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Question

Seeing a Lot of Warnings in Application Log on WebLink Server

WebLink Version 9
Updated November 7, 2017
asked on April 13, 2015

We recently upgraded to WebLink 9 and are now seeing a lot of events being recorded in the Application Log. Below are the details of the warnings:

Log Name:      Application
Source:        Laserfiche WebLink 9
Date:          4/13/2015 8:14:10 AM
Event ID:      0
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      xxxx.d91.k12.id.us
Description:
There was an error clearing the image cache directories: Object reference not set to an instance of an object.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Laserfiche WebLink 9" />
    <EventID Qualifiers="0">0</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-04-13T14:14:10.000000000Z" />
    <EventRecordID>3001030</EventRecordID>
    <Channel>Application</Channel>
    <Computer>xxxx.d91.k12.id.us</Computer>
    <Security />
  </System>
  <EventData>
    <Data>There was an error clearing the image cache directories: Object reference not set to an instance of an object.</Data>
  </EventData>
</Event>


Log Name:      Application
Source:        Laserfiche WebLink 9
Date:          4/13/2015 8:14:10 AM
Event ID:      0
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      xxxx.d91.k12.id.us
Description:
There was an error clearing the PDF cache directories: Object reference not set to an instance of an object.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Laserfiche WebLink 9" />
    <EventID Qualifiers="0">0</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-04-13T14:14:10.000000000Z" />
    <EventRecordID>3001029</EventRecordID>
    <Channel>Application</Channel>
    <Computer>xxxx.d91.k12.id.us</Computer>
    <Security />
  </System>
  <EventData>
    <Data>There was an error clearing the PDF cache directories: Object reference not set to an instance of an object.</Data>
  </EventData>
</Event>

Any idea on how to correct this?

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Answer

SELECTED ANSWER
replied on April 13, 2015 • Show version history

It's configured in the WebLink Administrator's Utility. There are default settings for it as well as virtual directory specific settings which can override the default settings.

Try changing the path to another location and see if there's still an error. Make sure it's a path that the user configured as the application pool identity has full rights to.

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Replies

replied on April 13, 2015

What are the paths for the image and PDF cache directories? Does the application pool user have rights to that location? Do the errors still occur if you change the paths?

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View 4 previous replies
replied on April 13, 2015

I do not know what the paths are for the cache directories. How would I find that out?

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replied on April 13, 2015

I found where it is set at in the WebLink Administrator and they are both currently set to "<Temporary Directory for: ApplicationPoolIdentity>" which is the default.

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SELECTED ANSWER
replied on April 13, 2015 • Show version history

It's configured in the WebLink Administrator's Utility. There are default settings for it as well as virtual directory specific settings which can override the default settings.

Try changing the path to another location and see if there's still an error. Make sure it's a path that the user configured as the application pool identity has full rights to.

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replied on April 13, 2015

The application pool identity is set to the built in account of "ApplicationPoolIdentity". I do not see it in the list of available users to assign rights to when changing the rights of a folder. Do I just use the IUSR account?

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replied on April 13, 2015

Please review this site for information about application pool identities. Make sure you set the location to be the web server. The object name would be

IIS AppPool\WebLinkAppPool

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replied on April 13, 2015

I have made the change and will update after some time to see if the problem persists. Do I need to restart IIS or anything?

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replied on April 13, 2015

No, an iisreset isn't necessary. After you change the cache directory paths and save the change, it should take effect immediately.

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replied on January 22, 2016

We too are running into this issue on a recent upgrade to 9 SP1.  When I go through the WebLink admin to attempt to change the folder, I get a .NET framework error where it tells me about an invalid character in my selection.  Since I'm using the Browse button I know it's not something I've typed in.  The path names don't have any special characters either - just text.

 

Any ideas?

 

Shawn

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replied on November 7, 2017

Shawn,


Did you ever get a solution to your issue?  If so, please share!

 

Thank you,


Jon

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replied on November 7, 2017

Hi Jon,

I did not get a solution.  It still happens and it also occasionally crashes the W3WP process to the point where on login you see the notice about debugging the crashed process.

 

We're in the process of switching to a different application for displaying our public documents to replace WebLink so it's become less of an issue for us at this time.

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replied on November 7, 2017

Hi Shawn,

 

Thank you for your response!  Best of luck to you and your organization!

 

-Jon

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