我正在使用Debian服务器,Tomcat 7和Java 1.7。这是一个接收多个TCP连接的应用程序,每个TCP连接都是Java进程打开的文件。
查看
在
查看
/proc/java pid/fd
,有时候发现打开的文件数超过1024,当这种情况发生时,在日志中会出现堆栈跟踪_SocketException: Too many open files_
关于此错误的所有信息,人们都提到了ulimit,我已经更改了这个设置,但错误仍然会发生。以下是配置:在
/etc/security/limits.conf
中:root soft nofile 8192
root hard nofile 8192
在 /etc/sysctl.conf
中
fs.file-max = 300000
ulimit -a
命令返回以下信息:
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 16382
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 8192
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
但是,当我检查java进程的限制时,它只有1024个
在/proc/java进程的pid/limits
中。
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 32339 32339 processes
Max open files 1024 1024 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 32339 32339 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
如何增加Java进程的最大打开文件数
?