# APM 6.6 release, python flask agent are stuck at startup

**URL:** <https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285>\
**Category:** APM\
**Created:** [January 30, 2019, 7:26am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285 "2019-01-30T07:26:34Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![oldcodeoberyn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/oldcodeoberyn/32/24800_2.png) [@oldcodeoberyn](https://discuss.elastic.co/u/oldcodeoberyn)\
**Post date:** [January 30, 2019, 7:26am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/1 "2019-01-30T07:26:34Z")

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After I upgrade the agent from 4.0.3 to 4.1.0, I can't start the app which use APM python agent.  
It is stuck after the log print:

base\_metrics.py[line:63] DEBUG Starting metrics collect timer

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/7/6/76e7f14da55323659cc91f95c7d2da3275191762.png)

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**Author:** ![oldcodeoberyn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/oldcodeoberyn/32/24800_2.png) [@oldcodeoberyn](https://discuss.elastic.co/u/oldcodeoberyn)\
**Post date:** [January 30, 2019, 7:47am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/2 "2019-01-30T07:47:35Z")

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seems it keeping on running in following function

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/1/d/1de1d112ba877710247865adf598142a2ba324fe.png)

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**Author:** ![beniwohli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/beniwohli/32/21256_2.png) [@beniwohli](https://discuss.elastic.co/u/beniwohli)\
**Post date:** [January 30, 2019, 8:17am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/3 "2019-01-30T08:17:19Z")

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Hi @oldcodeoberyn

Thanks for reporting this! It looks like there might be an issue with logging the warning that `psutil` isn't installed (assuming you haven't installed it). Can you try and install `psutil` and see if the problem goes away? Also, if you configured your logging setup, that configuration might also be helpful in resolving this.

Cheers  
Beni

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<div class="post-metadata">

**Author:** ![oldcodeoberyn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/oldcodeoberyn/32/24800_2.png) [@oldcodeoberyn](https://discuss.elastic.co/u/oldcodeoberyn)\
**Post date:** [January 30, 2019, 8:27am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/4 "2019-01-30T08:27:31Z")

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I already installed psutil. I don't know what do you mean 'configured your logging setup', I have logger configuration

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/e/a/ea989d2777733a13b42197bdd48df100f1da4626.png)

I trace the code in debug mode, it do find the psutil, **it just keep on running in function `def transform(value, stack=None, context=None):`**

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/1/5/15e403c94ba5222c1cc654065c6d78c9787acf29.png)

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<div class="post-metadata">

**Author:** ![beniwohli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/beniwohli/32/21256_2.png) [@beniwohli](https://discuss.elastic.co/u/beniwohli)\
**Post date:** [February 1, 2019, 3:07pm UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/5 "2019-02-01T15:07:45Z")

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Hi @oldcodeoberyn

I'm still investigating this, but so far haven't managed to reproduce it. In the meantime, you could try one of the following options to disable metrics until we can figure out a fix:

```auto
app.config["ELASTIC_APM"] = {
    # ...
    "METRICS_INTERVAL": "0s",
    # or
    "METRICS_SETS": [],
}

```

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 22, 2019, 11:07am UTC](https://discuss.elastic.co/t/apm-6-6-release-python-flask-agent-are-stuck-at-startup/166285/6 "2019-02-22T11:07:47Z")

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