Event ID 41604 occurs stating indexing failed to fetch content due to timeout

Problem

This event can occur when using Enterprise Vault (EV) SMTP archiving and there are many MIME message being archived.  

Error Message

Log Name: Veritas Enterprise Vault
Source: Enterprise Vault
Date: 10/27/2020 3:40:53 AM
Event ID: 41604
Task Category: Index Volumes Processor
Level: Warning
Computer: EVSERVER.EV.LOCAL
Description:
Indexing failed to fetch item content from StorageCrawler due to timeout. ISN: '154567', SavesetID: '202010263746404~202010262103010000~Z~D01BCAF5DDE96B524923F21B5C5EF681'.

If this error occurs frequently, increase the value of 'Maximum item wait time' on the Advanced tab of the Enterprise Vault Indexing server properties in the Administration Console.

V-437-41604

Cause

This issue seems to occur when there is an increased amount of MIME messages being archived.  

Solution

Add the following DWORD registry values under the registry key HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\KVS\Enterprise Vault\Storage to every EV server, and then restart the EV Storage Service:

Warning: You must use these recommended values. Any other values will either be ineffective or cause problems with indexing backlogs.

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.