# Intermittent pt-table-checksum Issuing rollback() due to DESTROY without explicit disconnect()

**URL:** <https://forums.percona.com/t/intermittent-pt-table-checksum-issuing-rollback-due-to-destroy-without-explicit-disconnect/22467>\
**Category:** Percona Toolkit\
**Created:** [June 1, 2023, 8:35am UTC](https://forums.percona.com/t/intermittent-pt-table-checksum-issuing-rollback-due-to-destroy-without-explicit-disconnect/22467 "2023-06-01T08:35:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Reio\_Remma](https://avatars.discourse-cdn.com/v4/letter/r/919ad9/32.png) [@Reio\_Remma](https://forums.percona.com/u/Reio_Remma)\
**Post date:** [June 1, 2023, 8:35am UTC](https://forums.percona.com/t/intermittent-pt-table-checksum-issuing-rollback-due-to-destroy-without-explicit-disconnect/22467/1 "2023-06-01T08:35:34Z")

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A few months ago I started getting intermittent errors from pt-table-checksum.

```auto
pt-table-checksum --nocheck-binlog-format --quiet

Starting checksum ...

Issuing rollback() due to DESTROY without explicit disconnect() of DBD::mysql::db handle ;host=localhost;mysql_read_default_group=client at /usr/bin/pt-table-checksum line 5566.
06-01T11:17:43 Error checksumming table schema.table: DBD::mysql::st execute failed: Server has gone away [for Statement "SHOW MASTER STATUS"] at /usr/bin/pt-table-checksum line 5566.

            TS ERRORS DIFFS ROWS DIFF_ROWS CHUNKS SKIPPED TIME TABLE
06-01T11:17:43 1 0 52 0 1 0 0.060 schema.table

```

This is happening with MySQL 8.0.33 and Pecona Toolkit 3.5.2.

The MySQL server hasn’t actually gone away. The server and pt-table-checksum are running in the same host.

Any ideas as to what might be causing this?

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**Author:** ![Matthew\_Lenz](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthew_lenz/32/1299_2.png) [@Matthew\_Lenz](https://forums.percona.com/u/Matthew_Lenz)\
**Post date:** [October 7, 2023, 1:02pm UTC](https://forums.percona.com/t/intermittent-pt-table-checksum-issuing-rollback-due-to-destroy-without-explicit-disconnect/22467/2 "2023-10-07T13:02:06Z")

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Just started happening for me today as well but I upgraded everything a couple weeks ago from a 8.0.2x to 8.0.33. I see .34 is out now so maybe it’s a known bug.

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**Author:** ![hackeryutu](https://avatars.discourse-cdn.com/v4/letter/h/9f8e36/32.png) [@hackeryutu](https://forums.percona.com/u/hackeryutu)\
**Post date:** [March 22, 2024, 8:35am UTC](https://forums.percona.com/t/intermittent-pt-table-checksum-issuing-rollback-due-to-destroy-without-explicit-disconnect/22467/3 "2024-03-22T08:35:53Z")

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Just started happening for me today as well