Project configuation edit and new project not accessable

General Discussion
1

On the configuration pojects page, I time out whenever I try to create or edit a project. I was able to, after several attempts to create a project but have not been able to access any of the project edit pages or create another project since, I always time out. I am then provided with this message:

Internal error
Return to home page

The return to home page is a link to the home page where I can try again, and again, and again…

The Console tells me this:

10:19:44 AM PageAccessSynchronizer Thread ‘http-8088-3’ failed to acquire lock to page with id ‘19’, attempted for 1 minute out of allowed 1 minute. The thread that holds the lock has name ‘http-8088-28’.
(I) 10:18:51 AM LocalDBManagerImpl Created auto-backup of internal database “settings” in 4 seconds
(I) 10:18:51 AM ENGINE Successfully backed up instance ‘settings’ to ‘C:\Program Files\Inductive Automation\Ignition\data\db\autobackup\db_20130819_101846.tar.gz’
(I) 10:18:47 AM ENGINE Initiating backup of instance ‘settings’
(I) 10:18:47 AM ENGINE checkpointClose end
(I) 10:18:46 AM ENGINE dataFileCache commit start
(I) 10:18:46 AM ENGINE checkpointClose start
(I) 10:18:46 AM LocalDBManagerImpl Creating auto-backup of internal database “settings”…
10:18:44 AM DefaultExceptionMapper Unexpected error occurred
org.apache.wicket.page.CouldNotLockPageException: Could not lock page 19. Attempt lasted 1 minute

What would be the fix for this issue?

2

Can you get a thread dump from either the console> threads tab or the GCU and attach it here?

You may have to restart the gateway to ‘fix’ this. What version are you on?

3

Here’s the thread dump, and the software version:

System Properties
Context State Running
Redundancy Mode Independent
Redundancy State Active
Version 7.6.2 (b2368)
Java Version Sun Microsystems Inc. 1.6.0_24
CPU % 7.1
Memory (used/max) 751 mb / 1,018 mb
Uptime 23 days, 23 hours, 31 minutes, 24 seconds
Timezone America/Los_Angeles [GMT-8:00]
Locale en_US
Java Library Path ./lib;lib\core\gateway

4

How many projects do you have?

5

We have 14 projects, Of the 14 several are duplicates of others for testing purposes and several are simply learning "Sandboxes’

6

Hmm. This might be related to a bug on pages that deal with projects that got introduced in 7.6…

It should show up in 7.6.3-rc4 when it gets released.

In the meantime you will probably have to restart your gateway to get things back to normal.

7

Reboot worked, hopefully we won’t have to do this on any type of a regular basis. Production holds their breath when they lose control of their process even for a short period of time.

Thanks for the help

8

I think this was fixed in Ignition 7.6.3 rc2 or rc3.

9

Was this fixed in the 7.6.3.2013090513 release? I didn’t see it in the changelog.

10

It was fixed in one of the 7.6.3 RC releases, but it was not put in the changelog - woops.