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[8.12] Improve CANNOT_REBALANCE_CAN_ALLOCATE explanation (#104904) #104910

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elasticsearchmachine merged 1 commit into from
Jan 30, 2024
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[8.12] Improve CANNOT_REBALANCE_CAN_ALLOCATE explanation (#104904) #104910

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5 changes: 5 additions & 0 deletions docs/changelog/104904.yaml
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@@ -0,0 +1,5 @@
pr: 104904
summary: Improve `CANNOT_REBALANCE_CAN_ALLOCATE` explanation
area: Allocation
type: bug
issues: []
8 changes: 5 additions & 3 deletions server/src/main/java/org/elasticsearch/cluster/routing/allocation/Explanations.java
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Expand Up @@ -79,9 +79,11 @@ public static final class Rebalance {
activities. The shard will be rebalanced when those activities finish. Please wait.""";

public static final String CANNOT_REBALANCE_CAN_ALLOCATE = """
Elasticsearch is allowed to allocate this shard to another node but it isn't allowed to rebalance the shard there. If you \
expect this shard to be rebalanced to another node, find this node in the node-by-node explanation and address the reasons \
which prevent Elasticsearch from rebalancing this shard there.""";
Elasticsearch is allowed to allocate this shard on another node, and there is at least one node to which it could move this \
shard that would improve the overall cluster balance, but it isn't allowed to rebalance this shard there. If you expect this \
shard to be rebalanced to another node, check the cluster-wide rebalancing decisions and address any reasons preventing \
Elasticsearch from rebalancing shards within the cluster, and then find the expected node in the node-by-node explanation and \
address the reasons which prevent Elasticsearch from moving this shard there.""";

public static final String CANNOT_REBALANCE_CANNOT_ALLOCATE = """
Elasticsearch is not allowed to allocate or rebalance this shard to another node. If you expect this shard to be rebalanced to \
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