GraphDB 8.8.1 Free卡滞

Question

我们在我们的研究项目中使用了GraphDB Free，我最近遇到了一个在将数据插入上下文时响应性的问题。

当我使用RDF4J应用编程接口将语句插入到新的上下文中时，GraphDB无法响应后续的请求/查询。日志中没有报告异常。我假设这与限制两个并发查询有关。

有趣的是，当我在workbench中通过SPARQL插入创建上下文时，后续处理新上下文似乎没有问题。但是，如果通过RDF4J连接插入语句来创建新的上下文，GraphDB通常会卡住。当我插入默认上下文时，不会出现这样的问题。

下面是我在GraphDB进程上运行jstack得到的stacktrace：

"repositories/termit" #16 daemon prio=5 os_prio=0 tid=0x00007f6481ca0000 nid=0x3c17 waiting on condition [0x00007f645ae9a000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000006c8e90748> (a java.util.concurrent.Semaphore$NonfairSync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
    at java.util.concurrent.Semaphore.acquire(Semaphore.java:312)
    at com.ontotext.trree.GraphdbFreeConnection.<init>(GraphdbFreeConnection.java:15)
    at com.ontotext.trree.OwlimSchemaRepository.getOwlimConnection(OwlimSchemaRepository.java:517)
    at com.ontotext.trree.SailConnectionImpl.getStatementsInternal(SailConnectionImpl.java:316)
    at com.ontotext.trree.SailConnectionImpl.getStatements(SailConnectionImpl.java:2346)
    at org.eclipse.rdf4j.repository.sail.SailRepositoryConnection.getStatements(SailRepositoryConnection.java:296)
    at org.eclipse.rdf4j.repository.sail.SailRepositoryConnection.exportStatements(SailRepositoryConnection.java:331)
    at org.eclipse.rdf4j.http.server.repository.statements.ExportStatementsView.render(ExportStatementsView.java:108)
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1325)
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.ontotext.forest.core.request.RequestFilter.doFilterInternal(RequestFilter.java:41)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.github.ziplet.filter.compression.CompressingFilter.doFilter(CompressingFilter.java:263)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.ontotext.forest.security.AdminDelegatingFilterProxy.doFilter(AdminDelegatingFilterProxy.java:38)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:417)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    - locked <0x00000007b8102798> (a org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

在GraphDB 8.6和最新的8.8.1上进行了尝试。任何帮助/提示都将不胜感激。

Answer 1

你能提供更多细节吗？你是如何插入这些陈述的？我用GraphDB 8.8.1做了一个简单的测试，但我无法重现这个问题。我就是这么做的：

curl -X POST -d @wines.ttl -H "Content-Type: application/x-turtle" http://localhost:7200/repositories/test/rdf-graphs/service?graph=http://example.com

我用不同的文件做了多次插入，但我无法找到有问题的行为