java - 在 Windows 10 上运行时出现 Blazegraph 错误

Question

无法运行 Blazegraph (Java RDF 三重存储)在 Windows 10 上使用 simple steps从下载页面。

我有一台安装了 Java JDK 9 的 Windows 10 机器(参见下面的版本检查)。我 downloaded最新的 Blazegraph 可执行文件 jar，然后运行“java -server -Xmx4g -jar blazegraph.jar”。它报告 NullPointerException，如下所示。如果有帮助，下面的错误引用 StandaloneNanoSparqlServer.java:142 ，github 显示为 "System.setProperty("jetty.home", jettyXml.getClass().getResource("/war").toExternalForm());".

Windows 管理员 CMD 提示符下的命令/响应:

C:\Users\aidesigner\Downloads\Blazegraph>dir
11/26/2017 09:48 PM 56,702,395 blazegraph.jar
11/26/2017 09:06 PM 0 rules.log

C:\Users\aidesigner\Downloads\Blazegraph>java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

C:\Users\aidesigner\Downloads\Blazegraph>java -server -Xmx4g -jar blazegraph.jar
INFO: com.bigdata.util.config.LogUtil: Configure: jar:file:/C:/Users/aidesigner/Downloads/Blazegraph/blazegraph.jar!/log4j.properties
WARN : SystemUtil.java:71: No CPUParser for this platform - looking for class: [org.apache.system.Windows10]

BlazeGraph(TM) Graph Engine

Flexible
Reliable
Affordable
Web-Scale Computing for the Enterprise
Copyright SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
developer-pc.home
Sun Nov 26 21:08:03 CST 2017
Windows 10/10.0 amd64
amd64 Family n, Model n, Stepping n, Undeterminable #CPU=1
Oracle Corporation 9
freeMemory=521142272
buildVersion=2.1.1
gitCommit=90d9e8232969a8afdc830e856643e5416bb50d0a

// <Displays about 20 license links>

ERROR: Banner.java:160: Uncaught exception in thread
java.lang.NullPointerException
at com.bigdata.rdf.sail.webapp.StandaloneNanoSparqlServer.main(StandaloneNanoSparqlServer.java:142)

Answer 1

应该是jre兼容性问题。我在 jre 9 上遇到了同样的问题，切换回 jre 7 解决了 NPE。