SpringBoot project, deployed on linux, request.getHeader ("SESSION_ID") has been unable to get a value

SpringBoot project, deployed on linux, request.getHeader ("SESSION_ID") has been unable to get a value.

but the same code works fine with eclipse under windows. Why?

Centos7 springboot
Mar.05,2021

should be a problem with nginx. By default, header names cannot be underlined. Either modify the nginx configuration to allow header to be underlined, or change it to SESSION-ID.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e500cb-4d419.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e500cb-4d419.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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