I’m facing the same timeout issue as well on couchbase server 4.1; java-client 2.3.1; core-io 1.3.1; So far in my testing the first few queries work fine and then after about 20 minutes I start getting all timeouts. This started happening after going from java-client 2.2.2 to 2.3.1.
here is my logs as you can see the issue is happening in the same method others have mentioned blockForSingle is there any suggestions on how to avoid what sounds like a race condition?
java.lang.Thread.run(Thread.java:745)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:293)
org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:50)
org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.Server.handle(Server.java:349)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:117)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:483)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:70)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:480)
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:201)
javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:150)
org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:225)
org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:130)
org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:194)
org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:214)
org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:237)
org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:262)
org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:94)
org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:89)
org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:168)
org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:180)
java.lang.reflect.Method.invoke(Method.java:498)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
sun.reflect.GeneratedMethodAccessor898.invoke(Unknown Source)
xxx.xxx.xxx.mymethod(myclass.java:106)
xxxx.xxx.xxx.mymethod(myclass.java:38)
com.sun.proxy.$Proxy169.mymethod(Unknown Source)
org.apache.aries.proxy.impl.ProxyHandler.invoke(ProxyHandler.java:78)
org.apache.aries.proxy.impl.DefaultWrapper.invoke(DefaultWrapper.java:31)
org.apache.aries.proxy.impl.ProxyHandler$1.invoke(ProxyHandler.java:50)
java.lang.reflect.Method.invoke(Method.java:498)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
sun.reflect.GeneratedMethodAccessor899.invoke(Unknown Source)
xxxx.xx.xxx.mymethod(myclass.java:53)
xxx.xxx.xxx.mymethod(myclass.java:72)
xxx.xx.xxx.mymethod(myclass.java:91)
com.couchbase.client.java.CouchbaseBucket.query(CouchbaseBucket.java:577)
com.couchbase.client.java.CouchbaseBucket.query(CouchbaseBucket.java:652)
com.couchbase.client.java.util.Blocking.blockForSingle(Blocking.java:70)
java.util.concurrent.CountDownLatch.await(CountDownLatch.java:277)
java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireSharedNanos(AbstractQueuedSynchronizer.java:1328)
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedNanos(AbstractQueuedSynchronizer.java:1037)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
sun.misc.Unsafe.park(Native Method)