Q: Failed Index shard allocation "shard or keyspace unavailable" We have three node elasendra cluster.We upgraded it recently, but after that I can see indices on each node are red.
[f_historical_stories_qa_2020_03_30][0], node[0fObMI6wRVqgLlsNtKHeCA], [P], recovery_source[local shards recovery], s[UNASSIGNED], unassigned_info[[reason=ALLOCATION_FAILED], at[1970-01-01T00:00:00.000Z], failed_attempts[1], delayed=false, details[shard or keyspace unavailable], allocation_status[deciders_no]]

Below is the output of nodetool gossipinfo.
Anything which we can do to fix this.
> generation:1649500730   heartbeat:87842  
> STATUS:17:NORMAL,-1018529224246886842   LOAD:87795:1.30088145529E11  
> SCHEMA:7956:b908cd30-130a-3a78-b5e1-d7b2b9f9d530   DC:9:dc1  
> RACK:11:rack1   RELEASE_VERSION:5:3.11.9.1  
> INTERNAL_IP:7:xxx.xxx.xxx.xx   RPC_ADDRESS:4: xxx.xxx.xxx.xx  
> NET_VERSION:2:11   HOST_ID:3:f9ed38c8-b7e0-4944-a0fe-4af6b5c6eb84  
> RPC_READY:29:true  
> X1:56:{"f_historical_stories_qa_2020_08_16":3,"f_historical_stories_qa_2020_08_17":3,"f_historical_stories_qa_2021_01_31":3,"f_historical_stories_qa_2020_08_18":3,"f_historical_stories_qa_2020_08_19":3,"f_historical_stories_qa_2021_01_30":3,"f_historical_stories_qa_2020_08_23":3,"f_historical_stories_qa_2020_08_24":3,"f_historical_stories_qa_2020_08_25":3,
> =================

