release: 21.03.3

lablup · Apr 13, 2021 · 1b0db3a · 1b0db3a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -16,6 +16,19 @@ Changes
 
 .. towncrier release notes start
 
+21.03.3 (2021-04-13)
+--------------------
+
+### Features
+* Rewrite the session scheduler to avoid HoL blocking ([#415](https://github.com/lablup/backend.ai-manager/issues/415))
+  - Skip over sessions in the queue if they fail to satisfy predicates for multiple retries -> 1st case of HoL blocking: a rogue pending session blocks everything in the same scaling group
+  - You may configure the maximum number of retries in the `config/plugins/scheduler/fifo/num_retries_to_skip` etcd key.
+  - Split the scheduler into two async loops for scheduling decision and session spawning by inserting "SCHEDULED" status between "PENDING" and "PREPARING" statuses -> 2nd case of HoL blocking: failure isolation with each task
+
+### Fixes
+* Adjust the firing rate of `DoPrepareEvent` to follow and alternate with the scheduler execution ([#418](https://github.com/lablup/backend.ai-manager/issues/418))
+
+
 21.03.2 (2021-04-02)
 --------------------
 

diff --git a/changes/415.feature b/changes/415.feature
diff --git a/changes/418.fix b/changes/418.fix
diff --git a/src/ai/backend/manager/__init__.py b/src/ai/backend/manager/__init__.py
@@ -1 +1 @@
-__version__ = '21.03.2'
+__version__ = '21.03.3'