Details
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Bug
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Resolution: Fixed
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Test Blocker
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6.5.0
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6.5.0-3666
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Untriaged
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No
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KV-Engine Mad-Hatter Beta
Description
Steps to reproduce
1. Create a 2 node cluster - Both KV nodes
Rebalance Overview
+----------------+----------+--------------+
|
| Nodes | Services | Status |
|
+----------------+----------+--------------+
|
| 172.23.105.155 | [u'kv'] | Cluster node |
|
| 172.23.105.159 | None | <--- IN --- |
|
+----------------+----------+--------------+
|
2. Create a default bucket with replica=1
3. Create 50000 docs with durability=Majority
Bucket statistics
+---------+---------+----------+-----+-------+------------+-----------+-----------+
|
| Bucket | Type | Replicas | TTL | Items | RAM Quota | RAM Used | Disk Used |
|
+---------+---------+----------+-----+-------+------------+-----------+-----------+
|
| default | membase | 1 | 0 | 50000 | 4477419520 | 117879312 | 315611691 |
|
+---------+---------+----------+-----+-------+------------+-----------+-----------+
|
4. Rebalance In 2 new nodes and in parallel start another load of new 50k docs with durability=majority.
Rebalance Overview
+----------------+----------+--------------+
|
| Nodes | Services | Status |
|
+----------------+----------+--------------+
|
| 172.23.105.155 | [u'kv'] | Cluster node |
|
| 172.23.105.159 | [u'kv'] | Cluster node |
|
| 172.23.105.205 | None | <--- IN --- |
|
| 172.23.105.206 | None | <--- IN --- |
|
+----------------+----------+--------------+
|
NOTE: As soon as the rebalance starts we see a lot of com.couchbase.client.core.error.DurabilityImpossibleException for the cruds
5. Rebalance fails
Rebalance exited with reason {mover_crashed,
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{unexpected_exit,
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{'EXIT',<0.16126.1>,
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{{{{{child_interrupted,
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{'EXIT',<24878.11788.0>,socket_closed}},
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[{dcp_replicator,spawn_and_wait,1,
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[{file,"src/dcp_replicator.erl"},
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{line,249}]},
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{dcp_replicator,handle_call,3,
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[{file,"src/dcp_replicator.erl"},
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{line,127}]},
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{gen_server,try_handle_call,4,
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[{file,"gen_server.erl"},{line,636}]},
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{gen_server,handle_msg,6,
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[{file,"gen_server.erl"},{line,665}]},
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{proc_lib,init_p_do_apply,3,
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[{file,"proc_lib.erl"},{line,247}]}]},
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{gen_server,call,
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[<24878.11786.0>,get_partitions,
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infinity]}},
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{gen_server,call,
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['dcp_replication_manager-default',
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{get_replicator_pid,833},
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infinity]}},
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{gen_server,call,
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[{'janitor_agent-default',
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'ns_1@172.23.105.205'},
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{if_rebalance,<0.7760.0>,
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{dcp_takeover,'ns_1@172.23.105.159',834}},
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infinity]}}}}}.
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Rebalance Operation Id = a02e72f645b01801f0013d88a6f15ea6
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This defect may be similar to https://issues.couchbase.com/browse/MB-34832
