我使用 custombuild 将 dovecot 更新到 2.2.22 版本。更新后服务器崩溃，必须从服务器重新启动。更新完成，但 dovecot 服务无法启动。
重启后，我无法登录任何电子邮件帐户，因此我查看了 dovecot 日志并发现了以下内容：
Apr 11 17:31:37 server dovecot[1435]: imap([email protected]): Error: Couldn't load required plugin /usr/lib/dovecot/lib11_imap_quota_plugin.so: dlopen() failed: /usr/lib/dovecot/lib11_imap_quota_plugin.so: file too short
Apr 11 17:31:37 server dovecot[1435]: imap([email protected]): Error: Internal error occurred. Refer to server log for more information.
我在服务器日志中找不到任何特定的错误（如果它指的是消息）。
目前，我已从 dovecot 配置中删除 imap_quota 插件，它仍可正常工作（但配额当然不起作用）。有人能帮我修复这个问题吗？
我正在运行 CentOS 6
编辑：“ls -l /usr/lib/dovecot/”的输出：
[root@server ~]# ls -l /usr/lib/dovecot/
total 50916
drwxr-xr-x. 2 root root 4096 Apr 11 15:55 auth
drwxr-xr-x. 2 root root 4096 Apr 11 15:55 doveadm
-rw-r--r--. 1 root root 868 Apr 11 15:54 dovecot-config
-rw-r--r-- 1 root root 1181086 Apr 11 15:55 lib01_acl_plugin.a
-rwxr-xr-x 1 root root 994 Apr 11 15:55 lib01_acl_plugin.la
-rwxr-xr-x 1 root root 552277 Apr 11 15:55 lib01_acl_plugin.so
-rw-r--r-- 1 root root 136948 Apr 11 15:55 lib02_imap_acl_plugin.a
-rwxr-xr-x 1 root root 1066 Apr 11 15:55 lib02_imap_acl_plugin.la
-rwxr-xr-x 1 root root 91748 Apr 11 15:55 lib02_imap_acl_plugin.so
-rw-r--r-- 1 root root 126956 Apr 11 15:55 lib02_lazy_expunge_plugin.a
-rwxr-xr-x 1 root root 1057 Apr 11 15:55 lib02_lazy_expunge_plugin.la
-rwxr-xr-x 1 root root 85652 Apr 11 15:55 lib02_lazy_expunge_plugin.so
-rw-r--r-- 1 root root 160916 Apr 11 15:55 lib05_pop3_migration_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib05_pop3_migration_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib05_pop3_migration_plugin.so
-rw-r--r-- 1 root root 93420 Apr 11 15:55 lib05_snarf_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib05_snarf_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib05_snarf_plugin.so
-rw-r--r-- 1 root root 85620 Apr 11 15:55 lib10_last_login_plugin.a
-rwxr-xr-x 1 root root 1043 Apr 11 15:55 lib10_last_login_plugin.la
-rwxr-xr-x 1 root root 57044 Apr 11 15:55 lib10_last_login_plugin.so
-rw-r--r-- 1 root root 133226 Apr 11 15:55 lib10_mail_filter_plugin.a
-rwxr-xr-x 1 root root 1050 Apr 11 15:55 lib10_mail_filter_plugin.la
-rwxr-xr-x 1 root root 85171 Apr 11 15:55 lib10_mail_filter_plugin.so
-rw-r--r-- 1 root root 965802 Apr 11 15:55 lib10_quota_plugin.a
-rwxr-xr-x 1 root root 1008 Apr 11 15:55 lib10_quota_plugin.la
-rwxr-xr-x 1 root root 473628 Apr 11 15:55 lib10_quota_plugin.so
-rw-r--r-- 1 root root 46968 Apr 11 15:55 lib11_imap_quota_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib11_imap_quota_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib11_imap_quota_plugin.so
-rw-r--r-- 1 root root 104898 Apr 11 15:55 lib11_trash_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib11_trash_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib11_trash_plugin.so
-rw-r--r-- 1 root root 137326 Apr 11 15:55 lib15_notify_plugin.a
-rwxr-xr-x 1 root root 1015 Apr 11 15:55 lib15_notify_plugin.la
-rwxr-xr-x 1 root root 88574 Apr 11 15:55 lib15_notify_plugin.so
-rw-r--r-- 1 root root 27414 Apr 11 15:55 lib20_autocreate_plugin.a
-rwxr-xr-x 1 root root 1043 Apr 11 15:55 lib20_autocreate_plugin.la
-rwxr-xr-x 1 root root 23038 Apr 11 15:55 lib20_autocreate_plugin.so
-rw-r--r-- 1 root root 129194 Apr 11 15:55 lib20_expire_plugin.a
-rwxr-xr-x 1 root root 1015 Apr 11 15:55 lib20_expire_plugin.la
-rwxr-xr-x 1 root root 85926 Apr 11 15:55 lib20_expire_plugin.so
-rw-r--r-- 1 root root 1305544 Apr 11 15:55 lib20_fts_plugin.a
-rwxr-xr-x 1 root root 994 Apr 11 15:55 lib20_fts_plugin.la
-rwxr-xr-x 1 root root 726452 Apr 11 15:55 lib20_fts_plugin.so
-rw-r--r-- 1 root root 31444 Apr 11 15:55 lib20_listescape_plugin.a
-rwxr-xr-x 1 root root 1043 Apr 11 15:55 lib20_listescape_plugin.la
-rwxr-xr-x 1 root root 23946 Apr 11 15:55 lib20_listescape_plugin.so
-rw-r--r-- 1 root root 112888 Apr 11 15:55 lib20_mailbox_alias_plugin.a
-rwxr-xr-x 1 root root 1064 Apr 11 15:55 lib20_mailbox_alias_plugin.la
-rwxr-xr-x 1 root root 75675 Apr 11 15:55 lib20_mailbox_alias_plugin.so
-rw-r--r-- 1 root root 108922 Apr 11 15:55 lib20_mail_log_plugin.a
-rwxr-xr-x 1 root root 1069 Apr 11 15:55 lib20_mail_log_plugin.la
-rwxr-xr-x 1 root root 73879 Apr 11 15:55 lib20_mail_log_plugin.so
-rw-r--r-- 1 root root 895296 Apr 11 15:55 lib20_push_notification_plugin.a
-rwxr-xr-x 1 root root 1132 Apr 11 15:55 lib20_push_notification_plugin.la
-rwxr-xr-x 1 root root 400667 Apr 11 15:55 lib20_push_notification_plugin.so
-rw-r--r-- 1 root root 89268 Apr 11 15:55 lib20_quota_clone_plugin.a
-rwxr-xr-x 1 root root 1050 Apr 11 15:55 lib20_quota_clone_plugin.la
-rwxr-xr-x 1 root root 59419 Apr 11 15:55 lib20_quota_clone_plugin.so
-rw-r--r-- 1 root root 97380 Apr 11 15:55 lib20_replication_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_replication_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_replication_plugin.so
-rw-r--r-- 1 root root 966668 Apr 11 15:55 lib20_virtual_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_virtual_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_virtual_plugin.so
-rw-r--r-- 1 root root 202898 Apr 11 15:55 lib20_zlib_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_zlib_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib20_zlib_plugin.so
-rw-r--r-- 1 root root 395314 Apr 11 15:55 lib21_fts_squat_plugin.a
-rwxr-xr-x 1 root root 1073 Apr 11 15:55 lib21_fts_squat_plugin.la
-rwxr-xr-x 1 root root 268310 Apr 11 15:55 lib21_fts_squat_plugin.so
-rw-r--r-- 1 root root 133856 Apr 11 15:55 lib30_imap_zlib_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib30_imap_zlib_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib30_imap_zlib_plugin.so
-rw-r--r-- 1 root root 289408 Apr 11 15:55 lib90_stats_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib90_stats_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib90_stats_plugin.so
-rw-r--r-- 1 root root 92344 Apr 11 15:55 lib95_imap_stats_plugin.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib95_imap_stats_plugin.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 lib95_imap_stats_plugin.so
-rw-r--r-- 1 root root 6998076 Apr 11 15:54 libdovecot.a
-rw-r--r-- 1 root root 91210 Apr 11 15:54 libdovecot-compression.a
-rwxr-xr-x 1 root root 1112 Apr 11 15:54 libdovecot-compression.la
