java - The udp server throws OOM exception when feed data in a high rate -

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in order recieve maximum 64kb of data , reduce packets loss, config udp server following netty 4.0

public class udpserver {      public void run()         throws exception {         eventloopgroup group = new nioeventloopgroup();         try {             bootstrap b = new bootstrap();             b.group( group ).channel( niodatagramchannel.class ).option( channeloption.so_broadcast, true )                 .option( channeloption.udp_receive_packet_size, 1024 * 64 )                 .option( channeloption.so_rcvbuf, 1024 * 1024 * 100 ).handler( new userhandler() );              b.bind( 5141 ).sync().channel().closefuture().await();         }         {             group.shutdowngracefully();         }     }      public static void main( string[] args )         throws exception {         new udpserver().run();     } }

when feed data in 20kmsg/s udp sercer, throws oom exception. found cause config param udp_receive_packet_size larger direct buffer memory ran out quickly. if set 1024*128 so_rcvbuf, 1024 * 2 udp_receive_packet_size, server works when feed data in 20kmsg/s.

are there suggestion avoid oom excepiton when udp_receive_packet_size not change?

thanks help/insight

was bug , fixed in latest master , part of netty 4.0.0.final.

see http://github.com/netty/netty/issues/1388


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