linux非root用户文件描述符限制

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描述

在一次生产环境下切换非root用户，导致如下错误等待：

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[root@xy_Tomcat_1 exam-service]# su - java
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable

通常上述问题发现是由于非root用户默认打开文件描述符为1024：

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cat /etc/security/limits.d/90-nproc.conf

# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

*          soft    nproc     1024
root       soft    nproc     unlimited

解决

只要把非root用户值改为合适本身环境即可