bmccandless 5ec66c5b0e Avoid race condition in the matrix cache handling. (#1280) ...

* Improved fix for matrix cache handling.

During the MatrixDataCacheItem acquire function there was a
time when the write lock was released and the read lock was taken.
During that time, the dataset could have been deleted, later
result in the MatrixDataCacheManageri data adaptor returning None.

The solution is to demote the writer lock to a reader lock instead
of unlocking and relocking.

Also, when a the cache needs to delete an entry, the delete
is done outside the MatrixDataCacheManager lock.   This operation
only requires the write lock for the MatrixDataCacheItem.

Fixes #1255

2020-03-24 12:23:47 -07:00

..

web

server refactor (#1140)

2020-02-19 10:22:35 -08:00

__init__.py

server refactor (#1140)

2020-02-19 10:22:35 -08:00

annotations.py

tighten up error reporting (#1269)

2020-03-22 09:55:47 -07:00

app_config.py

Avoid race condition in the matrix cache handling. (#1280)

2020-03-24 12:23:47 -07:00

constants.py

server refactor (#1140)

2020-02-19 10:22:35 -08:00

data_locator.py

Use DataLocator consistently on backend (#1208)

2020-03-10 19:12:49 -07:00

default_config.py

Avoid race condition in the matrix cache handling. (#1280)

2020-03-24 12:23:47 -07:00

errors.py

Introduce a config file to cellxgene (#1264)

2020-03-22 09:34:11 -07:00

health.py

fix health root exception (#1283)

2020-03-23 15:13:32 -07:00

rest.py

tighten up error reporting (#1269)

2020-03-22 09:55:47 -07:00

utils.py

Add user-generated annotations tests to the server (#1164)

2020-02-23 15:32:13 -08:00