From 5de256792cb1ea9fbb29adef7b8c9633ef6ee598 Mon Sep 17 00:00:00 2001
From: Claude <cvandermerwe@google.com>
Date: Tue, 3 Jun 2025 17:27:19 +0000
Subject: [PATCH 1/2] Add known issues.

---
 CHANGES.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGES.md b/CHANGES.md
index cff581230b7d..d4ab39289d26 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -156,7 +156,9 @@
 
 ## Known Issues
 
-N/A
+* [Python] GroupIntoBatches may fail in streaming pipelines. This is caused by cloudpickle. To mitigate this issue specify `pickle_library=dill` in pipeline options ([#35062](https://github.com/apache/beam/issues/35062))
+* [Python] vLLM breaks dataflow logging. To mitigate this issue, set the `VLLM_CONFIGURE_LOGGING=0` environment variable in your custom container.
+* [Python] vLLM leaks connections causing a throughput bottleneck and underutilization of GPU. To mitigate this issue increase the number of `number_of_worker_harness_threads`.
 
 # [2.64.0] - 2025-03-31
 

From f70805224727c7bc7ff237020bbf7f0a8ffd2b4e Mon Sep 17 00:00:00 2001
From: Claude <cvandermerwe@google.com>
Date: Tue, 3 Jun 2025 17:51:52 +0000
Subject: [PATCH 2/2] Add fixes notes.

---
 CHANGES.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGES.md b/CHANGES.md
index d4ab39289d26..3cbcf2c35c2e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -96,6 +96,8 @@
 
 * Fixed X (Java/Python) ([#X](https://github.com/apache/beam/issues/X)).
 * (Java) Fixed cassandraIO ReadAll does not let a pipeline handle or retry exceptions ([#34191](https://github.com/apache/beam/pull/34191)).
+* [Python] Fixed vLLM breaks dataflow logging. ([35053](https://github.com/apache/beam/pull/35053))
+* [Python] Fixed vLLM leaks connections causing a throughput bottleneck and underutilization of GPU ([35053](https://github.com/apache/beam/pull/35053))
 
 ## Security Fixes
 * Fixed [CVE-YYYY-NNNN](https://www.cve.org/CVERecord?id=CVE-YYYY-NNNN) (Java/Python/Go) ([#X](https://github.com/apache/beam/issues/X)).