[2.3.0] Checkmk Werk 16215 created: agent_elasticsearch: resolve error when requesting indices stats

Title: agent_elasticsearch: resolve error when requesting indices stats Class: fix Compatible: compat Component: checks Date: 1699277518 Edition: cre Level: 1 Version: 2.3.0b1 There is a special error case which arises when trying to request the indices stats from Elasticsearch which has at least one alias pointing to a closed index. In the previous version, the special agent completely failed in such scenarios. This werk resolves this by requesting only the accessible indices.