我们在研究项目中使用了GraphDB Free，最近在将数据插入到上下文中时遇到了响应性问题。
当我使用RDF4J API将语句插入到新上下文中时，GraphDB无法响应后续的请求/查询。日志中未报告任何异常。我认为这与两个并发查询的限制有关。
有趣的是，当我在工作台中通过SPARQL INSERT创建上下文时，使用新上下文的后续工作似乎没有问题。但是，如果新上下文是通过RDF4J连接插入语句创建的，则GraphDB通常会卡住。当我插入默认上下文时，不会出现此类问题。
这是我在GraphDB进程上运行 jstack 所获得的堆栈跟踪：
"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/提示将不胜感激。
答案 0 :(得分：0)
能否提供更多详细信息，您是如何插入这些语句的？我使用GraphDB 8.8.1进行了简单的测试，但无法重现该问题。这就是我要做的：
curl -X POST -d @wines.ttl -H "Content-Type: application/x-turtle" http://localhost:7200/repositories/test/rdf-graphs/service?graph=http://example.com
我对不同的文件进行了多次插入，但无法解决有问题的行为