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https://issues.apache.org/jira/browse/CASSANDRA-15703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17297129#comment-17297129
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Berenguer Blasi commented on CASSANDRA-15703:
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This should repro it, as per one internal customer issue investigation, but
both current 3.11 and 4.0 succeed on bootstrapping the nodes
{noformat}
ccm create c15703
ccm populate -n 2
vi ~/.ccm/c15703/node1/resources/cassandra/conf/cassandra.yaml set
cdc_enabled=true, auto_boostrap=true
vi ~/.ccm/c15703/node2/resources/cassandra/conf/cassandra.yaml set
auto_boostrap=true, seeds=127.0.0.1
ccm node1 start
ccm node1 cqlsh
CREATE KEYSPACE test WITH REPLICATION = {'class' : 'SimpleStrategy',
'replication_factor' : 1};
CREATE TABLE test.foo (a int, b text, PRIMARY KEY(a)) WITH cdc=true;
insert into test.foo (a, b) values (1, 'test');
ccm node1 stop
vi ~/.ccm/c15703/node1/resources/cassandra/conf/cassandra.yaml set
cdc_enabled=false
ccm node1 start
ccm node2 start should fail
{noformat}
I can see in node2 logs how it does indeed bootstrap, there are no exceptions,
nodetool status shows the ring, describing the table has cdc=true, cdc in yaml
is false...
> When CDC is disabled bootstrapping breaks
> -----------------------------------------
>
> Key: CASSANDRA-15703
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15703
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Bootstrap and Decommission
> Reporter: T Jake Luciani
> Priority: Normal
> Fix For: 3.11.x
>
>
> Related to CASSANDRA-12697
> There is an edge case left over. If a cluster had enabled CDC on a table
> then subsequently set cdc=false, subsequent bootstraps break.
>
> This is because the cdc column is false on the existing nodes but null on the
> bootstrapping node, causing the schema sha to never match.
>
> There are a couple possible fixes:
> 1. Since 12697 was only about upgrades we can serialize the cdc column IFF
> the cluster nodes are all on the same version.
> 2. We can force cdc=false on all tables where it's null.
>
> I think #1 is probably simpler. #2 would probably cause more of the same
> problem if nodes are not all updated with the fix.
>
>
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