Database Connection error reported when Openfire is started

[Problem description] 2013.12.2615: 57: 03org. jivesoftware. openfire. XMPPServer

[Problem description] 15:57:03 org. jivesoftware. openfire. XMPPServer-java. SQL. SQLException: ConnectionManager. getConnection () failed to obtain a connection after 11 retries. the exception from the last attempt is as follows: com. mysql. j

[Problem description]

2013.12.26 15:57:03 org. jivesoftware. openfire. XMPPServer-java. SQL. SQLException: ConnectionManager. getConnection () failed to obtain a connection after 11 retries. the exception from the last attempt is as follows: com. mysql. jdbc. exceptions. jdbc4.MySQLSyntaxErrorException: Unknown database 'openfire'

Java. lang. illegalArgumentException: java. SQL. SQLException: ConnectionManager. getConnection () failed to obtain a connection after 11 retries. the exception from the last attempt is as follows: com. mysql. jdbc. exceptions. jdbc4.MySQLSyntaxErrorException: Unknown database 'openfire'
At org. jivesoftware. openfire. XMPPServer. verifyDataSource (XMPPServer. java: 770)
At org. jivesoftware. openfire. XMPPServer. start (XMPPServer. java: 486)
At org. jivesoftware. openfire. XMPPServer. (XMPPServer. java: 216)
At sun. reflect. NativeConstructorAccessorImpl. newInstance0 (Native Method)
At sun. reflect. NativeConstructorAccessorImpl. newInstance (Unknown Source)
At sun. reflect. DelegatingConstructorAccessorImpl. newInstance (Unknown Source)
At java. lang. reflect. Constructor. newInstance (Unknown Source)
At java. lang. Class. newInstance0 (Unknown Source)
At java. lang. Class. newInstance (Unknown Source)
At org. jivesoftware. openfire. starter. ServerStarter. start (ServerStarter. java: 113)
At org. jivesoftware. openfire. starter. ServerStarter. main (ServerStarter. java: 58)
At sun. reflect. NativeMethodAccessorImpl. invoke0 (Native Method)
At sun. reflect. NativeMethodAccessorImpl. invoke (Unknown Source)
At sun. reflect. DelegatingMethodAccessorImpl. invoke (Unknown Source)
At java. lang. reflect. Method. invoke (Unknown Source)
At com.exe 4j. runtime. LauncherEngine. launch (Unknown Source)
At com.exe 4j. runtime. WinLauncher. main (Unknown Source)
Caused by: java. SQL. SQLException: ConnectionManager. getConnection () failed to obtain a connection after 11 retries. the exception from the last attempt is as follows: com. mysql. jdbc. exceptions. jdbc4.MySQLSyntaxErrorException: Unknown database 'openfire'
At org. jivesoftware. database. DbConnectionManager. getConnection (DbConnectionManager. java: 151)
At org. jivesoftware. openfire. XMPPServer. verifyDataSource (XMPPServer. java: 760)

... 16 more

[Solution] The openfire database in mysql is lost, and the cause of the loss is unknown.