I use Hbase0.94 and CDH4. There are 25729 tcp connections in one machine,example: hadoop@apayhbs081 ~ $ netstat -a | wc -l 25729
The linux configration is : soft core 0 hard rss 10000 hard nproc 20 soft nproc 20 hard nproc 50 hard nproc 0 maxlogins 4 nproc 20480 nofile 204800 When there are 25729 tcp connections in one machine, the datanode is very slow. How can I resolve the question?