we have the same error here:
2007-08-13 06:38:31,200 ERROR [Pop3Server-870]
[name=XXXX@DOMAIN.com;ip=XXX.89.57.5;] MailboxIndex - Caught Exception
java.io.FileNotFoundException: /opt/zimbra/index/0/10/index/0/_aet.tis (Too many open files) in MailboxIndex.closeIndexWriter
It seems that Zimbra hangs up cca at the same time each day.
OS: Debian Linux, server: SunFire X4100M2, 4GB RAM, dual core amd opteron 2.4GHz, cca 250 e-mail accounts. Any idea what happens here?
Is there a command to regenerate all indexes (even if it takes a long time)? Maybe that would help, if it really is index related...