Some of the elasticsearch search logs can not be found, what is the problem?

1, ES log I search NullPointerException search can not write full java.lang.NullPointerException.

2. Does this have anything to do with participle?

3, log section

-->java.lang.NullPointerException: null    at java.util.Calendar.setTime(Calendar.java:1770)    at org.platform.utils.date.DateUtil.before(DateUtil.java:378)    at org.platform.service.product.stone.service.vitualflight.VirtualFlightImportServiceImpl.checkVirtualFlight(VirtualFlightImportServiceImpl.java:280)
Apr.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-64f5-1b3bf4f-2c2dd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3bf4f-2c2dd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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