上个月底，邮箱每到中午都会收到告警邮件，内容如下：

logLevel = "ERROR" AND 
(message CONTAIN "java.lang.StackOverflowError" OR 
message CONTAIN "java.lang.OutOfMemoryError") 

        既然每天都那么准点，大概率是定时任务导致的了，很轻松就找到了每天中午12点开始跑的定时任务。但是问题代码出现在哪里呢？模拟了同样的入参，去调用该接口，可是无法重现该错误。而打印的日志是不完整的，如下：

org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.StackOverflowErrorat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:94)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at com.vipshop.mercury.client.filter.MercuryTraceFilter.doFilter(MercuryTraceFilter.java:166)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:209)at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:128)at org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:66)at org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:103)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:121)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)at de.javakaffee.web.msm.RequestTrackingContextValve.invoke(RequestTrackingContextValve.java:99)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)at de.javakaffee.web.msm.RequestTrackingHostValve.invoke(RequestTrackingHostValve.java:157)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)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)
Caused by: java.lang.StackOverflowError: nullat java.lang.ReflectiveOperationException.<init>(ReflectiveOperationException.java:89)at java.lang.reflect.InvocationTargetException.<init>(InvocationTargetException.java:72)at sun.reflect.GeneratedMethodAccessor1710.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at com.alibaba.fastjson.util.FieldInfo.get(FieldInfo.java:544)at com.alibaba.fastjson.serializer.FieldSerializer.getPropertyValue(FieldSerializer.java:153)at com.alibaba.fastjson.serializer.JavaBeanSerializer.getFieldValuesMap(JavaBeanSerializer.java:797)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1106)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)at com.alibaba.fastjson.JSON.toJSON(JSON.java:1108)

        请教了同事，了解到JVM有个参数可以控制StackOverflowError错误日志的行数打印——MaxJavaStackTraceDepth 。配置 -XX:MaxJavaStackTraceDepth=-1 以后，第二天再次出现该错误时，可以准确定位到出现错误的代码行数，代码如下：

log.error("批量保存es数据存在不成功的情况，不成功的item:{}", JSON.toJSON(item));

        猜测是调用es保存接口失败后，返回的对象有循环引用，导致了StackOverflowError的出现，具体错误很难模拟，也就没继续探究根本原因，因此只是改为 JSON.toJSONString() 方法：

log.error("批量保存es数据存在不成功的情况，不成功的item:{}", JSON.toJSONString(item));

        注：项目中此时使用的fastjson版本号为 1.2.70

参考链接：

       JVM MaxJavaStackTraceDepth 参数详解 | HeapDump性能社区

       ​​​​​​【避坑】FastJson稍微使用不当就会导致StackOverflow_凡是过往，皆为序章-CSDN博客_fastjson stackoverflowerror

        fastjson序列化出现StackOverflowError - JavaShuo 

        fastjson 相互引用的类实例，调用toJSON报堆栈溢出_大数据知识库

        相互引用的类实例，调用toJSON报堆栈溢出 · Issue #2915 · alibaba/fastjson · GitHub

        Json序列化时重复引用、循环引用的问题 - 代码先锋网

        生成json串的时候栈溢出的解决_小希一夏的博客-CSDN博客_jackson 栈溢出

        fastjson序列化出现StackOverflowError - buguge - 博客园

fasterxml 循环引用导致StackOverflowError线程栈错误_|] 大世界，小人物-CSDN博客