一次線上mongo慢查詢問(wèn)題排查處理記錄
發(fā)布日期：2022-07-15 19:17 | 文章來(lái)源：源碼之家
一、簡(jiǎn)單介紹
mongo語(yǔ)句查詢條件中出現(xiàn)null或空串，可能會(huì)導(dǎo)致索引失效，查詢優(yōu)化器無(wú)法選擇正確的查詢計(jì)劃，出現(xiàn)慢查詢引起服務(wù)異常
mongo查詢的執(zhí)行計(jì)劃使用了LRU緩存，在很多種情況下會(huì)失效，導(dǎo)致重新選擇執(zhí)行計(jì)劃并緩存，供后續(xù)同類查詢直接使用；
服務(wù)開(kāi)始時(shí)一直運(yùn)行正常，當(dāng)執(zhí)行計(jì)劃失效后，恰好出現(xiàn)null值的查詢導(dǎo)致選擇了錯(cuò)誤的執(zhí)行計(jì)劃并緩存，后續(xù)正常的查詢也會(huì)出現(xiàn)異常。
二、事件脈絡(luò)
1、起因
用戶中心收到業(yè)務(wù)方反饋，第三方登錄注冊(cè)出現(xiàn)頻繁dubbo調(diào)用超時(shí)。
org.apache.dubbo.rpc.RpcException: Failed to invoke the method loginWithThird in the service weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService. Tried 1 times of the providers [10.65.5.0:11090] (1/4) from the registry node1.zk.all.platform.wtc.hwhosts.com:2181 on the consumer 10.65.1.81 using the dubbo version 2.7.3-SNAPSHOT. Last error is: loginWithThird_2 failed and fallback failed.
at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:113)
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:248)
at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:78)
at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:55)
at org.apache.dubbo.common.bytecode.proxy9.loginWithThird(proxy9.java)
at weli.peanut.user.service.LoginService.loginAndRegister(LoginService.java:684)
at weli.peanut.user.service.LoginService.loginByThirdPartyV2(LoginService.java:629)
at weli.peanut.web.controller.api.UserLoginController.lambda$loginByThirdPartyV2$0(UserLoginController.java:113)
at weli.peanut.common.controller.BaseController.resultForActionWithCat(BaseController.java:71)
at weli.peanut.web.controller.api.UserLoginController.loginByThirdPartyV2(UserLoginController.java:113)
at sun.reflect.GeneratedMethodAccessor2017.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1721)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.netflix.hystrix.exception.HystrixRuntimeException: loginWithThird_2 failed and fallback failed.
at com.netflix.hystrix.AbstractCommand$22.call(AbstractCommand.java:818)
at com.netflix.hystrix.AbstractCommand$22.call(AbstractCommand.java:793)
at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:140)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at com.netflix.hystrix.AbstractCommand$DeprecatedOnFallbackHookApplication$1.onError(AbstractCommand.java:1454)
at com.netflix.hystrix.AbstractCommand$FallbackHookApplication$1.onError(AbstractCommand.java:1379)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:142)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.internal.operators.OperatorSubscribeOn$1$1.onError(OperatorSubscribeOn.java:59)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at com.netflix.hystrix.AbstractCommand$DeprecatedOnRunHookApplication$1.onError(AbstractCommand.java:1413)
at com.netflix.hystrix.AbstractCommand$ExecutionHookApplication$1.onError(AbstractCommand.java:1344)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:44)
at rx.internal.operators.OnSubscribeThrow.call(OnSubscribeThrow.java:28)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10151)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)
at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)
at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction.call(HystrixContexSchedulerAction.java:69)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
... 3 more
