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DMacy
#1 Posted : Wednesday, May 26, 2021 5:21:57 PM
Rank: Advanced Member

Groups: Registered

Joined: 9/1/2010
Posts: 116
I am retrieving a document from an index by its uri. Sometimes I get an exception about running two simultaneous operations on the index. If I wait a minute and try again, it usually works. What do I need to do to avoid this error?

The line of code I'm using is:

Dim TestDoc As Keyoti.SearchEngine.Documents.Document = LibIndex.GetDocument(New Uri("https://domain.com/la1234"))

I anticipate putting this code in a loop where I want to examine one document after another, deciding whether to update it or not.
Jim
#2 Posted : Wednesday, May 26, 2021 9:27:09 PM
Rank: Advanced Member

Groups: Administrators, Registered

Joined: 8/13/2004
Posts: 2,627
Location: Canada
The simultaneous operations exception happens when you try to create a DocumentIndex object while the index directory is locked (has a lock file in it).

So that might happen for example if you have two threads that create DocumentIndex, or 2 totally different processes that are doing this.

Another way is if you do this

i = New DocumentIndex(c)
'....
i = New DocumentIndex(c)

without calling DocumentIndex.Close, eg. you would fix that like

i = New DocumentIndex(c)
'....
i.Close()
i = New DocumentIndex(c)

-your feedback is helpful to other users, thank you!


DMacy
#3 Posted : Wednesday, May 26, 2021 10:07:32 PM
Rank: Advanced Member

Groups: Registered

Joined: 9/1/2010
Posts: 116
Thanks, Jim! I just needed to add LibIndex.Close at the end and it worked. I had forgotten that detail. Thanks for your help!
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