When multiple accesses to the same Box occurred, 500 Errors occurred

[SawamiWataru]

When multiple accesses to the same Box occurred, 500 Errors occurred.

PR500-DV-0002: Dav system inconsistency detected.

[SawamiWataru]

Personium behavior

• Failed to get .pmeta file
• .pmeta file is generated the first time you execute the API targeted under Box after Box creation
• .pmeta file is created under the Box directory after creating it
• If the Box directory exists, obtain the .pmeta file under it

Cause

The phenomenon is reproduced when executing API which accesses under Box at the same time after creating Box.

Assume that API to be executed concurrently is [API-1] [API-2]. A phenomenon occurs when the following processing order is reached.

1. [API-1] Determine presence / absence of Box directory (Box directory does not exist)
2. [API-1] Create Box directory
3. [API-2] Determine presence / absence of Box directory (Box directory exists)
4. [API-2] Obtain .pmeta file (error occurred because .pmeta file does not exist)
5. [API-1] Create .pmeta file

[hideakikondo]

Solved in v1.5.2