java:50)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:155)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:146)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:107)[netty-buffer-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.AdaptiveRecvByteBufAllocator$HandleImpl.allocate(AdaptiveRecvByteBufAllocator.java:104)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:117)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)[netty-transport-4.0.25.Final.jar:4.0.25.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)[netty-common-4.0.25.Final.jar:4.0.25.Final] at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)[netty-common-4.0.25.Final.jar:4.0.25.Final] at java.lang.Thread.run(Thread.java:745)[na:1.7.0_80]