feat: Improve startup times by setting flow.election.max.candidates (#953)

* feat: Improve startup times by setting flow.election.max.candidates

* nix

* Use released op-rs

* More nix stuff?

* test: Another timeout increase

Author: sbernauer

CHANGELOG.md

@@ -23,6 +23,8 @@ All notable changes to this project will be documented in this file.
 - test: Bump vector-aggregator to 0.55.0, replace /graphql call with gRPC call ([#940]).
 - BREAKING: Removed product-config machinery. This is a breaking change in terms of configuration.
   Users relying on the product-config `properties.yaml` file have to set these properties via the CRD ([#945]).
+- In case the user specifies a fixed number of NiFi nodes (i.e. no auto-scaling), set `nifi.cluster.flow.election.max.candidates` to that number.
+  This results in much faster NiFi startups, as it doesn't need to wait for the 5 minutes of `nifi.cluster.flow.election.max.wait.time` ([#953]).
 
 ### Fixed
 
@@ -38,6 +40,7 @@ All notable changes to this project will be documented in this file.
 [#936]: https://github.com/stackabletech/nifi-operator/pull/936
 [#940]: https://github.com/stackabletech/nifi-operator/pull/940
 [#945]: https://github.com/stackabletech/nifi-operator/pull/945
+[#953]: https://github.com/stackabletech/nifi-operator/pull/953
 [#959]: https://github.com/stackabletech/nifi-operator/pull/959
 
 ## [26.3.0] - 2026-03-16

Cargo.lock

@@ -10,7 +10,7 @@ edition = "2021"
 repository = "https://github.com/stackabletech/nifi-operator"
 
 [workspace.dependencies]
-stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.113.3", features = ["webhook"] }
+stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.113.4", features = ["webhook"] }
 
 anyhow = "1.0"
 built = { version = "0.8", features = ["chrono", "git2"] }
@@ -33,6 +33,6 @@ tokio = { version = "1.52", features = ["full"] }
 tracing = "0.1"
 url = { version = "2.5.7" }
 
-# [patch."https://github.com/stackabletech/operator-rs.git"]
+[patch."https://github.com/stackabletech/operator-rs.git"]
 # stackable-operator = { git = "https://github.com/stackabletech//operator-rs.git", branch = "main" }
 # stackable-operator = { path = "../operator-rs/crates/stackable-operator" }

Cargo.nix

@@ -204,7 +204,6 @@ spec:
         nifi.security.user.oidc.additional.scopes: "profile"
         nifi.security.user.oidc.claim.identifying.user: "upn"
         nifi.process.group.root.placeholder: "root"
-        nifi.cluster.flow.election.max.wait.time: "10 secs"
     podOverrides:
       spec:
         initContainers: