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