From e8066d34258d9d80c4fb8361b874533e6858f654 Mon Sep 17 00:00:00 2001
From: Vova Kolmakov <wombatukun@apache.org>
Date: Mon, 15 Jun 2026 14:23:49 +0700
Subject: [PATCH] [MINOR] Cap UT_FT_10 Azure install to -T 2 to avoid flaky
 compiler heap OOM

The UT_FT_10 Azure job builds the full reactor with `mvn clean install` under the shared MVN_OPTS_INSTALL `-T 3` inside a single `-Xmx8g` JVM, and intermittently OOMs during compilation (most recently hudi-kafka-connect-bundle) when several heavy concurrent builds align in time. Prepend `-T 2` to this job's install so Maven (first -T wins) caps its concurrency to 2 while every other job keeps the shared -T 3. Local measurement: the full install peaks at ~2.4 GB at -T 1 and -T 2 vs ~2.9 GB at -T 3, all well under the 8g ceiling, and -T 2 keeps essentially the same wall-clock as -T 3.
---
 azure-pipelines-20230430.yml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/azure-pipelines-20230430.yml b/azure-pipelines-20230430.yml
index 3edac6046b1a3..ce003a13b11f3 100644
--- a/azure-pipelines-20230430.yml
+++ b/azure-pipelines-20230430.yml
@@ -515,11 +515,17 @@ stages:
               containerRegistry: 'apachehudi-docker-hub'
               repository: 'apachehudi/hudi-ci-bundle-validation-base'
               command: 'run'
+              # UT_FT_10 builds the full reactor with `clean install`. Under the
+              # shared MVN_OPTS_INSTALL `-T 3`, concurrent module builds (notably
+              # parallel maven-shade of large bundles) can spike heap past the 8g
+              # ceiling and flakily OOM. Prepend `-T 2` below so Maven (first -T
+              # wins) caps concurrency for THIS job's install only; other jobs
+              # keep the shared -T 3.
               arguments: >
                 -v $(Build.SourcesDirectory):/hudi
                 -v /var/run/docker.sock:/var/run/docker.sock
                 -i docker.io/apachehudi/hudi-ci-bundle-validation-base:$(Build.BuildId)
-                /bin/bash -c "MAVEN_OPTS='-Xmx8g' mvn clean install $(MVN_OPTS_INSTALL) -Phudi-platform-service -Pthrift-gen-source
+                /bin/bash -c "MAVEN_OPTS='-Xmx8g' mvn clean install -T 2 $(MVN_OPTS_INSTALL) -Phudi-platform-service -Pthrift-gen-source
                 && mvn test  $(MVN_OPTS_TEST) -Punit-tests -Dsurefire.failIfNoSpecifiedTests=false $(JACOCO_AGENT_DESTFILE1_ARG) -pl $(JOB10_UT_MODULES)
                 && mvn test  $(MVN_OPTS_TEST) -Punit-tests $(JACOCO_AGENT_DESTFILE2_ARG) -Dtest="!TestHoodie*" -Dsurefire.failIfNoSpecifiedTests=false -pl hudi-utilities
                 && mvn test  $(MVN_OPTS_TEST) -Pfunctional-tests -Dsurefire.failIfNoSpecifiedTests=false  $(JACOCO_AGENT_DESTFILE3_ARG) -pl $(JOB10_FT_MODULES)"