Caused by: java.lang.RuntimeException: org.apache.dubbo.rpc.RpcException: Invoke remote method timeout. method: loginWithThird, provider: dubbo://10.65.5.0:11090/weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService?anyhost=true&application=peanut-admin&bean.name=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService&lazy=false&loadbalance=leastactive&methods=logout,sendSms,loginWithVisitor,loginWithThird,loginWithPhone,loginWithThirdBindPhone&pid=1®ister=true®ister.ip=10.65.1.81&release=2.7.3-SNAPSHOT&remote.application=wormhole-api&retries=0&revision=1.1.11-SNAPSHOT&side=consumer&sticky=false&timeout=5000×tamp=1647332146309, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2022-03-15 20:33:31.937, end time: 2022-03-15 20:33:36.968, client elapsed: 0 ms, server elapsed: 5031 ms, timeout: 5000 ms, request: Request [id=690506, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=loginWithThird, parameterTypes=[class weli.wormhole.rpc.user.center.model.LoginWithThirdRequest, class weli.wormhole.rpc.user.center.model.LoginCommonParam], arguments=[LoginWithThirdRequest(accessToken=54_y3n-YsttdKOklr_X-mbjRgKAKROLDKfx3PV23zAQHmBvmT3zVliFp9mWodHSUEcKgNnJGC4AP_bAOX-2ZSSsfCHfNM5wfjbJDyiQh-sCjFQ, openId=ofrsY6xraPjv9augA9L2kUIB0-Fk, unionId=null, code=null, type=WX, nickName=null, headImgurl=null, sex=null, skipPhoneBind=1), LoginCommonParam(channel=vivo, ip=null, verName=null, platform=null, deviceId=null, imei=null, app=peanut, subApp=peanut, dfId=DUE_59hD2L9BBgukNR3Jv2DjnW00iRtU8z0eRFVFXzU5aEQyTDlCQmd1a05SM0p2MkRqblcwMGlSdFU4ejBlc2h1, idfa=null, mac=null, oaid=null, androidId=null)], attachments={path=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, version=0.0.0, timeout=5000}]], channel: /10.65.1.81:35450 -> /10.65.5.0:11090
at suishen.esb.hystrix.dubbo.DubboHystrixCommand.run(DubboHystrixCommand.java:93)
at suishen.esb.hystrix.dubbo.DubboHystrixCommand.run(DubboHystrixCommand.java:12)
at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:301)
at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:297)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
... 26 more
Caused by: org.apache.dubbo.rpc.RpcException: Invoke remote method timeout. method: loginWithThird, provider: dubbo://10.65.5.0:11090/weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService?anyhost=true&application=peanut-admin&bean.name=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService&lazy=false&loadbalance=leastactive&methods=logout,sendSms,loginWithVisitor,loginWithThird,loginWithPhone,loginWithThirdBindPhone&pid=1®ister=true®ister.ip=10.65.1.81&release=2.7.3-SNAPSHOT&remote.application=wormhole-api&retries=0&revision=1.1.11-SNAPSHOT&side=consumer&sticky=false&timeout=5000×tamp=1647332146309, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2022-03-15 20:33:31.937, end time: 2022-03-15 20:33:36.968, client elapsed: 0 ms, server elapsed: 5031 ms, timeout: 5000 ms, request: Request [id=690506, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=loginWithThird, parameterTypes=[class weli.wormhole.rpc.user.center.model.LoginWithThirdRequest, class weli.wormhole.rpc.user.center.model.LoginCommonParam], arguments=[LoginWithThirdRequest(accessToken=54_y3n-YsttdKOklr_X-mbjRgKAKROLDKfx3PV23zAQHmBvmT3zVliFp9mWodHSUEcKgNnJGC4AP_bAOX-2ZSSsfCHfNM5wfjbJDyiQh-sCjFQ, openId=ofrsY6xraPjv9augA9L2kUIB0-Fk, unionId=null, code=null, type=WX, nickName=null, headImgurl=null, sex=null, skipPhoneBind=1), LoginCommonParam(channel=vivo, ip=null, verName=null, platform=null, deviceId=null, imei=null, app=peanut, subApp=peanut, dfId=DUE_59hD2L9BBgukNR3Jv2DjnW00iRtU8z0eRFVFXzU5aEQyTDlCQmd1a05SM0p2MkRqblcwMGlSdFU4ejBlc2h1, idfa=null, mac=null, oaid=null, androidId=null)], attachments={path=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, version=0.0.0, timeout=5000}]], channel: /10.65.1.81:35450 -> /10.65.5.0:11090
