Error with Elastic search

[AyushRoy2001]

Hi sir/ma'am,
I have been receiving an error regarding the elastic search. Can you please help me solve it?
The error: "ERROR:root:Unable to create Index in Elastic Search. Reason: TransportError(503, 'master_not_discovered_exception', None)"

This is received when I try to run:
cd data
wget -O elasticsearch-7.17.9.tar.gz https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.9-linux-x86_64.tar.gz # download Elasticsearch
tar zxvf elasticsearch-7.17.9.tar.gz
rm elasticsearch-7.17.9.tar.gz
cd elasticsearch-7.17.9
nohup bin/elasticsearch & # run Elasticsearch in background
cd ../..
python prep_elastic.py --data_path data/dpr/psgs_w100.tsv --index_name wiki # build index

[AyushRoy2001]

Hi @Bocchi7 , please try to answer to my doubt. There is a shard error and the elastic search code is stuck at 0docs [01:00, ?docs/s].

[Bocchi7]

I am sorry that I tried but failed to reproduce this error. You might have to provide more details about your error.

[AyushRoy2001]

Hi, please see my elasticsearch node health,

{
"cluster_name" : "elasticsearch",
"status" : "red",
"timed_out" : false,
"number_of_nodes" : 1,
"number_of_data_nodes" : 1,
"active_primary_shards" : 2,
"active_shards" : 2,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 3,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 2,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 15,
"active_shards_percent_as_number" : 40.0
}

It shows red, can you please guide me on how to solve it? It was not red earlier and the code was running perfectly.

[Bocchi7]

I am not familiar with the implementation of ElasticSearch. Thus, I cannot give any useful advice.
Since you said "the code was running perfectly", you might try to reinstall elasticsearch and create index again. Creating index might take a lot of time, but this waste of time can be, to a great extent, attributed to the poor implementation of the script. You might try to rewrite it to make it faster.
If you solve the problem in the end, welcome to show your solution here.
Good luck!