Caused by: java.lang.IllegalStateException: Cannot create a session after the response has been committed

        at org.apache.catalina.connector.Request.doGetSession(Request.java:3058) ~[catalina.jar:7.0.73]         at org.apache.catalina.connector.Request.getSession(Request.java:2430) ~[catalina.jar:7.0.73]         at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897) ~[catalina.jar:7.0.73]

检查代码中的处理session的代码是不是放在了response输出之后了。

request.getSession(true).setAttribute(sessionKey, randomString);

response.setHeader("Pragma", "No-cache");

response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); response.setContentType("image/jpeg");

奇怪的是开发windows环境tomcat7无问题，而发布到linux下有问题。环境如下 ：

C:\Users\admin>java -version

java version "1.7.0_79" Java(TM) SE Runtime Environment (build 1.7.0_79-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

Server version: Apache Tomcat/7.0.75

Server built:   Jan 18 2017 20:54:42 UTC Server number:  7.0.75.0 OS Name:        Windows 8.1 OS Version:     6.3 Architecture:   amd64 JVM Version:    1.7.0_79-b15 JVM Vendor:     Oracle Corporation

#  java -version

java version "1.7.0_75" Java(TM) SE Runtime Environment (build 1.7.0_75-b13) Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

Server version: Apache Tomcat/7.0.73

Server built:   Nov 7 2016 21:27:23 UTC Server number:  7.0.73.0 OS Name:        Linux OS Version:     2.6.32-431.23.3.el6.x86_64 Architecture:   amd64 JVM Version:    1.7.0_75-b13 JVM Vendor:     Oracle Corporation