Too many open files

今日发现产品后台报错:

java.net.SocketException: Too many open files
        at java.net.PlainSocketImpl.socketAccept(Ljava.net.SocketImpl;)V(Native Method)
        at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
        at java.net.ServerSocket.implAccept(ServerSocket.java:450)
        at java.net.ServerSocket.accept(ServerSocket.java:421)
        at org.apache.jk.common.ChannelSocket.accept(ChannelSocket.java:268)
        at org.apache.jk.common.ChannelSocket.acceptConnections(ChannelSocket.java:531)
        at org.apache.jk.common.SocketAcceptor.runIt(ChannelSocket.java:660)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
        at java.lang.Thread.run()V(Unknown Source)

经在BD上搜了一下给出以下处理办法:

查看open files 的大小

[root@web2 ~]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
max nice                        (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 69632
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
max rt priority                 (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 69632
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

 

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修改其大小:

[root@web2 ~]# ulimit -n 4096
[root@web2 ~]# ulimit -a    
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
max nice                        (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 69632
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 4096
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
max rt priority                 (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 69632
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited