run_av（ClamAV-clamd）和ClamAV-clamd av-scanner FAILED – 意外

扫描电子邮件时出现一个奇怪的错误。

Sep 17 15:13:26 mail amavis[616]: (00616-02) (!)run_av (ClamAV-clamd) FAILED - unexpected , output="/var/lib/amavis/tmp/amavis-20140917T141903-00616-Vqttx7KO/parts: lstat() failed: Permission denied. ERROR\n" Sep 17 15:13:26 mail amavis[616]: (00616-02) (!)ClamAV-clamd av-scanner FAILED: CODE(0xf8fde0) unexpected , output="/var/lib/amavis/tmp/amavis-20140917T141903-00616-Vqttx7KO/parts: lstat() failed: Permission denied. ERROR\n" at (eval 113) line 899. Sep 17 15:13:26 mail amavis[616]: (00616-02) (!)WARN: all primary virus scanners failed, considering backups 

我给clamav集团添加了amavis，反之亦然，但我认为它不是诀窍。 有人可以帮忙吗？

请评论，所以我添加必要的信息。

 AllowSupplementaryGroups true