From c413ce1b2e50d8abedcc12ae7b7ebfe2a4894283 Mon Sep 17 00:00:00 2001
From: MOZGIII <mozgiii@mzg.io>
Date: Sun, 12 Apr 2026 23:45:27 +0400
Subject: [PATCH 1/2] Update rand 0.9.2 to 0.9.3

---
 Cargo.lock | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index fcee99ae..e92711d0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1814,7 +1814,7 @@ dependencies = [
  "ordered-float",
  "quanta",
  "radix_trie",
- "rand 0.9.2",
+ "rand 0.9.3",
  "rand_xoshiro",
  "sketches-ddsketch",
 ]
@@ -2300,7 +2300,7 @@ dependencies = [
  "bit-vec",
  "bitflags 2.11.0",
  "num-traits",
- "rand 0.9.2",
+ "rand 0.9.3",
  "rand_chacha 0.9.0",
  "rand_xorshift",
  "regex-syntax",
@@ -2453,9 +2453,9 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.9.2"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+checksum = "7ec095654a25171c2124e9e3393a930bddbffdc939556c914957a4c3e0a87166"
 dependencies = [
  "rand_chacha 0.9.0",
  "rand_core 0.9.5",

From 234a9b0edd2a679cc80d756232f45da18f997d6b Mon Sep 17 00:00:00 2001
From: MOZGIII <mozgiii@mzg.io>
Date: Sun, 12 Apr 2026 23:54:24 +0400
Subject: [PATCH 2/2] Bump workspace rand to 0.9

---
 Cargo.lock                             |  6 +++---
 Cargo.toml                             |  2 +-
 crates/bin/benchmark/src/main.rs       |  2 +-
 crates/bin/soak-harness/src/flow.rs    | 12 ++++++------
 crates/lib/scheduler-core/src/utils.rs |  2 +-
 5 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index e92711d0..d14684ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4039,7 +4039,7 @@ version = "0.1.0"
 dependencies = [
  "clap",
  "prost 0.12.6",
- "rand 0.8.5",
+ "rand 0.9.3",
  "serde_json",
  "sha2",
  "sqlx",
@@ -4507,7 +4507,7 @@ version = "0.1.0"
 dependencies = [
  "chrono",
  "cron",
- "rand 0.8.5",
+ "rand 0.9.3",
  "serde",
  "uuid",
  "waymark-ids",
@@ -4599,7 +4599,7 @@ dependencies = [
  "chrono",
  "clap",
  "prost 0.12.6",
- "rand 0.8.5",
+ "rand 0.9.3",
  "serde",
  "serde_json",
  "sha2",
diff --git a/Cargo.toml b/Cargo.toml
index 991c2e26..1b6a0fba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -93,7 +93,7 @@ proptest = "1.9"
 prost = "0.12"
 prost-types = "0.12"
 quote = "1"
-rand = "0.8"
+rand = "0.9"
 regex = "1"
 rmp-serde = "1"
 rustc-hash = "2"
diff --git a/crates/bin/benchmark/src/main.rs b/crates/bin/benchmark/src/main.rs
index 29200160..847d685a 100644
--- a/crates/bin/benchmark/src/main.rs
+++ b/crates/bin/benchmark/src/main.rs
@@ -205,7 +205,7 @@ async fn queue_benchmark_instances(
             case_names.push(name.clone());
         }
     }
-    case_names.shuffle(&mut rand::thread_rng());
+    case_names.shuffle(&mut rand::rng());
 
     let mut queued = 0;
     let mut batch = Vec::new();
diff --git a/crates/bin/soak-harness/src/flow.rs b/crates/bin/soak-harness/src/flow.rs
index 90b0f1bd..05eb72ce 100644
--- a/crates/bin/soak-harness/src/flow.rs
+++ b/crates/bin/soak-harness/src/flow.rs
@@ -316,25 +316,25 @@ fn sample_step_behavior(args: &crate::cli::SoakArgs, rng: &mut StdRng) -> (i64,
     let failure_threshold = timeout_threshold + args.failure_percent;
     let slow_threshold = failure_threshold + args.slow_percent;
 
-    let class = rng.gen_range(0.0..100.0);
+    let class = rng.random_range(0.0..100.0);
     let timeout_base_ms = i64::from(args.timeout_seconds) * 1000;
 
     if class < timeout_threshold {
-        let delay_ms = rng.gen_range(
+        let delay_ms = rng.random_range(
             (timeout_base_ms + 1500)..=(timeout_base_ms * 3).max(timeout_base_ms + 1500),
         );
         return (delay_ms, false);
     }
 
     if class < failure_threshold {
-        return (rng.gen_range(50..=400), true);
+        return (rng.random_range(50..=400), true);
     }
 
     if class < slow_threshold {
-        return (rng.gen_range(1_000..=8_000), false);
+        return (rng.random_range(1_000..=8_000), false);
     }
 
-    (rng.gen_range(25..=400), false)
+    (rng.random_range(25..=400), false)
 }
 
 fn jitter_payload(base_payload: i64, rng: &mut StdRng) -> i64 {
@@ -344,7 +344,7 @@ fn jitter_payload(base_payload: i64, rng: &mut StdRng) -> i64 {
 
     let lower = (base_payload / 2).max(1);
     let upper = (base_payload * 3 / 2).max(lower);
-    rng.gen_range(lower..=upper)
+    rng.random_range(lower..=upper)
 }
 
 fn build_instance(
diff --git a/crates/lib/scheduler-core/src/utils.rs b/crates/lib/scheduler-core/src/utils.rs
index 4530329f..379fc97e 100644
--- a/crates/lib/scheduler-core/src/utils.rs
+++ b/crates/lib/scheduler-core/src/utils.rs
@@ -78,7 +78,7 @@ pub fn apply_jitter(base: DateTime<Utc>, jitter_seconds: i64) -> Result<DateTime
     if jitter_seconds == 0 {
         return Ok(base);
     }
-    let jitter = rand::thread_rng().gen_range(0..=jitter_seconds);
+    let jitter = rand::rng().random_range(0..=jitter_seconds);
     Ok(base + chrono::Duration::seconds(jitter))
 }