I've reproduced it locally, although it is not deterministic and may require some patience.
Steps to reproduce
- Set up a fresh installation of Crowd 2.7.0, connected to a database (I'm using Postgres 9.1, although there are customer reporting problems with MySQL and SQL Server as well).
- Once the set up is completed, log in as 'admin'.
- Reload (Cmd-R or similar) the home page repeatedly. Do not wait for it to refresh completely in your browser, just reload as fast as you can.
Observed outcome
Eventually, the page does not refresh anymore. Crowd freezes.
Using the Postgres admin tools, we find that there is a client that is locking the cwd_token table, see attached image.
WORKAROUND
At this point the workaround is to switch the session storage to in-memory from database storage:
Session Configuration
The in-memory storage is explained in more detail on the page linked above.
If you cannot keep crowd up long enough to access the Administration console, or crowd will simply not finish starting up, follow these steps to modify the value directly in the database:
- Shutdown crowd - ensure the pid is stopped
- Perform a database backup
- Connect to the database
- Execute this sql:
update cwd_property set property_value='false' where property_name='database.token.storage.enabled';
- Restart Crowd
- Validate the session storage is now in-memory by Navigating to Administration > Session Config
- is duplicated by
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CWD-3697 Crowd token storage in database causing Crowd to hang
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CWDDEV-151 Failed to load
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Page Loading...
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[CWD-3692] Crowd freezes under heavy load
| Remote Link | Original: This issue links to "Wiki Page (Atlassian Documentation)" [ 51878 ] |
| Workflow | Original: Simplified Crowd Development Workflow v2 - restricted [ 1511203 ] | New: JAC Bug Workflow v3 [ 3365364 ] |
| Status | Original: Resolved [ 5 ] | New: Closed [ 6 ] |
| Workflow | Original: Simplified Crowd Development Workflow v2 [ 1393633 ] | New: Simplified Crowd Development Workflow v2 - restricted [ 1511203 ] |
| Workflow | Original: Crowd Development Workflow v2 [ 577290 ] | New: Simplified Crowd Development Workflow v2 [ 1393633 ] |
| Remote Link | New: This issue links to "Page (Extranet)" [ 139163 ] |
| Remote Link | New: This issue links to "Page (Extranet)" [ 94231 ] |
| Remote Link | Original: This issue links to "Page (Extranet)" [ 56914 ] | New: This issue links to "Page (Extranet)" [ 56914 ] |
| Remote Link | Original: This issue links to "Page (Extranet)" [ 56914 ] | New: This issue links to "Page (Extranet)" [ 56914 ] |
| Remote Link | New: This issue links to "ADM-50903 (Atlassian JIRA Extranet - Special Projects)" [ 58452 ] |
dberrueta The problem exists even with Crowd >=3.1.1, we have the problem with one of our clients recently and has caused a production downtime of 1.5h.