shwetathareja

[BUG] ISM listener for cluster state changes is running expensive nodes info call as part of listener and blocking Cluster Applier thread

2

**What is the bug?** For any cluster state change, plugins can attach their listeners and execute the the desired code functionality. These listeners are executed in the ClusterApplierService#updateTask threadpool which...

### Is your feature request related to a problem? Please describe Today, Cluster Manager metadata management like create/update/delete of an index, alias, template, data stream etc. are tightly coupled with...

[BUG] Observability plugin calling createIndex from onNodeStarted method in 2.x branches

8

**What is the bug?** Observability plugin is implementing ClusterPlugin interface https://github.com/opensearch-project/observability/blob/ce58ffa7cbbfed2b34889f7cd5a7fdc32c200647/src/main/kotlin/org/opensearch/observability/ObservabilityPlugin.kt#L48 and onNodeStarted it calls https://github.com/opensearch-project/observability/blob/ce58ffa7cbbfed2b34889f7cd5a7fdc32c200647/src/main/kotlin/org/opensearch/observability/ObservabilityPlugin.kt#L96 which calls createIndex https://github.com/opensearch-project/observability/blob/ce58ffa7cbbfed2b34889f7cd5a7fdc32c200647/src/main/kotlin/org/opensearch/observability/index/ObservabilityIndex.kt#L89-L91 ClusterPlugin - onNodeStarted method is called from Node Bootstrap [(Node.java](https://github.com/opensearch-project/OpenSearch/blob/e68838819710d7040cf2b591590285f1b86f0da0/server/src/main/java/org/opensearch/node/Node.java#L1779))...