at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:63)
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78)
at com.alibaba.dubbo.rpc.Invoker$CompatibleInvoker.invoke(Invoker.java:55)
at suishen.esb.hystrix.dubbo.DubboHystrixCommand.run(DubboHystrixCommand.java:84)
... 30 more
Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2022-03-15 20:33:31.937, end time: 2022-03-15 20:33:36.968, client elapsed: 0 ms, server elapsed: 5031 ms, timeout: 5000 ms, request: Request [id=690506, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=loginWithThird, parameterTypes=[class weli.wormhole.rpc.user.center.model.LoginWithThirdRequest, class weli.wormhole.rpc.user.center.model.LoginCommonParam], arguments=[LoginWithThirdRequest(accessToken=54_y3n-YsttdKOklr_X-mbjRgKAKROLDKfx3PV23zAQHmBvmT3zVliFp9mWodHSUEcKgNnJGC4AP_bAOX-2ZSSsfCHfNM5wfjbJDyiQh-sCjFQ, openId=ofrsY6xraPjv9augA9L2kUIB0-Fk, unionId=null, code=null, type=WX, nickName=null, headImgurl=null, sex=null, skipPhoneBind=1), LoginCommonParam(channel=vivo, ip=null, verName=null, platform=null, deviceId=null, imei=null, app=peanut, subApp=peanut, dfId=DUE_59hD2L9BBgukNR3Jv2DjnW00iRtU8z0eRFVFXzU5aEQyTDlCQmd1a05SM0p2MkRqblcwMGlSdFU4ejBlc2h1, idfa=null, mac=null, oaid=null, androidId=null)], attachments={path=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, version=0.0.0, timeout=5000}]], channel: /10.65.1.81:35450 -> /10.65.5.0:11090
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:56)
... 33 more
Caused by: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2022-03-15 20:33:31.937, end time: 2022-03-15 20:33:36.968, client elapsed: 0 ms, server elapsed: 5031 ms, timeout: 5000 ms, request: Request [id=690506, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=loginWithThird, parameterTypes=[class weli.wormhole.rpc.user.center.model.LoginWithThirdRequest, class weli.wormhole.rpc.user.center.model.LoginCommonParam], arguments=[LoginWithThirdRequest(accessToken=54_y3n-YsttdKOklr_X-mbjRgKAKROLDKfx3PV23zAQHmBvmT3zVliFp9mWodHSUEcKgNnJGC4AP_bAOX-2ZSSsfCHfNM5wfjbJDyiQh-sCjFQ, openId=ofrsY6xraPjv9augA9L2kUIB0-Fk, unionId=null, code=null, type=WX, nickName=null, headImgurl=null, sex=null, skipPhoneBind=1), LoginCommonParam(channel=vivo, ip=null, verName=null, platform=null, deviceId=null, imei=null, app=peanut, subApp=peanut, dfId=DUE_59hD2L9BBgukNR3Jv2DjnW00iRtU8z0eRFVFXzU5aEQyTDlCQmd1a05SM0p2MkRqblcwMGlSdFU4ejBlc2h1, idfa=null, mac=null, oaid=null, androidId=null)], attachments={path=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, interface=weli.wormhole.rpc.user.center.api.ILoginNeedPhoneService, version=0.0.0, timeout=5000}]], channel: /10.65.1.81:35450 -> /10.65.5.0:11090
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:189)
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:153)
at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.run(DefaultFuture.java:252)
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:648)
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:727)
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:449)
... 1 more
2、排查處理
a、查詢用戶中心cat監(jiān)控，確認(rèn)用戶中心是否收到請(qǐng)求且正常響應(yīng)。
當(dāng)前狀態(tài)：
正常狀態(tài)：
對(duì)比結(jié)果：
用戶中心已收到正常請(qǐng)求，排除客戶端調(diào)用問(wèn)題；
用戶中心當(dāng)前響應(yīng)時(shí)間異常高出平常的響應(yīng)時(shí)間，判斷為用戶中心內(nèi)部業(yè)務(wù)處理出現(xiàn)問(wèn)題。
b、查看kibana日志，發(fā)現(xiàn)無(wú)異常日志；
c、使用Arthas診斷工具，監(jiān)控業(yè)務(wù)調(diào)用鏈各部分耗時(shí)情況；
