Divij Vaidya created KAFKA-16052:
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Summary: OOM in Kafka test suite
Key: KAFKA-16052
URL: https://issues.apache.org/jira/browse/KAFKA-16052
Project: Kafka
Issue Type: Bug
Affects Versions: 3.7.0
Reporter: Divij Vaidya
Our test suite is failing with frequent OOM. Discussion in the mailing list is
here: [https://lists.apache.org/thread/d5js0xpsrsvhgjb10mbzo9cwsy8087x4]
To find the source of leaks, I ran the :core:test build target with a single
thread (see below on how to do it) and attached a profiler to it. This Jira
tracks the list of action items identified from the analysis.
How to run tests using a single thread:
{code:java}
diff --git a/build.gradle b/build.gradle
index f7abbf4f0b..81df03f1ee 100644
--- a/build.gradle
+++ b/build.gradle
@@ -74,9 +74,8 @@ ext {
"--add-opens=java.security.jgss/sun.security.krb5=ALL-UNNAMED"
)- maxTestForks = project.hasProperty('maxParallelForks') ?
maxParallelForks.toInteger() : Runtime.runtime.availableProcessors()
- maxScalacThreads = project.hasProperty('maxScalacThreads') ?
maxScalacThreads.toInteger() :
- Math.min(Runtime.runtime.availableProcessors(), 8)
+ maxTestForks = 1
+ maxScalacThreads = 1
userIgnoreFailures = project.hasProperty('ignoreFailures') ? ignoreFailures
: false userMaxTestRetries = project.hasProperty('maxTestRetries') ?
maxTestRetries.toInteger() : 0
diff --git a/gradle.properties b/gradle.properties
index 4880248cac..ee4b6e3bc1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -30,4 +30,4 @@ scalaVersion=2.13.12
swaggerVersion=2.2.8
task=build
org.gradle.jvmargs=-Xmx2g -Xss4m -XX:+UseParallelGC
-org.gradle.parallel=true
+org.gradle.parallel=false {code}
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