Clientabortexception: Java. Io. ioexception
At org. Apache. Catalina. connector. outputbuffer. realwritebytes (outputbuffer. Java: 369)
At org. Apache. tomcat. util. Buf. bytechunk. flushbuffer (bytechunk. Java: 448)
At org. Apache. Catalina. connector. outputbuffer. doflush (outputbuffer. Java: 318)
At org. Apache. Catalina. connector. outputbuffer. Flush (outputbuffer. Java: 296)
At org. Apache. Catalina. connector. coyoteoutputstream. Flush (coyoteoutputstream. Java: 98)
At com. sencloud. DH. Core. Web. servlet. openclassroomexcelservlet. doget (openclassroomexcelservlet. Java: 79)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 617)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 717)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 290)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. springframework. Orm. hibernate3.support. opensessioninviewfilter. dofilterinternal (opensessioninviewfilter. Java: 198)
At org. springframework. Web. Filter. onceperrequestfilter. dofilter (onceperrequestfilter. Java: 76)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 235)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. springframework. Orm. hibernate3.support. opensessioninviewfilter. dofilterinternal (opensessioninviewfilter. Java: 198)
At org. springframework. Web. Filter. onceperrequestfilter. dofilter (onceperrequestfilter. Java: 76)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 235)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. Apache. Catalina. Core. standardwrappervalve. Invoke (standardwrappervalve. Java: 233)
At org. Apache. Catalina. Core. standardcontextvalve. Invoke (standardcontextvalve. Java: 191)
At org. Apache. Catalina. Core. standardhostvalve. Invoke (standardhostvalve. Java: 127)
At org. Apache. Catalina. Valves. errorreportvalve. Invoke (errorreportvalve. Java: 103)
At org. Apache. Catalina. Core. standardenginevalve. Invoke (standardenginevalve. Java: 109)
At org. Apache. Catalina. connector. coyoteadapter. Service (coyoteadapter. Java: 293)
At org. Apache. Coyote. http11.http11aprprocessor. Process (http11aprprocessor. Java: 879)
At org. Apache. Coyote. http11.http11aprprotocol $ http11connectionhandler. Process (http11aprprotocol. Java: 600)
At org.apache.tomcat.util.net. aprendpoint $ worker. Run (aprendpoint. Java: 1703)
At java. Lang. thread. Run (thread. Java: 662)
Caused by: Java. Io. ioexception
At org. Apache. Coyote. http11.internalaproutputbuffer. flushbuffer (internalaproutputbuffer. Java: 712)
At org. Apache. Coyote. http11.internalaproutputbuffer $ socketoutputbuffer. dowrite (internalaproutputbuffer. Java: 742)
At org. Apache. Coyote. http11.filters. chunkedoutputfilter. dowrite (chunkedoutputfilter. Java: 124)
At org. Apache. Coyote. http11.internalaproutputbuffer. dowrite (internalaproutputbuffer. Java: 552)
At org. Apache. Coyote. response. dowrite (response. Java: 560)
At org. Apache. Catalina. connector. outputbuffer. realwritebytes (outputbuffer. Java: 364)
... 27 more