Michael Semb Wever created CASSANDRA-21767:
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Summary: Accord: first read of untouched key times out
Key: CASSANDRA-21767
URL: https://issues.apache.org/jira/browse/CASSANDRA-21767
Project: Apache Cassandra
Issue Type: Bug
Components: Accord
Reporter: Michael Semb Wever
On a new cluster I have seen null dereferences of the value returned by
{{SafeCommandStore.get(RoutingKey)}}, at two call sites:
* {{SafeCommandStore.updateManagedCommandsForKey:521}}, invoking
{{SafeCommandsForKey.callback}}.
* {{Commands.setDurable:1384}}, invoking {{SafeCommandsForKey.setDurable}}
through {{InformDurable}}.
{{AbstractSafeCommandStore.canExecute()}} used a non-null reference as proof
that a key was ready. Incremental Cassandra tasks retain references for keys
outside their current initialised batch. Those references pass the presence
check but {{SafeCommandStore.get(key)}} returns {{null}}.
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