Not all 16384 slots covered by lifecycle Plugin execution not covered You Are All Excellen 16384 slots group by all nodes are not consistent. Disks are not visibl err //all ALL all All all ALL all ALL ALL Redis redis ERR Not all 16384 slots are covered by nodes ERR Not all 16384 slots are covered by nodes. Dec 04, 2019 In a minimal Redis Cluster made up of three master nodes, each with a single slave node (to allow minimal failover), each master node is assigned a hash slot range between 0 and 16,383. Node A contains hash slots from 0 to 5000, node B from 5001 to 10000, node C from 10001 to 16383. OK All 16384 slots covered. But when I look into the cluster, they have not formed the cluster at all. And also observe that there are few slots which 7008 port is holding from the cluster which is running.
We are not able to use the
redis-trib fix command to fix a cluster when the master and slave for a particular set of slots both go down at the same time.
ERR Not all 16384 slots are covered by nodes. Fixing slots coverage. List of not covered slots: 5460 Slot 5460 has keys in 0 nodes: The folowing uncovered slots have no keys across the cluster: 5460 Fix these slots by covering with a random node? (type 'yes' to accept): yes Covering slot 5460 with 192.168.56.160:7002 再次check. The command only works if all the specified slots are already associated with some node. The command fails if the same slot is specified multiple times. As a side effect of the command execution, the node may go into down state because not all hash slots are covered.
redis 3.2.11
redis-cli 4.0.1 redis-trib (redis 3.3.3 gem)
Our use case is we are writing a redis cluster orchestrator, where nodes are added and removed often. When a node goes down, we want slots to be covered as quickly as possible by other masters in the cluster. Also, we are only using redis as a cache right now, so we don't necessarily care that assigning slots to the another master results in data loss.
Steps to reproduce
Result:
Not All 16384 Slots Are Covered By Nodes Locatedredis-trib check shows missing slots message (as expected):
What is the recommended way to recover in this situation? Both
rebalance and fix do not work for us. Should we be using addslots to manually assign slots to other masters?
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Redis Cluster Not All 16384 Slots Are Covered By Nodes
Result of rebalance:
Rebalance is not allowed to run until we fix the cluster. Not All 16384 Slots Are Covered By Nodes Free
Output of rebalance:
Fix distributes slots to both master and slave IPs (which surprised us, as we thought it would only use masters). After fix completes, the nodes don't agree about configuration, and gossip does not correct the disagreement, which is an even worse situation for the cluster. The issue is easy for us to reproduce.
Err Not All 16384 Slots Are Covered By Nodes
Is there an issue with
fix , or is it not correct to attempt to use it in our use case where it is possible that slots will be lost because both the master and its backup slaves will all be lost at once. (We noticed in this issue #3007 (comment) that it was mentioned that fix will not fix this situation anyway). In our use case, we have nodes coming and going often, so we do not always know when a set of slots is going away completely.
Not All 16384 Slots Are Covered By Nodes
Output of fix (truncated):
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