johnnygo920 opened a new pull request #3199:
URL: https://github.com/apache/incubator-dolphinscheduler/pull/3199
## Brief change log
- *Set the system property of "mail.mime.splitlongparameters" is false in
the class "org.apache.dolphinscheduler.alert.utils.MailUtils"*
## Verify this pull request
This pull request is already covered by existing tests.
- *Manually verified the change by testing locally.*
local test method :
org.apache.dolphinscheduler.alert.utils.MailUtilsTest#testSendMails
situation one: Chinese 100. result: success

situation two: Chinese 100 + English 100. result: success

other situation: Whether I set this property or not, and whether the name
contains Chinese or not.when the length of attachment is too long, the mail
will send failed. ( i have been test the situation that the length is 500, but
i'm not sure the max length,because the exception is thrown by a native method)
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