我正在尝试使用Spring boot在WebApp中使用ReactiveCrudRepository将数据保存到cassandra。
我收到以下错误：
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is reactor.core.Exceptions$BubblingException: java.util.concurrent.RejectedExecutionException: Scheduler unavailable
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:986) ~[spring-webmvc-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870) ~[spring-webmvc-5.0.0.RC3.jar:5.0.0.RC3]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) ~[javax.servlet-api-3.1.0.jar:3.1.0]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) ~[spring-webmvc-5.0.0.RC3.jar:5.0.0.RC3]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[javax.servlet-api-3.1.0.jar:3.1.0]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:841) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:206) ~[websocket-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at orderfulfilment.filters.OAuth2Filter.doFilter(OAuth2Filter.java:47) ~[classes/:na]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) ~[spring-boot-actuator-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) ~[spring-boot-actuator-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) ~[jetty-security-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) ~[jetty-servlet-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.Server.handle(Server.java:564) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317) ~[jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [jetty-server-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279) [jetty-io-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110) [jetty-io-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124) [jetty-io-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128) [jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222) [jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294) [jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126) [jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673) ~[jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591) ~[jetty-util-9.4.6.v20170531.jar:9.4.6.v20170531]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
我试图以下列方式保存：
Person x = new Person();
x.setFirstname("ABC");
x.setLastname("DEF");
x.setAge(30);
//Way 1 - failed
persistentService.save(x).publishOn(Schedulers.elastic()).subscribe(p -> log.info(p.getFirstname()), e -> log.error("failed", e));
//Way 2 - failed
persistentService.save(x).then().block();
//Way 3 - failed
persistentService.save(x).block();
连接到cassandra没有问题。我成功地能够连接，并且表模式也通过spring数据库在它上面创建。 以下是我的PersistentService的样子[在我试图保留Person对象的控制器中自动装配]：
@Repository
public interface PersistentService extends ReactiveCassandraRepository<Person, String>{
}
我使用以下依赖项来实现此目的：