thinkphp3.1缓存失败

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这分明是连接 mysql 失败

重新启动ubuntu就可以了

检查一下错误日志看看

应该是你的mysql服务 停止了，或者是被另外的程序占用了。

mysql 错误日志信息

140807  9:44:59 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.140807  9:44:59 [Note] Plugin 'FEDERATED' is disabled.140807  9:44:59 InnoDB: The InnoDB memory heap is disabled140807  9:44:59 InnoDB: Mutexes and rw_locks use GCC atomic builtins140807  9:44:59 InnoDB: Compressed tables use zlib 1.2.3.4140807  9:44:59 InnoDB: Initializing buffer pool, size = 128.0M140807  9:44:59 InnoDB: Completed initialization of buffer pool140807  9:44:59 InnoDB: highest supported file format is Barracuda.140807  9:44:59  InnoDB: Waiting for the background threads to start140807  9:40:10 InnoDB: 5.5.38 started; log sequence number 2477014140807  9:40:10 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306140807  9:40:10 [Note]   - '127.0.0.1' resolves to '127.0.0.1';140807  9:40:10 [Note] Server socket created on IP: '127.0.0.1'.140807  9:40:10 [Note] Event Scheduler: Loaded 0 events140807  9:40:10 [Note] /usr/sbin/mysqld: ready for connections.Version: '5.5.38-0ubuntu0.12.04.1'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu)

应该是你的mysql服务 停止了，或者是被另外的程序占用了。

Apache错误日志

[Thu Aug 07 09:44:29 2014] [warn] child process 1331 still did not exit, sending a SIGTERM[Thu Aug 07 09:44:29 2014] [warn] child process 2069 still did not exit, sending a SIGTERM[Thu Aug 07 09:44:29 2014] [warn] child process 2070 still did not exit, sending a SIGTERM[Thu Aug 07 09:44:31 2014] [notice] caught SIGTERM, shutting down[Thu Aug 07 09:44:59 2014] [notice] Apache/2.2.22 (Ubuntu) PHP/5.3.10-1ubuntu3.13 with Suhosin-Patch configured -- resuming normal operations[Thu Aug 07 09:45:59 2014] [error] [client 116.22.142.9] File does not exist: /var/www/dx/default, referer: http://218.20.201.217/index/system2.html[Thu Aug 07 09:46:00 2014] [error] [client 116.22.142.9] File does not exist: /var/www/dx/default, referer: http://218.20.201.217/index/system2.html[Thu Aug 07 09:46:08 2014] [error] [client 116.22.142.9] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 40961 bytes) in /var/www/dx/Library/Common/common.php on line 684, referer: http://218.20.201.217/index/system2.html[Thu Aug 07 09:46:22 2014] [error] [client 116.22.142.9] File does not exist: /var/www/dx/default, referer: http://218.20.201.217/index/system2.html[Thu Aug 07 09:51:37 2014] [error] [client 116.22.142.9] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 40961 bytes) in /var/www/dx/Library/Common/common.php on line 684, referer: http://218.20.201.217/index/system2.html[Thu Aug 07 09:51:48 2014] [error] [client 116.22.142.9] File does not exist: /var/www/dx/default, referer: http://218.20.201.217/index/system2.html

难道是传说中的假死。

应该是你的mysql服务 停止了，或者是被另外的程序占用了。

mysql 重新安装，最好的解决办法

内存不够了

找到原因了，查到磁盘被 mysql-bin.00001文件删除占用的很大的空间 ，删除掉这些文件，重启mysql出现这种情况，再删除mysql-bin.index重启一下就没事了