Why does the jsp page become zero every minute after it is submitted with a form?

<input type="text" class="input" id="start" style="width: 200px;" name="start" readonly="readonly" value="<fmt:formatDate value="${activity.start}" pattern="yyyy-MM-dd HH:mm:ss"/>" validate="required" data-requiredmsg="" onfocus="WdatePicker({maxDate:"-sharpF{$dp.$D(\"end\")}",dateFmt:"yyyy-MM-dd HH:mm:ss"})"/>
Mar.02,2021
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-64f5-1e46688-4368c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e46688-4368c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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