shard range is empty...

[Don Bosco Durai]

I created a 3 shard cluster, but seems for one of the shard, the range is 
empty. Anyway to fix it without deleting and recreating the collection?

2015-11-20 08:59:50,901 [solr,writer=0] ERROR 
apache.solr.client.solrj.impl.CloudSolrClient (CloudSolrClient.java:902) - 
Request to collection my_collection failed due to (400) 
org.apache.solr.common.SolrException: No active slice servicing hash code 
b637e7f1 in DocCollection(my_collection)={
  "replicationFactor":"1",
  "shards":{
    "shard2":{
      "range":"d5550000-2aa9ffff",
      "state":"active",
      "replicas":{"core_node2":{
          "core":"my_collection_shard2_replica1",
          "base_url":"http://172.22.64.65:8886/solr";,
          "node_name":"172.22.64.65:8886_solr",
          "state":"active",
          "leader":"true"}}},
    "shard3":{
      "range":"2aaa0000-7fffffff",
      "state":"active",
      "replicas":{"core_node3":{
          "core":"my_collection_shard3_replica1",
          "base_url":"http://172.22.64.64:8886/solr";,
          "node_name":"172.22.64.64:8886_solr",
          "state":"active",
          "leader":"true"}}},
    "shard1":{
      "parent":null,
      "range":null,
      "state":"active",
      "replicas":{"core_node4":{
          "core":"my_collection_shard1_replica1",
          "base_url":"http://172.22.64.63:8886/solr";,
          "node_name":"172.22.64.63:8886_solr",
          "state":"active",
          "leader":"true"}}}},
  "router":{"name":"compositeId"},
  "maxShardsPerNode":"1",
  "autoAddReplicas":"false"}, retry? 0

Thanks

Bosco