Paulo Motta created CASSANDRA-21057:
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Summary: Disk usage guardrail cannot be disabled when failure
threshold is reached
Key: CASSANDRA-21057
URL: https://issues.apache.org/jira/browse/CASSANDRA-21057
Project: Apache Cassandra
Issue Type: Bug
Components: Feature/Guardrails
Reporter: Paulo Motta
When the max allowed disk usage is reached, the node stop accepting writes. In
case the operator wants to disable the guardrail so the node start accepting
writes again, it is not able to do so by attempting to unset the warning and
failure thresholds to null at runtime:
{code}
nodetool-all setguardrailsconfig data_disk_usage_percentage_threshold null null
{code}
The reason for this is because the node does not stop advertising it's {{FULL}}
via gossip. We should set the state to {{SPACIOUS}} when the guardrail is
disabled at runtime.
A workaround for this is to set the data_disk_usage_max_disk_size to a very
high value:
{code}
nodetool-all setguardrailsconfig data_disk_usage_max_disk_size 10000GiB # set
to a very large value
{code}
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