DataStax Academy FAQ

DataStax Academy migrated to a new learning management system (LMS) in July 2020. We are also moving to a new Cassandra Certification process so there are changes to exam bookings, voucher system and issuing of certificates.

Check out the Academy FAQ pages for answers to your questions:

question

jonasmartinpico_114991 avatar image
jonasmartinpico_114991 asked ·

How can we remove tombstones from system_auth.role_permissions?

Hi guys!

We have some app that has generated more than 100000 tombstones in the role_permissions table. WE have checked the gc_grace_seconds of that table, and we were so suprised to see that is 90 days by default. we tried to reduce that gc_grace_seconds to a low number in order to reomve the tombstones, but it seems that is impossible to alter that .. (our superuser has all kind of actions granted).

How could we remove the tombstones on this table? is it possible to reduce the gc_grace_seconds?

Regards!

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1 Answer

Erick Ramirez avatar image
Erick Ramirez answered ·

You didn't specify which version you're running but I assume that you are referring submitting lots of Spark apps, it indicates that you're running an older version of DSE.

This is a known issue that was fixed in DSE 6.0.10 and 6.7.5 (DSP-19393). There is a temporary workaround available that involves granting the Spark app user privileges before submitting apps (DSP-19098).

If you log a ticket with DataStax Support, one our engineers will be able to assist you with manually clearing the tombstones in the system_auth.role_permissions table. Cheers!

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