Tomcat8 starts web3.1maven project error Could not resolve XML resource [null]

JDK1.7,tomcat8 starts the web3.1maven project to report an error Could not resolve XML resource [null] with public ID
as mentioned! Tomcat7 certainly can not be used, 8 words to report this mistake, inexplicable!

Mar.09,2021
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-64f5-1bed8da-31ba6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bed8da-31ba6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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