Error in mongodb configuring SSL

configure ssl for MongoDB:

net:
  port: 27017
  bindIp: 127.0.0.1
  ssl:
    mode: requireSSL
      PEMKeyFile: /etc/ssl/mongodb.pem
      CAFile: /etc/ssl/ca.pem

restart:

service mongod restart

then:

mongo-- ssl-- host www.ericchoo.cn-- sslPEMKeyFile / etc/ssl/mongodb.pem-- sslCAFile / etc/ssl/ca.pem

error report:

2018-05-18T02:09:08.977+0800 W NETWORK  [thread1] Failed to connect to 139.199.188.225:27017, in(checking socket for error after poll), reason: Connection refused
2018-05-18T02:09:08.978+0800 E QUERY    [thread1] Error: couldn"t connect to server www.ericchoo.cn:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:251:13
@(connect):1:6
exception: connect failed

at this time, I remove the ssl configuration from conf, restart mongod, and run mongo shell, and then I can connect again.

this may be my certificate. Is there a problem? (the AsiaInfo certificate downloaded by Tencent Cloud is not transferred by pem, with openssl) or my step is wrong.

Mar.12,2021
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-64f5-1bf5fcc-31fc7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf5fcc-31fc7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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