We're running Enterprise Vault 2007 SP1 on Windows Server 2003 SP1 and we've discovered that since our server is under heavy load with huge amounts of emails to journal it appears that the EVConvertorSandbox.exe tasks aren't releasing their CPU time when the default 10mins timeout occurs.
What this means is that the process gets stuck on one email that is either corrupt or just plain **bleep** large (attachment) and this causes the process to keep running on the single email thus in my case often 3 out of the 5 processes are bogged down on single emails leaving only 2 to do the work - which isn't enough thus the massive backlog of emails in the MSMQ J2 and Journaling mailbox.
The fix is to set the timeout value for the registry keys: ConversionTimeout and ConversionTimeoutArchiveFiles to something more reasonable like 5mins. Problem is that on version 2007 SP1 these keys now reside under HKLM\Software\KVS\EnterpriseVault and are of type REG_ZG where as they used be located under HKLM\Software\KVS\EnterpriseVault\Storage and were always of type DWORD.
I've tried creating them as is in the HKLM\Software\KVS\EnterpriseVault\Storage location but that doesn't seem to work. I've now requested that this be escalated to Engineering. If I get a solution I will post it here.