mq的重连设置

maxReconnectAttempts

-1 | 0

From version 5.6 onwards: -1 is default and means retry forever, 0 means don‘t retry (only try connection once but no retry).
Prior to version 5.6: 0 is default and means retry forever.
All versions: If set to >0, then this is the maximum number of reconnect attempts before an error is sent back to the client.