Changes between Version 6 and Version 10 of Ticket #2034
- Timestamp:
- 2013-09-20T19:36:33Z (11 years ago)
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Ticket #2034
- Property Keywords blocks-release added
- Property Milestone changed from to 1.11.0
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Ticket #2034 – Description
v6 v10 1 When the number of servers used in a grid is greater than or equal to N + k, there is a race condition when mutable files are updated. While waiting for responses, ServermapUpdater will hit a threshold after EPSILON servers do not have any shares (currently EPSILON = k). This causes the process to finish and reject any remaining responses.1 When the number of servers used in a grid is greater than or equal to N + k, there is a race condition when mutable files are updated. While waiting for responses, !ServermapUpdater will hit a threshold after EPSILON servers do not have any shares (currently EPSILON = k). This causes the process to finish and reject any remaining responses. 2 2 3 However, this can occur before the ServermapUpdater has added the server to the servermap, causing the client to reject the server's response. Since the server is not added to the servermap, a writer for that server is not created. This causes a key error when the updater attempts to retrieve the corresponding writer for each share.3 However, this can occur before the !ServermapUpdater has added the server to the servermap, causing the client to reject the server's response. Since the server is not added to the servermap, a writer for that server is not created. This causes a key error when the updater attempts to retrieve the corresponding writer for each share. 4 4 5 5 This race condition can be replicated by setting the number of servers for allmydata.test.test_mutable.Update to 13.
