接收component_verify_ticket时，偶尔会发生读取数据错误是什么原因？
@RequestMapping(value = "/getComponentVerifyTicket")
public String getComponentVerifyTicket(HttpServletRequest request, HttpServletResponse response) throws Exception {
log.info("接收component_verify_ticket 或 authorized事件");
String nonce = request.getParameter("nonce");
String timestamp = request.getParameter("timestamp");
String msgSignature = request.getParameter("msg_signature");
StringBuilder sb = new StringBuilder();
BufferedReader in = request.getReader();
String line;
while ((line = in.readLine()) != null) {
sb.append(line);
}
String postData = sb.toString();
log.info("nonce: " + nonce);
log.info("timestamp: " + timestamp);
log.info("msgSignature: " + msgSignature);
log.info("postData: " + postData);
authService.handleAuthEvent(timestamp, nonce, msgSignature,postData);
return "success";
}
获取的postData偶尔会为 [Fatal Error] :-1:-1: Premature end of file. 请问这是什么原因？代码一直没有修改过，但是每天都会有几次接收到的请求是这样的，从而导致数据报错
