# Apm missing error span

**URL:** <https://discuss.elastic.co/t/apm-missing-error-span/292367>\
**Category:** APM\
**Tags:** dotnet\
**Created:** [December 18, 2021, 1:57am UTC](https://discuss.elastic.co/t/apm-missing-error-span/292367 "2021-12-18T01:57:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wajika](https://avatars.discourse-cdn.com/v4/letter/w/977dab/32.png) [@wajika](https://discuss.elastic.co/u/wajika)\
**Post date:** [December 18, 2021, 1:57am UTC](https://discuss.elastic.co/t/apm-missing-error-span/292367/1 "2021-12-18T01:57:18Z")

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I saw an http500 error on the transaction page, but I didn’t see it on the error page. Why?

elastic stack ver：7.12.0

![pic](https://us1.discourse-cdn.com/elastic/original/3X/a/2/a269d114e0c343032c1a1ed83e0813b8bdbcff3e.gif)

We just initialized the apm in the code without customizing any apm features.

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**Author:** ![wajika](https://avatars.discourse-cdn.com/v4/letter/w/977dab/32.png) [@wajika](https://discuss.elastic.co/u/wajika)\
**Post date:** [December 20, 2021, 6:42am UTC](https://discuss.elastic.co/t/apm-missing-error-span/292367/2 "2021-12-20T06:42:10Z")

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I found that the cluster has a mapper\_parsing\_exception error, which has been fixed now.

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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:** [January 10, 2022, 2:42am UTC](https://discuss.elastic.co/t/apm-missing-error-span/292367/3 "2022-01-10T02:42:58Z")

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