lrwxrwxrwx 1 root root 31 Apr 11 15:54 libdovecot-compression.so -> libdovecot-compression.so.0.0.0
lrwxrwxrwx 1 root root 31 Apr 11 15:54 libdovecot-compression.so.0 -> libdovecot-compression.so.0.0.0
-rwxr-xr-x 1 root root 53256 Apr 11 15:54 libdovecot-compression.so.0.0.0
-rw-r--r-- 1 root root 1497266 Apr 11 15:55 libdovecot-dsync.a
-rwxr-xr-x 1 root root 1105 Apr 11 15:55 libdovecot-dsync.la
lrwxrwxrwx 1 root root 25 Apr 11 15:55 libdovecot-dsync.so -> libdovecot-dsync.so.0.0.0
lrwxrwxrwx 1 root root 25 Apr 11 15:55 libdovecot-dsync.so.0 -> libdovecot-dsync.so.0.0.0
-rwxr-xr-x 1 root root 803325 Apr 11 15:55 libdovecot-dsync.so.0.0.0
-rw-r--r-- 1 root root 348236 Apr 11 15:54 libdovecot-fts.a
-rwxr-xr-x 1 root root 1052 Apr 11 15:54 libdovecot-fts.la
lrwxrwxrwx 1 root root 23 Apr 11 15:54 libdovecot-fts.so -> libdovecot-fts.so.0.0.0
lrwxrwxrwx 1 root root 23 Apr 11 15:54 libdovecot-fts.so.0 -> libdovecot-fts.so.0.0.0
-rwxr-xr-x 1 root root 249030 Apr 11 15:54 libdovecot-fts.so.0.0.0
-rwxr-xr-x 1 root root 993 Apr 11 15:54 libdovecot.la
-rw-r--r-- 1 root root 260264 Apr 11 15:55 libdovecot-lda.a
-rwxr-xr-x 1 root root 1091 Apr 11 15:55 libdovecot-lda.la
lrwxrwxrwx 1 root root 23 Apr 11 15:55 libdovecot-lda.so -> libdovecot-lda.so.0.0.0
lrwxrwxrwx 1 root root 23 Apr 11 15:55 libdovecot-lda.so.0 -> libdovecot-lda.so.0.0.0
-rwxr-xr-x 1 root root 164433 Apr 11 15:55 libdovecot-lda.so.0.0.0
-rw-r--r-- 1 root root 665568 Apr 11 15:55 libdovecot-login.a
-rwxr-xr-x 1 root root 1081 Apr 11 15:55 libdovecot-login.la
lrwxrwxrwx 1 root root 25 Apr 11 15:55 libdovecot-login.so -> libdovecot-login.so.0.0.0
lrwxrwxrwx 1 root root 25 Apr 11 15:55 libdovecot-login.so.0 -> libdovecot-login.so.0.0.0
-rwxr-xr-x 1 root root 381322 Apr 11 15:55 libdovecot-login.so.0.0.0
lrwxrwxrwx 1 root root 19 Apr 11 15:54 libdovecot.so -> libdovecot.so.0.0.0
lrwxrwxrwx 1 root root 19 Apr 11 15:54 libdovecot.so.0 -> libdovecot.so.0.0.0
-rwxr-xr-x 1 root root 3680177 Apr 11 15:54 libdovecot.so.0.0.0
-rw-r--r-- 1 root root 156056 Apr 11 15:55 libdovecot-sql.a
-rwxr-xr-x 1 root root 1052 Apr 11 15:55 libdovecot-sql.la
lrwxrwxrwx 1 root root 23 Apr 11 15:55 libdovecot-sql.so -> libdovecot-sql.so.0.0.0
lrwxrwxrwx 1 root root 23 Apr 11 15:55 libdovecot-sql.so.0 -> libdovecot-sql.so.0.0.0
-rwxr-xr-x 1 root root 96051 Apr 11 15:55 libdovecot-sql.so.0.0.0
-rw-r--r-- 1 root root 16781016 Apr 11 15:55 libdovecot-storage.a
-rwxr-xr-x 1 root root 1080 Apr 11 15:55 libdovecot-storage.la
lrwxrwxrwx 1 root root 27 Apr 11 15:55 libdovecot-storage.so -> libdovecot-storage.so.0.0.0
lrwxrwxrwx 1 root root 27 Apr 11 15:55 libdovecot-storage.so.0 -> libdovecot-storage.so.0.0.0
-rwxr-xr-x 1 root root 7621008 Apr 11 15:55 libdovecot-storage.so.0.0.0
-rw-r--r-- 1 root root 44698 Apr 11 15:55 libfs_compress.a
-rwxr-xr-x 1 root root 0 Apr 11 15:55 libfs_compress.la
-rwxr-xr-x 1 root root 0 Apr 11 15:55 libfs_compress.so
-rw-r--r-- 1 root root 523552 Apr 11 15:54 libssl_iostream_openssl.a
-rwxr-xr-x 1 root root 1058 Apr 11 15:54 libssl_iostream_openssl.la
-rwxr-xr-x 1 root root 272891 Apr 11 15:54 libssl_iostream_openssl.so
drwxr-xr-x 2 root root 4096 Apr 11 15:55 stats