用户登陆不了fatal setresuid 502 Resource temporarily unavailable

现象：**
用户登陆失败，查看日志 /var/log/secure ，发现
Dec 25 08:38:01 BNLDEV1LGSZKPLV01 sshd[23547]: pam_unix(sshd:session): session opened for user sysadmin by (uid=0)
Dec 25 08:43:46 BNLDEV1LGSZKPLV01 sshd[23547]: pam_unix(sshd:session): session closed for user sysadmin
Dec 25 08:53:40 BNLDEV1LGSZKPLV01 sshd[23614]: Accepted password for appadmin from 10.6.227.6 port 12667 ssh2
Dec 25 08:53:41 BNLDEV1LGSZKPLV01 sshd[23614]: pam_unix(sshd:session): session opened for user appadmin by (uid=0)
Dec 25 08:53:41 BNLDEV1LGSZKPLV01 sshd[23618]: fatal: setresuid 502: Resource temporarily unavailable
Dec 25 08:53:41 BNLDEV1LGSZKPLV01 sshd[23614]: pam_unix(sshd:session): session closed for user appadmin
问题解决：**

 pam_tally2 --user appadmin
 ps -U appadmin | wc -l
 lsof | grep appadmin | wc –l

此问题一般 是资源限制引起的，加大进程数限制和文件句柄 限制 即可解决

 vi /etc/security/limits.conf

增加 以下配置：

 appadmin soft nproc 51200
 appadmin hard nproc 51200
 appadmin soft nofile 51200
 appadmin hard nofile 51200