[jira] [Created] (CASSANDRA-12296) system_auth can't be rebuilt by default

["Jim Witschey (JIRA)" <ji...@apache.org>]

Jim Witschey created CASSANDRA-12296:
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             Summary: system_auth can't be rebuilt by default
                 Key: CASSANDRA-12296
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12296
             Project: Cassandra
          Issue Type: Bug
            Reporter: Jim Witschey


This came up in discussion of CASSANDRA-11687. {{nodetool rebuild}} was failing in a dtest. [~pauloricardomg] explained:

bq. before [CASSANDRA-11848] the local node could be considered a source, while now sources are restricted only to dc2, so since {{system_auth}} uses {{SimpleStrategy}} depending on the token arrangement there could or not be sources from dc2. Fix is to either use {{-Dcassandra.consistent.rangemovement=false}} or update {{system_auth}} to use {{NetworkTopologyStrategy}} with 2 dcs..

This is, at the very least, a UX bug. When {{rebuild}} fails, it fails with

{code}
nodetool: Unable to find sufficient sources for streaming range (-3287869951390391138,-1624006824486474209] in keyspace system_auth with RF=1.If you want to ignore this, consider using system property -Dcassandra.consistent.rangemovement=false.
{code}

which suggests that a user should give up consistency guarantees when it's not necessary.



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