很长的启动时间-- GraphDB 8.7.2

Question

在启动graphdb时，日志报告了一些与org.springframework.cglib.core.ReflectUtils在lib/spring-core-5.0.4.RELEASE.jar中的非法反射访问操作相关的警告，然后在：

[INFO ] 2018-11-19 17:02:34,109 [main | c.o.g.Config] Using 'file:/home/ubuntu/graphdb-free-8.7.2/conf/logback.xml' as logback's configuration file for graphdb
[INFO ] 2018-11-19 17:02:34,427 [main | c.o.g.s.GraphDB] Starting GraphDB in workbench mode.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/home/ubuntu/graphdb-free-8.7.2/lib/spring-core-5.0.4.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO ] 2018-11-19 17:02:39,572 [main | c.o.g.Config] GraphDB Home directory: /home/ubuntu/graphdb-free-8.7.2
[INFO ] 2018-11-19 17:02:39,572 [main | c.o.g.Config] GraphDB Config directory: /home/ubuntu/graphdb-free-8.7.2/conf
[INFO ] 2018-11-19 17:02:39,573 [main | c.o.g.Config] GraphDB Data directory: /home/ubuntu/graphdb-free-8.7.2/data
[INFO ] 2018-11-19 17:02:39,573 [main | c.o.g.Config] GraphDB Work directory: /home/ubuntu/graphdb-free-8.7.2/work
[INFO ] 2018-11-19 17:02:39,573 [main | c.o.g.Config] GraphDB Logs directory: /home/ubuntu/graphdb-free-8.7.2/logs

大约8-13分钟后，日志报告一个会话ID生成过程完成，并部署服务器：

[WARN ] 2018-11-19 16:38:41,843 [main | o.a.c.u.SessionIdGeneratorBase] Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [784,201] milliseconds.

跑步：

• graphdb-free-8.7.2
• Ubuntu 18.04.1 LTS
• openjdk版本"10.0.2“2018-07-17，OpenJDK运行时环境(build 10.0.2+13-Ubuntu-1ubuntu0.18.04.3)，OpenJDK 64位服务器VM (Build10.0.2+13-Ubuntu0.18.04.3，混合模式)

有必要花这么多时间吗？或者，能关掉它吗？

谢谢!

Answer 1

您可以安全地忽略使用Java 9运行数据库所导致的第一条警告消息。新的模块封装系统会导致此警告。见what is an illegal reflective access。

由于一些未知的原因，ApacheTomcat9.0.4代码库无法生成随机ID，正如Slow startup on Tomcat 7.0.57 because of SecureRandom中所建议的那样，您应该使用./graphdb -Djava.security.egd=file:/dev/./urandom启动数据库，或者在$GDB_HOME/bin/graphdb.in.sh中添加行：JAVA_OPTS_ARRAY+=("-Djava.security.egd=file:/dev/./urandom")。