定位原因?yàn)閙ongo查詢慢導(dǎo)致整體業(yè)務(wù)處理超時(shí)。
d、分析mongo查詢語(yǔ)句，查看索引情況
public User getUserByDfId(String dfId, String app) {
Criteria criteria = Criteria.where("userBindInfo.dfId").is(dfId).and("app").is(app).and("status").is(1);
return this.mongoTemplate.findOne(Query.query(criteria), User.class);
}
db.getCollection('wormhole_user').getIndexes();
[
{
"v" : 1,
"key" : {
"app" : 1
},
"name" : "app",
"ns" : "wormhole.wormhole_user",
"background" : true
},
{
"v" : 1,
"key" : {
"userBindInfo.dfId" : 1
},
"name" : "userBindInfo.dfId",
"ns" : "wormhole.wormhole_user",
"background" : true
},
... (其余不關(guān)注索引已刪除)
]
“userBindInfo.dfId”字段存在索引，查詢語(yǔ)句也無(wú)明顯異常。
e、查看華為云后臺(tái)mongo慢日志
{
"op": "query",
"ns": "wormhole.wormhole_user",
"command": {
"find": "wormhole_user",
"filter": {
"userBindInfo.dfId": "DUQmN3QLpLRwC8PNe1joT_9SDRrzazT4cUc5RFVRbU4zUUxwTFJ3QzhQTmUxam9UXzlTRFJyemF6VDRjVWM1c2h1",
"app": "maybe",
"status": 1
},
"ntoreturn": -1
},
"keysExamined": 1870039,
"docsExamined": 1870039,
"cursorExhausted": true,
"numYield": 14836,
"nreturned": 0,
"locks": {
"Global": {
"acquireCou
通過(guò)慢日志發(fā)現(xiàn)，mongo并未使用“userBindInfo.dfId”作為索引查詢條件，而是使用了“app”作為索引查詢條件。
初步認(rèn)為索引匹配度不夠，mongo沒(méi)正確使用索引。
f、新增聯(lián)合索引，提高索引匹配度，查詢時(shí)間恢復(fù)正常，接口恢復(fù)正常。
db.getCollection("wormhole_user").createIndex({
"userBindInfo.dfId": 1,
"app": 1,
"status": 1
}, {
name: "idx_user_app_userBindInfo.dfId",
background: true
});
3、問(wèn)題分析
a、explain()語(yǔ)句分析
db.getCollection('wormhole_user').find({"userBindInfo.dfId": "DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1", "app": "maybe", "status": 1}).explain();
{
"queryPlanner" : {
"plannerVersion" : 1,
"namespace" : "wormhole.wormhole_user",
"indexFilterSet" : false,
"parsedQuery" : {
"$and" : [
{
"app" : {"$eq" : "maybe"
}
},
{
"status" : {"$eq" : 1.0
}
},
{
"userBindInfo.dfId" : {"$eq" : "DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1"
}
}
]
},
"winningPlan" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{"app" : {
"$eq" : "maybe"}
},
{"status" : {
"$eq" : 1.0}
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"userBindInfo.dfId" : 1
},
"indexName" : "userBindInfo.dfId",
"isMultiKey" : false,
"multiKeyPaths" : {
"userBindInfo.dfId" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"userBindInfo.dfId" : [ "[\"DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1\", \"DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1\"]"
]
}
}
},
"rejectedPlans" : [
{
"stage" : "FETCH",
"filter" : {
"$and" : [ {
"status" : {
"$eq" : 1.0
}}, {
"userBindInfo.dfId" : {
"$eq" : "DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1"
}}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {"app" : 1
},
"indexName" : "app",
"isMultiKey" : false,
"multiKeyPaths" : {"app" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {"app" : [
"[\"maybe\", \"maybe\"]"]
}
}
},
{
"stage" : "FETCH",
"filter" : {
"$and" : [ {
"app" : {
"$eq" : "maybe"
}}, {
"userBindInfo.dfId" : {
"$eq" : "DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1"
}}, {
"status" : {
"$eq" : 1.0
}}
]
},
"inputStage" : {
"stage" : "AND_SORTED",
"inputStages" : [ {
"stage" : "IXSCAN",
"keyPattern" : {
"app" : 1
},
"indexName" : "app",
"isMultiKey" : false,
"multiKeyPaths" : {
"app" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"app" : [
"[\"maybe\", \"maybe\"]"
]
}}, {
"stage" : "IXSCAN",
"keyPattern" : {
"userBindInfo.dfId" : 1
},
"indexName" : "userBindInfo.dfId",
"isMultiKey" : false,
"multiKeyPaths" : {
"userBindInfo.dfId" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"userBindInfo.dfId" : [
