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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2020/12/16 11:33:41 UTC
[GitHub] [airflow] RafayAK opened a new issue #13102: Too many workers being created on ARM platform
RafayAK opened a new issue #13102:
URL: https://github.com/apache/airflow/issues/13102
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**Apache Airflow version**:
1.10.13
**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
**Environment**:
- **Cloud provider or hardware configuration**:
Running on Nvidia Jetson Xavier (ARMv8)
- **OS** (e.g. from /etc/os-release):
Ubuntu 18.04.5 LTS
- **Kernel** (e.g. `uname -a`):
`4.9.140-tegra #1 SMP PREEMPT Thu Jun 25 21:22:12 PDT 2020 aarch64 aarch64 aarch64 GNU/Linux`
- **Install tools**:
`- pip install apache-airflow --use-feature=2020-resolver`
- **Others**:
Running in a virtual pip environment
**What happened**:
I am seeing very weird behavior when it comes to the number of worker threads created on my Jetson Xavier ARM platform. Airflow webserver should create a default of 4 workers but for some reason, **_it's creating 24 worker processes_**!
Following are the results from running `airflow webserver -p 8586`
webserver logs show only 4 workers are created:
Running `airflow webserver -p 8586 -w 1` still **_creates 8 worker processes_**:
even though, the webserver logs show only 1 worker is created
<!-- (please include exact error messages if you can) -->
**What you expected to happen**:
Running Airflow on an x86 platform I don't see this behavior:
Here's the result of running `airflow webserver -p 8586`:
Here's the result of running `airflow webserver -p 8586` on x86
<!-- What do you think went wrong? -->
Some default value is being overridden on ARM
**How to reproduce it**:
Run on ARM platform
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**Anything else we need to know**:
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[GitHub] [airflow] RafayAK commented on issue #13102: Too many workers being created on ARM platform (Nvidia Jetson Xavier)
Posted by GitBox <gi...@apache.org>.
RafayAK commented on issue #13102:
URL: https://github.com/apache/airflow/issues/13102#issuecomment-747905108
Any idea where I should look to resolve this issue?
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[GitHub] [airflow] potiuk closed issue #13102: Too many workers being created on ARM platform (Nvidia Jetson Xavier)
Posted by GitBox <gi...@apache.org>.
potiuk closed issue #13102:
URL: https://github.com/apache/airflow/issues/13102
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[GitHub] [airflow] potiuk commented on issue #13102: Too many workers being created on ARM platform (Nvidia Jetson Xavier)
Posted by GitBox <gi...@apache.org>.
potiuk commented on issue #13102:
URL: https://github.com/apache/airflow/issues/13102#issuecomment-748021760
I believe it's just htop showing threads as processes on Arm. You can start investigating here - there are some options on disabling/enabling user threads: https://unix.stackexchange.com/questions/10362/why-does-htop-show-more-process-than-ps - and you can compare it with what `ps` displays. I would love to hear when you investigate more @RafayAK. I close it for now as invalid but if you find that this is not the case and have some more findings, please comment here.
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[GitHub] [airflow] boring-cyborg[bot] commented on issue #13102: Too many workers being created on ARM platform
Posted by GitBox <gi...@apache.org>.
boring-cyborg[bot] commented on issue #13102:
URL: https://github.com/apache/airflow/issues/13102#issuecomment-746148994
Thanks for opening your first issue here! Be sure to follow the issue template!
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