'Cosmos Emulator randomly failing tests on Linux
I'm trying to run Cosmos Emulator on Linux, to run tests using SpecFlow.
After installing it following these instructions, and successfully running it, a variable number of tests randomly failed all the times I tried to run them.
The failed tests throw a CosmosException with a 503 (Service Unavailable) status code.
All these tests work just fine on Windows and, depending on how I run them, either via the terminal or VSCode, the number of failures differs.
Solution 1:[1]
The problem was with the docker command provided within the documentation:
docker run -p 8081:8081 -p 10251:10251 -p 10252:10252 -p 10253:10253 -p 10254:10254 -m 3g --cpus=2.0 --name=test-linux-emulator -e AZURE_COSMOS_EMULATOR_PARTITION_COUNT=10 -e AZURE_COSMOS_EMULATOR_ENABLE_DATA_PERSISTENCE=true -e AZURE_COSMOS_EMULATOR_IP_ADDRESS_OVERRIDE=$ipaddr -it mcr.microsoft.com/cosmosdb/linux/azure-cosmos-emulator
More specifically, with this environment variable:
AZURE_COSMOS_EMULATOR_PARTITION_COUNT=10
This partition count was too low, which caused it to drop requests. Increasing it to 20, as suggested in this Github thread, solved the issue.
I also increased the --cpus to 3.0 and the memory -m to 4g, just to be safe.
EDIT: Ended up having to increase to 40. It never broke again after that.
Sources
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Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 |