Solr: how to delete a collection?

Question

I am using solr 4.9, not adding any additional shard, just use whatever default it comes with it. I have created a collection and tried to delete it by using the following api :

http://<host>/solr/admin/collections?action=DELETE&name=collectionName

but it returns error :

Solr instance is not running in SolrCloud mode

My Solr is not solrCloud, but how do I delete my collection?

score 68 · Answer 1 · answered May 12 '15 at 06:25

68

Go to the solr folder and Do this..

bin/solr delete -c collection_name

and restart solr with

bin/solr restart

answered May 12 '15 at 06:25

Gunjan

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For the restart command, you have to specify the port option, at least the default port, like this: `bin/solr restart -p 8983` – fujy Dec 01 '16 at 16:24
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I did go to the solr fodler, but I all I get is `-bash: bin/solr: No such file or directory ` – Suraj Dec 14 '16 at 11:26
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@Suraj then you can use `. /solr delete -c collection_name` – iMitwe Feb 21 '19 at 13:44
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Is restarting Solr really necessary? – Flux Aug 02 '19 at 05:58

score 9 · Answer 2 · answered Nov 04 '16 at 03:23

9

n.b. Tested against Solr 4.9, should work with newer versions.

curl -v http://localhost:8983/solr/admin/cores?action=UNLOAD&deleteInstanceDir=true&core=collectionName

answered Nov 04 '16 at 03:23

Luke Antins

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This is for cores, not collections. See Adam Seabridge' post – darkfrog Mar 15 '19 at 15:49

score 8 · Answer 3 · answered Jan 21 '19 at 21:50

You can delete the Solr Collection in two ways.

1) From the command prompt:

Launch the command prompt from where you have extracted the Apache Solr. Run the below Command

Solr\bin>solr delete -c My_Collection

2) From the Solr Admin Console:

/admin/collections?action=DELETE&name=collection

For more information about the Apache Solr Collection API. Apache Solr Collection API

score 7 · Answer 4 · answered Jul 31 '14 at 17:22

According to this guide (https://cwiki.apache.org/confluence/display/solr/Collections+API) this API is working only, when you are in a SolrCloud mode.

If you want to just delete core or just delete all docs in that core, take a look here - https://wiki.apache.org/solr/CoreAdmin

score 4 · Answer 5 · answered Jul 22 '16 at 11:00

4

Or do this with the API instead:

http://localhost:8983/solr/admin/collections?action=DELETE&collection=collection1&shard=shard1&replica=core_node1

answered Jul 22 '16 at 11:00

Adam Seabridge

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Rafal · Answer 6 · 2021-03-25T11:06:02.560

You can delete a collection in three ways in the recent versions of Solr.

You can delete the collection manually by using the bin/solr tool
You can delete the collection manually via Solr Admin
You can delete the collection by using the Collections API
You can delete the collection by using the V2 API

Deleting a collection using the bin/solr tool is simple. You go to your SOLR_HOME directory and you run:

bin/solr delete -c COLLECTION_NAME

To delete a collection using the Collections API you would run a command like this:

curl 'localhost:8983/solr/admin/collections?action=DELETE&name=COLLECTION_NAME'

Finally, to use the V2 API and delete a collection using it you would do the following:

curl -XDELETE 'http://localhost:8983/api/c/COLLECTION_NAME'

If you plan on removing the collection very rarely, you can do that manually. If that is something commonly used - for example with aliases and time-based data I would suggest using the V2 API as this is the newest one and will probably replace the old APIs at some point.

score 2 · Answer 7 · answered Dec 24 '16 at 23:06

You could use curl

curl -X GET -H "Content-Type: application/json" "http://localhost:8983/solr/admin/cores?wt=json&action=UNLOAD&core=gettingstarted"

Where gettingstarted is the name of the core that you want to delete. Please note that the above assumes that solr is running on port 8983.

score 1 · Answer 8 · answered Mar 15 '19 at 15:51

Though Adam's response is correct, here's the documentation to help use it: https://lucene.apache.org/solr/guide/7_7/collections-api.html#delete

I got stuck on this one for a while and was only getting the invalid deleting of cores answer, which, I'm guessing used to work for collections, but does not in newer versions.

Solr: how to delete a collection?

8 Answers8