Caused by: java.io.FileNotFoundException: /home/jboss/jboss-5.1.0.GA/server/default/deploy/card.war/WEB-INF/web.xml (Too many open files)
 at java.io.FileInputStream.open(Native Method)
 at java.io.FileInputStream.<init>(FileInputStream.java:120)
 at org.jboss.net.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:128)
 at org.jboss.virtual.plugins.context.AbstractURLHandler.openStream(AbstractURLHandler.java:203)
 at org.jboss.virtual.VirtualFile.openStream(VirtualFile.java:230)
 at org.jboss.virtual.VFSInputSource.getByteStream(VFSInputSource.java:66)
 ... 44 more

˜q™æ˜¯å› äØ“linux限制了打开文äšg的最大句柄数量ã€?/span>

linux默认的打开文äšg数量æ˜?024åQŒæˆ‘们可以用ulimit -a 来查看系¾lŸèµ„源，例如åQ?/span>

[root@redhat ~]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
pending signals                 (-i) 1024
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                   (-n) 1024 --打开最大文件数量限åˆ?/span>
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 16384
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

解决该问题的宗旨是：增大打开文äšg最大句柄限制数åQŒè¯¥æ•°æ˜¯1024çš„æ•´æ•°å€?/span>

1.临时增大open files的限制�/span>

  可以用ulimit -n 来äÍ时增大该限制å€û|¼Œä½†æ˜¯ä¸€æ—¦é‡å¯æœåŠ¡å™¨åŽï¼Œè¯¥å€¼åˆä¼šæ¢å¤åˆ°1024。只能暂时性的解决问题。命令如下：

[root@redhat ~]# ulimit -n 65536
[root@redhat ~]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
pending signals                 (-i) 1024
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65536
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 16384
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

2.å½Õdº•å¢žå¤§open files的限制å€?/span>

  一般情况下åQŒæˆ‘们都会通过修改¾pȝ»Ÿé™åˆ¶æ–‡äšg来彻底增大open files的倹{€?/span>

2.1 通过VI打开/etc/security/limits.confåQŒåœ¨“# End of file”上面æ·ÕdŠ å¦‚下åQ?/span>

    *  -  nofile  65536

    该语句表½Cºï¼šæ¯ä¸€ä¸ªç”¨æˆïLš„默认打开文äšg数是65536

2.2 通过VI打开/etc/sysctl.conf,在最后一行添加如下： 
  
     fs.file-max = 65536 
  
2.3 重启ssh服务
修改ssh server配置文äšgåQ?etc/ssh/sshd_config
UseLogin yes

重启ssh ç”?etc/init.d/sshd restart

此时再用ulimit -a来查看： 
[root@redhat ~]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
pending signals                 (-i) 1024
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65536
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 16384
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

åQˆå¦‚果还不行可以重启下服务器试试åQ?br />