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Jeff Jirsa commented on CASSANDRA-12296: ---------------------------------------- [~KurtG] - If you're running NTS with only one replica, the patch will advise you to consider {{NetworkTopologyStrategy}}. Further, {{SimpleStrategy}} with a higher RF would also be adequate to find a second replica for streaming - the datastax docs recommending {{NetworkTopologyStrategy}} before {{nodetool rebuild}} are specifically referencing adding a new DC. The error message above is not limited to ONLY adding a new DC, and could be hit in a number of other ways, where the recommendation to switch to NTS isn't necessary. I agree the message is difficult to understand now, but "please switch to NTS" isn't the right fix here, either. > 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 > Priority: Minor > Labels: lhf > Attachments: 12296.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)