在Windows 10上运行时出现java Blazegraph错误

Question

无法在Windows 10上使用下载页面中的simple steps运行Blazegraph（Java RDF三重存储）

我有一台安装了Java JDK 9的windows 10机器（请参阅下面的版本检查）。我使用最新的Blazegraph可执行jar，然后运行“java-server-Xmx4g-jar Blazegraph.jar”。它报告一个NullPointerException，如下所示。如果有帮助的话，下面的错误引用了StandaloneNanoSparqlServer.java:142，github显示的是"System.setProperty("jetty.home", jettyXml.getClass().getResource("/war").toExternalForm());".

在Windows管理命令提示符下的命令/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

这可能是一个jre兼容性问题。我对jre 9也有同样的问题，切换回jre 7解决了NPE