SpringBoot SpringBoot Admin leaks file descriptors and runs out of file descriptors

this is my project pom:

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xxx.xxx</groupId>
    <artifactId>xxx</artifactId>
    <version>0.0.6</version>
    <name>xxx</name>
    <description>xxx</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin-starter.version>2.2.3</spring-boot-admin-starter.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>${spring-boot-admin-starter.version}</version>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>${spring-boot-admin-starter.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

when I run admin server, metric of "process.files.open" will continuous growing till run out of file descriptors.

when I update "spring-boot-starter-parent" version from 2.3.1.RELEASE to 2.3.0.RELEASE, it will run well.

Comment From: bclozel

Spring Boot Admin is not managed by the Spring team. You can reach out to the maintainers here: https://github.com/codecentric/spring-boot-admin/issues

Thanks!