Elasticsearch: NPE when deleting multiple backing indices on a data stream

[danhermann]

As reported by @Snp3r here: https://github.com/elastic/elasticsearch/pull/55690#issuecomment-691087407:

I've got 500 error, nullpointer exception when I trying to delete multiple backing indices:

curl -X DELETE "localhost:9200/.ds-my-data-stream-000001,.ds-my-data-stream-000002?pretty"
{ "error" : { "root_cause" : [ { "type" : "null_pointer_exception", "reason" : null } ], "type" : "null_pointer_exception", "reason" : null }, "status" : 500 }

Deleting one by one is ok:

curl -X DELETE "localhost:9200/.ds-my-data-stream-000001?pretty"
{ "acknowledged" : true }
curl -X DELETE "localhost:9200/.ds-my-data-stream-000002?pretty"
{ "acknowledged" : true }

[elasticmachine]

Pinging @elastic/es-core-features (:Core/Features/Data streams)

[immanuelfodor]

When can one expect the next release with this fix? In a month's time or maybe sooner?

[danhermann]

When can one expect the next release with this fix? In a month's time or maybe sooner?

We hope to release in ~3 weeks though we cannot commit to any specific timeframe for future releases.