ERRORCODE=-4499, SQLSTATE=08001 IBM官方站点对应的解决方案
导致原因：
Error 1: DB2 return code is -4499
Three problems might be the cause of this error.
DB2 is stopped.
The wrong DB2 database listening port number is specified.
The wrong database name is specified.
解决错误：
Check whether DB2 is started.
Check whether the database exists. Use the command
db2 list db directory to list the databases.
Check the DB2 listening port. The DB2 instance is listening on Port 50000 by
default, but the port number might have been modified.
Restart DB2 or restart the computer on which DB2 is running, because there
might be too many connections already active for DB2 to respond to the new
request.
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