记一次 解决PHP Linux服务器报 打开文件数过多的异常

2021-07-27更新：

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今天又遇到这个异常了，前端站点打不开，抛出同样的异常错误。查看连接数，只有8465个（最大连接数设置的是40960）。为了恢复网站，暂时先重启httpd服务。

service httpd start 启动
service httpd restart 重新启动
service httpd stop 停止服务

重启后，连接数降到5001个。网上找到个统计某个进程的所有打开的文件数和明细，下次出问题时，执行这个命令查看下。

#!/bin/bash
if [ $# -eq 0 ]
  then
    echo "No PID specified"
    echo "Run command with PID, for example:"
    echo "lsof-script.sh 12345"
    exit 2
fi

JAVA_PROCESS_PID=$1

lsof -p $JAVA_PROCESS_PID > lsof-output-$JAVA_PROCESS_PID.txt

echo "Files open by the process:"
cat lsof-output-$JAVA_PROCESS_PID.txt |  wc -l

echo "Generated output file with counts of grouped open files lsof-sorted-counts-$JAVA_PROCESS_PID.txt"
cat lsof-output-$JAVA_PROCESS_PID.txt | awk '{print $9}' | sed -e "s/\(^.*\)\(segmentstore\).*$/\1\2/" |  sed -e "s/\(^.*\)\(repository[/]index\).*$/\1\2/" | sed -e "s/\(^.*\)\(felix[/]bundle\).*$/\1\2/" |  sed -e "s/\(^.*\)\([/]lib\).*$/\1\2/" |  sed -e "s/\(^.*\)\([/]logs\).*$/\1\2/" |  sed -e "s/\(^.*\)\([/]ext\).*$/\1\2/" | sort | uniq -c | sort -rn -k1 > lsof-sorted-counts-$JAVA_PROCESS_PID.txt

echo "Total open files in OS:"
lsof | wc -l

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