# More than 1 shard not getting assigned to a node **URL:** \ **Category:** Elasticsearch\ **Created:** [July 28, 2021, 5:12am UTC](https://discuss.elastic.co/t/more-than-1-shard-not-getting-assigned-to-a-node/279797 "2021-07-28T05:12:58Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![srivatsa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/srivatsa/32/111417_2.png) [@srivatsa](https://discuss.elastic.co/u/srivatsa)\ **Post date:** [July 28, 2021, 5:12am UTC](https://discuss.elastic.co/t/more-than-1-shard-not-getting-assigned-to-a-node/279797/1 "2021-07-28T05:12:58Z")
ES version - 6.8 Setup - 3 nodes with **default** rack\_id I am trying to logically separate out clusters inside the single cluster by using the rack\_id awareness attribute, the problem I am facing is that only one shard is getting assigned per node within the default rack (which has 3 nodes). If we want to have multiple shards of an index on a single node, is there any way of doing it? ```auto { "index" : "racktest3", "shard" : 0, "primary" : false, "current_state" : "unassigned", "unassigned_info" : { "reason" : "INDEX_CREATED", "at" : "2021-07-28T04:36:12.746Z", "last_allocation_status" : "no_attempt" }, "can_allocate" : "no", "allocate_explanation" : "cannot allocate because allocation is not permitted to any of the nodes", "node_allocation_decisions" : [ { "node_id" : "Jq9ziPd6RNCu84sp62Es8Q", "node_name" : "NODE1", "transport_address" : "NODE1:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 1, "deciders" : [ { "decider" : "same_shard", "decision" : "NO", "explanation" : "the shard cannot be allocated to the same node on which a copy of the shard already exists [[racktest3][0], node[Jq9ziPd6RNCu84sp62Es8Q], [P], s[STARTED], a[id=7NrHDQGEQ7aBXCUa4UdZzw]]" } ] }, { "node_id" : "R5zPkbcXRRKCYXpDCscxKA", "node_name" : "NODE2", "transport_address" : "NODE2:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 2, "deciders" : [ { "decider" : "same_shard", "decision" : "NO", "explanation" : "the shard cannot be allocated to the same node on which a copy of the shard already exists [[racktest3][0], node[R5zPkbcXRRKCYXpDCscxKA], [R], s[STARTED], a[id=9IAhcRAWReO9vSsf_uBDag]]" } ] }, { "node_id" : "J3wOYnrrTJm4yQuuK4iU7g", "node_name" : "NODE3", "transport_address" : "NODE3:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 3, "deciders" : [ { "decider" : "same_shard", "decision" : "NO", "explanation" : "the shard cannot be allocated to the same node on which a copy of the shard already exists [[racktest3][0], node[J3wOYnrrTJm4yQuuK4iU7g], [R], s[STARTED], a[id=ZmZ--EYkQPSjuYMAw9fzCA]]" } ] } ] } ``` ---
**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\ **Post date:** [July 28, 2021, 8:15am UTC](https://discuss.elastic.co/t/more-than-1-shard-not-getting-assigned-to-a-node/279797/2 "2021-07-28T08:15:04Z")
Please share the allocation configuration from your nodes as well as the configuration from the index the shards belongs to. Thanks! ---
**Author:** ![srivatsa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/srivatsa/32/111417_2.png) [@srivatsa](https://discuss.elastic.co/u/srivatsa)\ **Post date:** [August 13, 2021, 7:11am UTC](https://discuss.elastic.co/t/more-than-1-shard-not-getting-assigned-to-a-node/279797/3 "2021-08-13T07:11:36Z")
HI, The current cluster configuration is that we have 6 nodes in the cluster which are segregated into 2 using the rack\_id attribute. [rack\_id=default] 17.1.4.19 node-1 17.1.4.7 node-2 17.1.4.24 node-3 [rack\_id=rack1] 17.1.4.26 node-4 17.1.4.27 node-5 17.1.4.28 node-6 Our observation is that when we create an index with 3 shards & 0 replicas, the primary shards are assigned to the nodes of the assigned rack but when I create an index with 3 shards & 1 replica we notice that the replicas go unassigned. Index setting. - ```auto {"racktest1":{"settings":{"index":{"routing":{"allocation":{"include":{"rack_id":"rack1"}}},"number_of_shards":"3","provided_name":"racktest1","creation_date":"1628837329914","number_of_replicas":"1","uuid":"cgbMo6l-Tu2jqzpsYPFO4w","version":{"created":"6081199"}}}}} ``` This