"[\"DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1\", \"DUqTmV8lQcInjzWtuyJuAntkbRi5_YZ3yHd9RFVxVG1WOGxRY0luanpXdHV5SnVBbnRrYlJpNV9ZWjN5SGQ5c2h1\"]"
]
}}
]
}
}
]
},
"serverInfo" : {
"host" : "host-192-168-10-163",
"port" : 27017,
"version" : "4.0.3",
"gitVersion" : "0ead8608f9d151a199b05117bcc79ccb8d5f44a0"
},
"ok" : 1.0,
"operationTime" : Timestamp(1647486920, 2),
"$clusterTime" : {
"clusterTime" : Timestamp(1647486920, 2),
"signature" : {
"hash" : { "$binary" : "ylTAtLK6mVpNwDt7PTGwNST/9z4=", "$type" : "00" },
"keyId" : NumberLong(7031512438860152835)
}
}
}
- 發(fā)現(xiàn)mongo執(zhí)行計(jì)劃選擇正確，這正好解釋了服務(wù)在之前很長(zhǎng)的一段時(shí)間內(nèi)都是正常的原因；
- mongo慢日志中的執(zhí)行計(jì)劃卻選擇錯(cuò)誤，表明有什么原因?qū)е铝薽ongo執(zhí)行計(jì)劃的選擇發(fā)生了變更。
b、文檔查詢
- MongoDB 查詢優(yōu)化器會(huì)緩存最有效的查詢計(jì)劃，關(guān)聯(lián)的計(jì)劃緩存條目會(huì)用于具有相同查詢形狀的后續(xù)查詢；
- 計(jì)劃緩存會(huì)出現(xiàn)刷新：
- MongoDB重啟；
- 索引或者集合的刪除添加更新等操作；
- 最近最少使用 (LRU) 緩存替換機(jī)制清除最近最少訪問(wèn)的緩存條目。
結(jié)論：之前使用了計(jì)劃緩存服務(wù)正常，到了某一時(shí)刻，計(jì)劃緩存失效，MongoDB重新選擇計(jì)劃，此時(shí)選擇了錯(cuò)誤的計(jì)劃并緩存，導(dǎo)致后續(xù)查詢?nèi)砍霈F(xiàn)問(wèn)題
c、查詢首次出現(xiàn)的慢日志
{
"op":"query",
"ns":"wormhole.wormhole_user",
"command":{
"find":"wormhole_user",
"filter":{
"userBindInfo.dfId":null,
"app":"cybercat",
"status":1
},
"ntoreturn":-1
},
"keysExamined":872550,
"docsExamined":872550,
"fromMultiPlanner":true,
"replanned":true,
"cursorExhausted":true,
"numYield":13785,
"nreturned":0,
"locks":{
"Global":{
"acquireCou
發(fā)現(xiàn)查詢條件中出現(xiàn)了null值，本地再次分析：
db.getCollection('wormhole_user').find({"userBindInfo.dfId": null, "app": "maybe", "status": 1}).explain();
{
"queryPlanner" : {
"plannerVersion" : 1,
"namespace" : "wormhole.wormhole_user",
"indexFilterSet" : false,
"parsedQuery" : {
"$and" : [
{
"app" : {"$eq" : "maybe"
}
},
{
"status" : {"$eq" : 1.0
}
},
{
"userBindInfo.dfId" : {"$eq" : null
}
}
]
},
"winningPlan" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{"status" : {
"$eq" : 1.0}
},
{"userBindInfo.dfId" : {
"$eq" : null}
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"app" : 1
},
"indexName" : "app",
"isMultiKey" : false,
"multiKeyPaths" : {
"app" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"app" : [ "[\"maybe\", \"maybe\"]"
]
}
}
},
"rejectedPlans" : [
{
"stage" : "FETCH",
"filter" : {
"$and" : [ {
"userBindInfo.dfId" : {
"$eq" : null
}}, {
"app" : {
"$eq" : "maybe"
}}, {
"status" : {
"$eq" : 1.0
}}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {"userBindInfo.dfId" : 1
},
"indexName" : "userBindInfo.dfId",
"isMultiKey" : false,
"multiKeyPaths" : {"userBindInfo.dfId" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {"userBindInfo.dfId" : [
"[undefined, undefined]",
"[null, null]"]
}
}
}
]
},
"serverInfo" : {
"host" : "host-192-168-10-163",
"port" : 27017,
"version" : "4.0.3",
"gitVersion" : "0ead8608f9d151a199b05117bcc79ccb8d5f44a0"
},
"ok" : 1.0,
"operationTime" : Timestamp(1647489666, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1647489666, 1),
"signature" : {
"hash" : { "$binary" : "1KJI3aoz2QbOwTKlbkNl9SmWLzw=", "$type" : "00" },
"keyId" : NumberLong(7031512438860152835)
}
}
}
結(jié)果與線上表現(xiàn)一致
4、回顧
緊急處理時(shí)，直接創(chuàng)建了一個(gè)新的索引，導(dǎo)致了計(jì)劃緩存失效，重新選擇計(jì)劃并緩存，所以服務(wù)恢復(fù)了正常。
三、總結(jié)
- 避免空值的查詢；
- 盡可能的使用explain()分析各種不同的查詢情況；
- 可以使用mongo提供的PlanCache相關(guān)功能，查看計(jì)劃緩存情況；
- 可使用hint()推薦查詢索引。
到此這篇關(guān)于一次線上mongo慢查詢問(wèn)題排查處理的文章就介紹到這了,更多相關(guān)mongo慢查詢問(wèn)題排查內(nèi)容請(qǐng)搜索本站以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持本站！
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