telemenar commented on issue #710:
URL: https://github.com/apache/maven-mvnd/issues/710#issuecomment-2852086694
Some testing that I did locally, initial setup (I'd previously done work to
raise the limits on max files):
```
$ echo "Soft Files Limit"; ulimit -Sn; echo "Hard Files Limit"; ulimit -Hn
Soft Files Limit
245760
Hard Files Limit
245760
$ cat ~/.mavenrc
MAVEN_OPTS="${MAVEN_OPTS} -XX:-MaxFDLimit"
$ cat pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd";>
<modelVersion>4.0.0</modelVersion>
<groupId>org.example.test</groupId>
<artifactId>test-ulimit</artifactId>
<version>0.1</version>
<packaging>pom</packaging>
<name>Ulimit Check</name>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.4.1</version>
<executions>
<execution>
<!-- Run our version calculation script -->
<id>set_ulimits</id>
<goals>
<goal>exec</goal>
</goals>
<phase>validate</phase>
<configuration>
<executable>bash</executable>
<arguments>
<argument>-c</argument>
<argument>echo "Soft Files Limit"; ulimit -Sn; echo "Hard
Files Limit"; ulimit -Hn</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
$ mvnd.sh -version
Apache Maven Daemon (mvnd) 1.0.2 darwin-aarch64 native client
(cccc1ec8a5b741c62b29f9fb04d37b1678a029bb)
Terminal: org.jline.terminal.impl.PosixSysTerminal with pty
org.jline.terminal.impl.jni.osx.OsXNativePty
Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937)
Maven home: /Users/$USER/tools/mvn
Java version: 21.0.4, vendor: Eclipse Adoptium, runtime:
/Library/Java/JavaVirtualMachines/temurin-aarch64-21.0.4.jdk/Contents/Home
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "15.1.1", arch: "aarch64", family: "mac"
```
Then running this 3 different ways:
```
$ MVND_CLIENT=jvm mvnd.sh validate
[INFO] Processing build on daemon 68d1439f
[INFO] Scanning for projects...
[INFO] BuildTimeEventSpy is registered.
[INFO]
[INFO] Using the SmartBuilder implementation with a thread count of 24
[INFO]
[INFO] --------------------< org.example.test:test-ulimit
>--------------------
[INFO] Building Ulimit Check 0.1
[INFO] from pom.xml
[INFO] --------------------------------[ pom
]---------------------------------
[INFO]
[INFO] --- exec:3.4.1:exec (set_ulimits) @ test-ulimit ---
[INFO] [stdout] Soft Files Limit
[INFO] [stdout] 245760
[INFO] [stdout] Hard Files Limit
[INFO] [stdout] 245760
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 0.309 s (Wall Clock)
[INFO] Finished at: 2025-05-05T11:56:02-07:00
[INFO]
------------------------------------------------------------------------
$ mvnd.sh --stop
Stopping 1 running daemons
$ MVND_CLIENT=native mvnd.sh validate
[INFO] Processing build on daemon b23b5b95
[INFO] Scanning for projects...
[INFO] BuildTimeEventSpy is registered.
[INFO]
[INFO] Using the SmartBuilder implementation with a thread count of 24
[INFO]
[INFO] --------------------< org.example.test:test-ulimit
>--------------------
[INFO] Building Ulimit Check 0.1
[INFO] from pom.xml
[INFO] --------------------------------[ pom
]---------------------------------
[INFO]
[INFO] --- exec:3.4.1:exec (set_ulimits) @ test-ulimit ---
[INFO] [stdout] Soft Files Limit
[INFO] [stdout] 10240
[INFO] [stdout] Hard Files Limit
[INFO] [stdout] 245760
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 0.296 s (Wall Clock)
[INFO] Finished at: 2025-05-05T11:56:18-07:00
[INFO]
------------------------------------------------------------------------
$ mvn validate
[INFO] Scanning for projects...
[INFO]
[INFO] --------------------< org.example.test:test-ulimit
>--------------------
[INFO] Building Ulimit Check 0.1
[INFO] from pom.xml
[INFO] --------------------------------[ pom
]---------------------------------
[INFO]
[INFO] --- exec:3.4.1:exec (set_ulimits) @ test-ulimit ---
Soft Files Limit
245760
Hard Files Limit
245760
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 0.263 s
[INFO] Finished at: 2025-05-05T11:56:41-07:00
[INFO]
------------------------------------------------------------------------
```
Then if I delete that `.mavenrc` the all of the different runs all behave
the same way:
```
$ rm ~/.mavenrc
$ mvn validate
[INFO] Scanning for projects...
[INFO]
[INFO] --------------------< org.example.test:test-ulimit
>--------------------
[INFO] Building Ulimit Check 0.1
[INFO] from pom.xml
[INFO] --------------------------------[ pom
]---------------------------------
[INFO]
[INFO] --- exec:3.4.1:exec (set_ulimits) @ test-ulimit ---
Soft Files Limit
10240
Hard Files Limit
245760
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 0.267 s
[INFO] Finished at: 2025-05-05T12:12:36-07:00
[INFO]
------------------------------------------------------------------------
```
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