Multiple Errors in Event Log Event ID 7182 and 41315

[Ravi_Bhandari]

Recently I have noticed multiple Errors in the event log occurring every few minutes.

Event 7182 Web Application Index Search failed and Event 41315 Index Query Server A search failed with error "Value cannot be null. Parameter name: key"

I've run a verification on the Indexes for the users whose mailboxes this is effecting but this didn't highlight any problems.

Has anyone come across this before, are there any good articles for diagnosing the issue.

[AndrewB]

what version of EV? are you using DA or CA?

[Ravi_Bhandari]

Sorry I completely forgot to add that I am using EV 10.0.4 with hotfix 3. We are not using discovery accelerator. It is archiving mailboxes from Exchange 2013 running on windows 2012.

[Ravi_Bhandari]

I found a better description of the error, "Failed to search the index volume. (0XC0041C0E)"

[AndrewB]

this technote is similar to the error you're describing. maybe it helps get you in the right direction:

Searches failing with error "Input string was not in a correct format"

• Article: TECH172565
• Updated: August 1, 2014
• Article URL: http://www.symantec.com/docs/TECH172565

[VargheseR]

You can probably try and do a rebuild on the affected Index volume. For which you are getting an error.