打开的文件太多(ulimit已更改) [英] Too many open files ( ulimit already changed )
问题描述
我正在使用tomcat 7和Java 1.7的Debian服务器上工作.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.
看着/proc/pid of java/fd，我发现有时打开的文件数超过1024，这种情况发生时，我在catalina.out日志中找到了堆栈跟踪_SocketException: Too many open files_
我发现的有关此错误的所有内容，人们都提到了ulimit，我已经更改了此内容，并且该错误不断发生.这是配置:
在/etc/security/limits.conf
root soft nofile 8192
root hard nofile 8192
在/etc/sysctl.conf
fs.file-max = 300000
ulimit -a命令返回:
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/pid of java/limits
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
如何为Java进程增加Max open files的数量?
我只是将ulimit -n 8192行放在catalina.sh内，所以当我执行catalina start时，java将以上面指定的限制运行.
I'm working on a debian server with tomcat 7 and java 1.7. This is an application that recieves several TCP connections, each TCP connection is an open file by the java process.
Looking at /proc/pid of java/fd I found that, sometimes, the number of open files exceeds 1024, when this happens, I find in catalina.out log the stacktrace _SocketException: Too many open files_
Everything I find about this error, people refer to the ulimit, I have already changed this thing and the error keeps happening. Here is the config:
at /etc/security/limits.conf
root soft nofile 8192
root hard nofile 8192
at /etc/sysctl.conf
fs.file-max = 300000
the ulimit -a command returns:
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
But, when I check the limits of the java process, it's only 1024
at /proc/pid of java/limits
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
How can I increase the number of Max open files for the java process?
I just put the line ulimit -n 8192 inside the catalina.sh, so when I do the catalina start, java runs with the specified limit above.
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