[Building Sakai] problem in large site: users disappearing

[Charles Hedrick]

We have a site with 20,000 members in it. Users report that at some point they lose access to the site.

Here’s what the event log looks like:

| 628208064 | 2014-02-28 15:14:08 | user.login          | NULL                                                    | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
| 628208065 | 2014-02-28 15:14:08 | pres.begin          | /presence/600c1140-3890-4274-00ca-dd17d37107ba-presence | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
| 628208877 | 2014-02-28 15:15:00 | melete.section.read | 600c1140-3890-4274-00ca-dd17d37107ba                    | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | 600c1140-3890-4274-00ca-dd17d37107ba |
| 628223145 | 2014-02-28 15:30:15 | pres.end            | /presence/600c1140-3890-4274-00ca-dd17d37107ba-presence | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
| 628227275 | 2014-02-28 15:35:11 | pres.begin          | /presence/!error-presence                               | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
| 628228431 | 2014-02-28 15:36:32 | pres.end            | /presence/!error-presence                               | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
| 628330876 | 2014-02-28 17:36:20 | user.logout         | NULL                                                    | 3ca6e3aa-e98e-4fe8-8b31-4ec0740c9ee4 | m          | NULL                                 |
+


They then tried to login again

| 628227481 | 2014-02-28 15:35:27 | user.login   | NULL                                                     | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |
| 628227482 | 2014-02-28 15:35:27 | pres.begin   | /presence/!error-presence                                | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |
| 628227593 | 2014-02-28 15:35:35 | pres.begin   | /presence/~231e9165-14db-41c2-800e-7b47838e431c-presence | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |
| 628227598 | 2014-02-28 15:35:35 | content.read | /content/public/PersonalWorkspace.html                   | ac8d0b27-313d-4d3b-944f-15cc515a746e | a          | NULL    |
| 628228430 | 2014-02-28 15:36:32 | pres.end     | /presence/!error-presence                                | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |
| 628228624 | 2014-02-28 15:36:47 | pres.end     | /presence/~231e9165-14db-41c2-800e-7b47838e431c-presence | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |
| 628330874 | 2014-02-28 17:36:20 | user.logout  | NULL                                                     | ac8d0b27-313d-4d3b-944f-15cc515a746e | m          | NULL    |

And again:

| 628228151 | 2014-02-28 15:36:11 | user.login  | NULL                      | 93b00b43-82a7-46f9-869a-d9bcd7420dc4 | m          | NULL    |
| 628228153 | 2014-02-28 15:36:11 | pres.begin  | /presence/!error-presence | 93b00b43-82a7-46f9-869a-d9bcd7420dc4 | m          | NULL    |
| 628229106 | 2014-02-28 15:37:17 | pres.end    | /presence/!error-presence | 93b00b43-82a7-46f9-869a-d9bcd7420dc4 | m          | NULL    |
| 628330871 | 2014-02-28 17:36:20 | user.logout | NULL                      | 93b00b43-82a7-46f9-869a-d9bcd7420dc4 | m          | NULL    |

catalina.out doesn’t show any errors. It looks to me like bad data in a cache.