Java 11环境下JanusGraph调用JanusGraphFactory.open()卡住无报错

原本在Java 8容器中运行JanusGraph完全正常，迁移到Java 11容器后，程序卡在JanusGraphFactory.open(this.db_property_file)代码行，无任何错误或警告输出。

相关代码 #

graph = JanusGraphFactory.open(this.db_property_file); // 卡在此行

配置文件 #

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 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>2.2.6.RELEASE</version>
    <relativePath />
    <!-- lookup parent from repository -->
  </parent>
  <groupId>com.example</groupId>
  <artifactId>janus</artifactId>
  <version>latest</version>
  <name>janusms</name>
  <description>Janus MS</description>
  <properties>
    <java.version>1.8</java.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>5.3.20</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>org.junit.vintage</groupId>
          <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>com.google.code.gson</groupId>
      <artifactId>gson</artifactId>
      <version>2.8.9</version>
    </dependency>
    <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.2.9</version>
        </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.janusgraph</groupId>
      <artifactId>janusgraph-core</artifactId>
      <version>1.0.0-rc2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tinkerpop</groupId>
      <artifactId>gremlin-server</artifactId>
      <version>3.6.2</version>
    </dependency>
    <dependency>
      <groupId>org.janusgraph</groupId>
      <artifactId>janusgraph-es</artifactId>
      <version>0.6.2</version>
    </dependency>
    <dependency>
      <groupId>org.janusgraph</groupId>
      <artifactId>janusgraph-lucene</artifactId>
      <version>0.6.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tinkerpop</groupId>
      <artifactId>gremlin-driver</artifactId>
      <version>3.4.4</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy</artifactId>
        <version>3.0.8</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-simple</artifactId>
      <version>2.0.6</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.11.0</version>
    </dependency>
    <dependency>
      <groupId>com.univocity</groupId>
      <artifactId>univocity-parsers</artifactId>
      <version>2.9.1</version>
    </dependency>
    <dependency>
      <groupId>org.janusgraph</groupId>
      <artifactId>janusgraph-cassandra</artifactId>
      <version>0.4.1</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.12.7.1</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.13.5</version>
  </dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.13.5</version>
</dependency>
    <dependency>
      <groupId>org.janusgraph</groupId>
      <artifactId>janusgraph-berkeleyje</artifactId>
      <version>0.4.1</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.5</version>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>2.9.2</version>
    </dependency>
    <dependency>
      <groupId>javax.ws.rs</groupId>
      <artifactId>javax.ws.rs-api</artifactId>
      <version>2.0</version>
    </dependency>
    <dependency>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>20.0</version>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>2.9.2</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
          <mainClass>app.InferenceMsApplication</mainClass>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

janusgraph.properties

gremlin.graph=org.janusgraph.core.JanusGraphFactory
storage.backend=berkeleyje
index.search.backend=lucene
storage.batch-loading=true
storage.berkeleyje.cache-percentage=1
query.force-index=true

已尝试的排查操作 #

• 将JanusGraph核心版本升级至1.0.0-rc2
• 检查属性文件是否被占用，排除死锁可能
• 验证Java 8镜像可正常运行

解决方案 #

1. 统一JanusGraph组件版本
   当前pom中JanusGraph核心是1.0.0-rc2，但berkeleyje、lucene等依赖仍为0.4.1/0.6.2，版本差异过大导致Java 11下兼容性问题。将所有JanusGraph相关依赖统一为1.0.0-rc2：

   <dependency>
     <groupId>org.janusgraph</groupId>
     <artifactId>janusgraph-berkeleyje</artifactId>
     <version>1.0.0-rc2</version>
   </dependency>
   <dependency>
     <groupId>org.janusgraph</groupId>
     <artifactId>janusgraph-lucene</artifactId>
     <version>1.0.0-rc2</version>
   </dependency>
   <!-- 其他JanusGraph组件同步更新版本 -->
   

2. 更新Java版本配置
   在pom.xml的properties节点中，将<java.version>1.8</java.version>改为<java.version>11</java.version>，确保编译和运行环境版本一致。

3. 调整日志配置排查隐藏错误
   当前使用的slf4j-simple无法输出JanusGraph初始化阶段的调试日志，替换为logback并开启DEBUG级别：

   <dependency>
     <groupId>ch.qos.logback</groupId>
     <artifactId>logback-classic</artifactId>
     <version>1.2.9</version>
   </dependency>
   <!-- 移除slf4j-simple依赖 -->
   

   添加logback.xml配置文件：

   <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
       <encoder>
         <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
       </encoder>
     </appender>
     <root level="debug">
       <appender-ref ref="STDOUT" />
     </root>
   </configuration>
   

4. 添加Java 11模块兼容参数
   JanusGraph初始化时可能涉及反射访问JDK内部类，添加JVM启动参数解决模块访问限制：

   --add-opens java.base/java.lang=ALL-UNNAMED
   --add-opens java.base/java.util=ALL-UNNAMED
   

5. 清理BerkeleyJE存储目录
   旧版本BerkeleyJE生成的锁文件或数据可能在Java 11下不兼容，清理存储目录后重新初始化，同时确保容器对存储目录有读写权限。

内容的提问来源于stack exchange，提问作者Vishnunarayanan