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https://issues.apache.org/jira/browse/CASSANDRA-16381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276742#comment-17276742
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Brandon Williams commented on CASSANDRA-16381:
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I added a simple removenode test
[here|https://github.com/driftx/cassandra-dtest/tree/CASSANDRA-16381] and a
patch that gets around the duplicate sources
[here|https://github.com/driftx/cassandra/tree/CASSANDRA-16381] which were
coming from system_traces (for some reason.) This works great... until you add
any user defined data, as stress does. This will cause streaming errors and
then the hosts involved in streaming will also lose network connectivity to
each other and begin dropping gossip syn messages.
The area of code to modify to make the replicas distinct comes from transient
replication, but the duplicates don't occur until CASSANDRA-15666. I'm not
really sure what's going on here, could you take a look, [~blerer]?
> nodetool removenode error “Conflicting replica added”
> -----------------------------------------------------
>
> Key: CASSANDRA-16381
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16381
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Bootstrap and Decommission
> Reporter: vincent royer
> Assignee: Brandon Williams
> Priority: Normal
> Fix For: 4.0-beta
>
>
> When testing elassandra on C* 4.0, integration tests with ccm systematically
> failed on removing a node with the following error “Conflicting replica
> added” . [This integration test
> |https://github.com/strapdata/elassandra/blob/v6.8.4-strapdata/integ-test/test-cleanup-repair.sh#L289]
> was ok with Elassandra based on Cassandra 3.11, and there is no changes in
> that test. Moreover, it seems there is no cassandra-test (dtest) for removing
> a node (there is only one removenode test for transient replication). The
> topology_test.py remove a node from the CCM cluster, but it does not call
> nodetool removenode.
> I wonder if we have a non-tested regression here in C 4.0 ?
> ++ ccm node1 nodetool status
> ++ awk ‘/127.0.0.3/ \{ print $7 }’
> + HOST_ID3=6d2e858f-dacc-4c7c-a626-14b45f6b3b94
> + ccm node3 stop
> + ccm node1 nodetool removenode 6d2e858f-dacc-4c7c-a626-14b45f6b3b94
> Traceback (most recent call last):
> File “/usr/local/bin/ccm”, line 4, in <module>
> __import__(‘pkg_resources’).run_script(‘ccm==3.1.6’, ‘ccm’)
> File
> “/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py”,
> line 742, in run_script
> self.require(requires)[0].run_script(script_name, ns)
> File
> “/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py”,
> line 1674, in run_script
> exec(script_code, namespace, namespace)
> File
> “/Library/Python/2.7/site-packages/ccm-3.1.6-py2.7.egg/EGG-INFO/scripts/ccm”,
> line 112, in <module> File
> “build/bdist.macosx-10.14-intel/egg/ccmlib/cmds/node_cmds.py”, line 233, in
> run
> File “build/bdist.macosx-10.14-intel/egg/ccmlib/node.py”, line 848, in
> nodetool
> File “build/bdist.macosx-10.14-intel/egg/ccmlib/node.py”, line 2131, in
> handle_external_tool_process
> ccmlib.node.ToolError: Subprocess [‘nodetool’, ‘-h’, ‘localhost’, ‘-p’,
> ‘7100’, ‘removenode’, ‘6d2e858f-dacc-4c7c-a626-14b45f6b3b94’] exited with
> non-zero status; exit status: 1;
> stdout: nodetool: Conflicting replica added (expected unique ranges):
> Full(/127.0.0.1:7000,(4949329179655327935,6135417578204142297]); existing:
> Full(/127.0.0.1:7000,(4949329179655327935,6135417578204142297])
> See ‘nodetool help’ or ‘nodetool help <command>’.++ finish
> ++ echo ‘ERROR occurs, test failed’
> ERROR occurs, test failed
> ++ ‘[’ ‘!’ -z ‘’ ‘]’
> ++ exit 1
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