EmbeddedMongo on /tmp directory has not execution permission

Hi I’ve an issue with mongo embedded. I’ve fedora 32 SO with kernel “Linux fedora-desktop 5.11.22-100.fc32.x86” set up this dependency on maven:

        <dependency>
            <groupId>de.flapdoodle.embed</groupId>
            <artifactId>de.flapdoodle.embed.mongo</artifactId>
            <version>3.4.8</version>
            <scope>test</scope>
        </dependency>`

And this is my test code:

import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoDatabase;
import de.flapdoodle.embed.mongo.MongodExecutable;
import de.flapdoodle.embed.mongo.MongodProcess;
import de.flapdoodle.embed.mongo.MongodStarter;
import de.flapdoodle.embed.mongo.config.MongodConfig;
import de.flapdoodle.embed.mongo.config.Net;
import de.flapdoodle.embed.mongo.distribution.Version;
import de.flapdoodle.embed.process.runtime.Network;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoClientDatabaseFactory;

import java.io.IOException;

public class EmbMongotest {
    public static void main(String[] args) throws IOException {
        MongodStarter starter = MongodStarter.getDefaultInstance();

        int port = Network.getFreeServerPort();
        MongodConfig mongodConfig = MongodConfig.builder()
                .version(Version.Main.PRODUCTION)
                .net(new Net(port, Network.localhostIsIPv6()))
                .build();

        MongodExecutable mongodExecutable = null;
        try {
            mongodExecutable = starter.prepare(mongodConfig);
            MongodProcess mongod = mongodExecutable.start();

            try (MongoClient mongo = MongoClients.create("mongodb://localhost:"+port)) {
                SimpleMongoClientDatabaseFactory factory = new SimpleMongoClientDatabaseFactory(mongo,"testDB");
                MongoDatabase db = mongo.getDatabase("testDB");
                MongoTemplate template = new MongoTemplate(factory);
                template.save(new TClass("variable"));
            } catch (Exception exception) {
                exception.printStackTrace();
            }
        } finally {
            if (mongodExecutable != null)
                mongodExecutable.stop();
        }
    }

    @Getter
    @Setter
    @AllArgsConstructor
    @NoArgsConstructor
    static class TClass {
        private String testVar;
    }
}

This is the issue that I encountered:

2022-09-12 09:48:16 fedora-desktop ERROR  AbstractProcess:116 - failed to call start()
java.io.IOException: Cannot run program "/tmp/extract-35fba5ae-5537-4e2a-8505-cf700f548460extractmongod": error=13, Permesso negato
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
	at de.flapdoodle.embed.process.runtime.ProcessControl.start(ProcessControl.java:165)
	at de.flapdoodle.embed.process.runtime.AbstractProcess.<init>(AbstractProcess.java:96)
	at de.flapdoodle.embed.mongo.AbstractMongoProcess.<init>(AbstractMongoProcess.java:53)
	at de.flapdoodle.embed.mongo.MongodProcess.<init>(MongodProcess.java:50)
	at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:44)
	at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:34)
	at de.flapdoodle.embed.process.runtime.Executable.start(Executable.java:109)
	at com.fw.EmbMongotest.main(EmbMongotest.java:39)
Caused by: java.io.IOException: error=13, Permesso negato
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:340)
	at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:271)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
	... 9 common frames omitted

I have tried to set system properties flapdoodle directory to another dir with all permission but it not works too. Only if I launch the java application with root permission I can run this code without errors.

I have had this error since 1 month ago. Before the mongoembedded worked great.

[michaelmosmann]

@filirnd with the latest release i extract all binaries to some directory in home folder and checking the hash of the content to ensure that the right version is used … so /tmp is not used for that anymore.

[filirnd]

@filirnd found this: https://stackoverflow.com/questions/56942214/how-to-install-mongod-with-libcurl4

Thank you. However, is not a problem, now embedded mongo works great. Seems it uses the home folder now for temporary files. I’m going to close the issue. Thank you for your support.