# Possible issue with tracking\_column\_type =\> "timestamp" in 8.1.1

**URL:** <https://discuss.elastic.co/t/possible-issue-with-tracking-column-type-timestamp-in-8-1-1/336255>\
**Category:** Logstash\
**Created:** [June 16, 2023, 6:56pm UTC](https://discuss.elastic.co/t/possible-issue-with-tracking-column-type-timestamp-in-8-1-1/336255 "2023-06-16T18:56:43Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![SrxDevOps](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/srxdevops/32/122382_2.png) [@SrxDevOps](https://discuss.elastic.co/u/SrxDevOps)\
**Post date:** [June 16, 2023, 6:56pm UTC](https://discuss.elastic.co/t/possible-issue-with-tracking-column-type-timestamp-in-8-1-1/336255/1 "2023-06-16T18:56:43Z")

</div>

After updating from 7x to 8.1.1 any pipeline that uses tracking\_column\_type =\> "timestamp" fails with the error

[2023-06-16T14:37:50,485][ERROR][logstash.javapipeline][Questions] Pipeline error {:pipeline\_id=\>"Questions", :exception=\>#\<Psych::DisallowedClass: Tried to load unspecified class: Time

tracking\_column\_type =\> "numeric" still works as expected in the existing pipelines.

Is anyone else experiencing these errors?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 16, 2023, 8:18pm UTC](https://discuss.elastic.co/t/possible-issue-with-tracking-column-type-timestamp-in-8-1-1/336255/2 "2023-06-16T20:18:17Z")

</div>

I think that [this](https://github.com/logstash-plugins/logstash-integration-jdbc/commit/c06e3192d8da3528bf4fc045b3fd8721b60a5a1e) PR (committed yesterday) is intended to fix that. Specifically "Ruby 3.1 comes with Psych 4 which switched the alias of load from unsafe\_load to safe\_load".

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 15, 2023, 2:11am UTC](https://discuss.elastic.co/t/possible-issue-with-tracking-column-type-timestamp-in-8-1-1/336255/4 "2023-07-15T02:11:40Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.