is the allocation plan for that index - ```auto { "index" : "racktest1", "shard" : 0, "primary" : false, "current_state" : "unassigned", "unassigned_info" : { "reason" : "INDEX_CREATED", "at" : "2021-08-13T06:48:49.922Z", "last_allocation_status" : "no_attempt" }, "can_allocate" : "no", "allocate_explanation" : "cannot allocate because allocation is not permitted to any of the nodes", "node_allocation_decisions" : [ { "node_id" : "udB5tWOARZSu_rbpDCQL_w", "node_name" : "17.1.4.28", "transport_address" : "17.1.4.28:9300", "node_attributes" : { "rack_id" : "rack1", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 1, "deciders" : [ { "decider" : "same_shard", "decision" : "NO", "explanation" : "the shard cannot be allocated to the same node on which a copy of the shard already exists [[racktest1][0], node[udB5tWOARZSu_rbpDCQL_w], [P], s[STARTED], a[id=OKBK4snoSN26uRClvjjFoQ]]" }, { "decider" : "awareness", "decision" : "NO", "explanation" : "there are too many copies of the shard allocated to nodes with attribute [rack_id], there are [2] total configured shard copies for this shard id and [2] total attribute values, expected the allocated shard count per attribute [2] to be less than or equal to the upper bound of the required number of shards per attribute [1]" } ] }, { "node_id" : "4dVAAORkTj6_V6jZ79Rfjw", "node_name" : "17.1.4.27", "transport_address" : "17.1.4.27:9300", "node_attributes" : { "rack_id" : "rack1", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 2, "deciders" : [ { "decider" : "awareness", "decision" : "NO", "explanation" : "there are too many copies of the shard allocated to nodes with attribute [rack_id], there are [2] total configured shard copies for this shard id and [2] total attribute values, expected the allocated shard count per attribute [2] to be less than or equal to the upper bound of the required number of shards per attribute [1]" } ] }, { "node_id" : "T3Mzh1-0RzWDEQLG7rcSew", "node_name" : "17.1.4.26", "transport_address" : "17.1.4.26:9300", "node_attributes" : { "rack_id" : "rack1", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 3, "deciders" : [ { "decider" : "awareness", "decision" : "NO", "explanation" : "there are too many copies of the shard allocated to nodes with attribute [rack_id], there are [2] total configured shard copies for this shard id and [2] total attribute values, expected the allocated shard count per attribute [2] to be less than or equal to the upper bound of the required number of shards per attribute [1]" } ] }, { "node_id" : "R5zPkbcXRRKCYXpDCscxKA", "node_name" : "17.1.4.7", "transport_address" : "17.1.4.7:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 4, "deciders" : [ { "decider" : "filter", "decision" : "NO", "explanation" : "node does not match index setting [index.routing.allocation.include] filters [rack_id:\"rack1\"]" } ] }, { "node_id" : "Jq9ziPd6RNCu84sp62Es8Q", "node_name" : "17.1.4.19", "transport_address" : "17.1.4.19:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 5, "deciders" : [ { "decider" : "filter", "decision" : "NO", "explanation" : "node does not match index setting [index.routing.allocation.include] filters [rack_id:\"rack1\"]" } ] }, { "node_id" : "J3wOYnrrTJm4yQuuK4iU7g", "node_name" : "17.1.4.24", "transport_address" : "17.1.4.24:9300", "node_attributes" : { "rack_id" : "default", "xpack.installed" : "true" }, "node_decision" : "no", "weight_ranking" : 6, "deciders" : [ { "decider" : "filter", "decision" : "NO", "explanation" : "node does not match index setting [index.routing.allocation.include] filters [rack_id:\"rack1\"]" } ] } ] } ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 10, 2021, 7:12am UTC](https://discuss.elastic.co/t/more-than-1-shard-not-getting-assigned-to-a-node/279797/4 "2021-09-10T07:12:03Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.