Dovecot不工作

Question

我有个服务器。下面我给出的服务器信息。

Linux host.com 2.6.32-531.29.2.lve1.3.11.1.el6.x86_64 #1 SMP Thu Dec 18 06:49:17 EST 2014 x86_64 x86_64 x86_64 GNU/Linux

当我试图重新启动Dovecot，IMAP和POP时。它失败了，并显示出以下错误。

Jul 23 01:30:41 platinum dovecot: imap-login: Fatal: master: service(imap-login): child 747903 returned error 127
Jul 23 01:30:41 platinum dovecot: pop3-login: Fatal: master: service(pop3-login): child 747902 returned error 127
Jul 23 01:30:40 platinum dovecot: master: Error: service(imap-login): command startup failed, throttling for 2 secs
Jul 23 01:30:40 platinum dovecot: master: Error: service(pop3-login): command startup failed, throttling for 2 secs
Jul 23 01:30:39 platinum dovecot: master: Warning: /selinux is no longer mounted. See http://wiki2.dovecot.org/Mountpoints

我读过一些手册，试图忽略这个挂载文件。然而，它仍然不起作用。我可以知道如何解决这个问题吗？

手动重新启动后，下面是日志

Jul 23 02:19:43 platinum dovecot: master: Error: service(imap-login): command startup failed, throttling for 2 secs
Jul 23 02:19:44 platinum dovecot: pop3-login: Fatal: master: service(pop3-login): child 805429 returned error 127
Jul 23 02:19:44 platinum dovecot: imap-login: Fatal: master: service(imap-login): child 805430 returned error 127
Jul 23 02:20:11 platinum dovecot: imap-login: Error: dovecot/imap-login: error while loading shared libraries: librt.so.1: failed to map segment from shared object: Cannot allocate memory
Jul 23 02:20:11 platinum dovecot: imap-login: Error: dovecot/imap-login: error while loading shared libraries: librt.so.1: failed to map segment from shared object: Cannot allocate memory
Jul 23 02:20:11 platinum dovecot: imap-login: Fatal: master: service(imap-login): child 806007 returned error 127
Jul 23 02:20:11 platinum dovecot: master: Error: service(imap-login): command startup failed, throttling for 4 secs
Jul 23 02:21:24 platinum dovecot: imap-login: Error: dovecot/imap-login: error while loading shared libraries: librt.so.1: failed to map segment from shared object: Cannot allocate memory
Jul 23 02:21:24 platinum dovecot: master: Error: service(imap-login): command startup failed, throttling for 8 secs
Jul 23 02:21:24 platinum dovecot: imap-login: Fatal: master: service(imap-login): child 807199 returned error 127

即使从下面的解决方案中，我也得到了同样的错误。最新情况：

Jul 23 02:42:08 platinum dovecot: master: Error: service(imap-login): command startup failed, throttling for 2 secs
Jul 23 02:42:08 platinum dovecot: master: Error: service(pop3-login): command startup failed, throttling for 2 secs
Jul 23 02:42:05 platinum dovecot: master: Warning: /selinux is no longer mounted. See http://wiki2.dovecot.org/Mountpoints
Jul 23 02:42:05 platinum dovecot: master: Warning: /var/named/chroot/etc/named.conf is no longer mounted. See http://wiki2.dovecot.org/Mountpoints
Jul 23 02:42:05 platinum dovecot: master: Warning: /var/named/chroot/var/named is no longer mounted. See http://wiki2.dovecot.org/Mountpoints

在取消安装/selinux之后，我发现了以下错误。

Jul 23 03:00:45 platinum dovecot: pop3-login: Fatal: master: service(pop3-login): child 847454 returned error 127
Jul 23 03:00:45 platinum dovecot: imap-login: Fatal: master: service(imap-login): child 847450 returned error 127
Jul 23 03:00:45 platinum dovecot: pop3-login: Fatal: master: service(pop3-login): child 847449 returned error 127
Jul 23 03:00:45 platinum dovecot: pop3-login: Error: dovecot/pop3-login: error while loading shared libraries: librt.so.1: failed to map segment from shared object: Cannot allocate memory
Jul 23 03:00:45 platinum dovecot: pop3-login: Error: dovecot/pop3-login: error while loading shared libraries: librt.so.1: failed to map segment from shared object: Cannot allocate memory

Answer 1

根据您提供的信息，我假设您很可能正在运行RHEL 6或CentOS 6。

也许您应该尝试先手动启动dovecot服务，然后再发布日志。

-最新情况

好的。这些步骤应该可以解决问题。

1. 使用命令vi /etc/dovecot.conf编辑文件
2. 找到有login_process_size的行
3. 取消注释并将其修改为login_process_size = 64
4. 保存文件并使用service dovecot stop和service dovecot start启动服务

我从这里找到了这个解决方案。

Answer 2

你能发布doveconf -n输出吗？

另外，如果你看到：

Jul 23 01:30:39 platinum dovecot: master: Warning: /selinux is no longer mounted. See http://wiki2.dovecot.org/Mountpoints

您应该使用doveadm mount list列出所有分区(由dovecot使用的分区应该有！))和doveadm mount remove /selinux。也许能解决你的问题。