Prototype java.sql.SQLException: The database is already in use by another process

Database setup or configuration error: Please verify your database settings and check the logs/error.log file for detailed error messages.
java.lang.IllegalArgumentException: java.lang.NullPointerException
at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:741)
at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:459)
at org.jivesoftware.openfire.XMPPServer.(XMPPServer.java:161)
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:106)
at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:51)
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.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)
Caused by: java.lang.NullPointerExcErro erstatrptoinn
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c
ea(XMPPServer.java:730)
… 16 more
Server halted

My understanding that Openfire is already opened once and Im trying to use the same database again. So I tried to close openfire-service.exe as well as rebooting the server. nothing

**Here’s a completel error.log, i had this problem for 3 days.I’m using HSQL for database. Here’s a list of running processes on the server. **

C:\Documents and Settings\Administrator>tasklist.exe

Image Name PID Session Name Session# Mem Usage
========================= ======== ================ =========== ============
System Idle Process 0 Console 0 28 K
System 4 Console 0 12,792 K
smss.exe 388 Console 0 472 K
csrss.exe 436 Console 0 4,440 K
winlogon.exe 460 Console 0 3,660 K
services.exe 508 Console 0 26,680 K
lsass.exe 520 Console 0 25,720 K
svchost.exe 728 Console 0 2,900 K
svchost.exe 848 Console 0 4,856 K
svchost.exe 908 Console 0 5,220 K
svchost.exe 944 Console 0 7,508 K
svchost.exe 972 Console 0 33,980 K
spoolsv.exe 1308 Console 0 8,012 K
msdtc.exe 1332 Console 0 4,212 K
dfssvc.exe 1428 Console 0 4,812 K
dns.exe 1460 Console 0 35,976 K
svchost.exe 1544 Console 0 2,224 K
inetinfo.exe 1632 Console 0 27,464 K
llssrv.exe 1660 Console 0 5,572 K
ntfrs.exe 1776 Console 0 1,364 K
svchost.exe 1968 Console 0 2,044 K
sbscrexe.exe 2056 Console 0 6,892 K
ShadowProtectSvc.exe 2096 Console 0 492 K
ShadowProtectSvc.exe 2120 Console 0 3,944 K
snmp.exe 2324 Console 0 5,904 K
snmptrap.exe 2372 Console 0 2,112 K
OWSTIMER.EXE 2396 Console 0 10,344 K
wins.exe 2584 Console 0 6,540 K
exmgmt.exe 2640 Console 0 10,112 K
mad.exe 2720 Console 0 19,672 K
mssearch.exe 2756 Console 0 12,748 K
vsnapvss.exe 2868 Console 0 2,432 K
svchost.exe 2892 Console 0 8,700 K
store.exe 3740 Console 0 156,780 K
emsmta.exe 3776 Console 0 5,940 K
wmiprvse.exe 1684 Console 0 15,692 K
wmiprvse.exe 4132 Console 0 23,600 K
svchost.exe 4292 Console 0 4,900 K
svchost.exe 4308 Console 0 4,152 K
explorer.exe 1188 Console 0 14,496 K
BacsTray.exe 4688 Console 0 2,928 K
spicetray.exe 4716 Console 0 4,828 K
ctfmon.exe 4648 Console 0 2,816 K
spiceworks.exe 2500 Console 0 59,040 K
csrss.exe 2548 RDP-Tcp#1 1 4,208 K
winlogon.exe 5456 RDP-Tcp#1 1 3,752 K
rdpclip.exe 2472 RDP-Tcp#1 1 3,680 K
explorer.exe 1028 RDP-Tcp#1 1 18,344 K
BacsTray.exe 6072 RDP-Tcp#1 1 2,948 K
ctfmon.exe 5996 RDP-Tcp#1 1 2,884 K
sqlmangr.exe 1040 RDP-Tcp#1 1 5,192 K
mmc.exe 4444 RDP-Tcp#1 1 39,880 K
cmd.exe 4712 RDP-Tcp#1 1 100 K
mspaint.exe 1364 RDP-Tcp#1 1 21,688 K
firefox.exe 2680 RDP-Tcp#1 1 58,328 K
w3wp.exe 5428 Console 0 7,848 K
wuauclt.exe 4968 Console 0 3,944 K
cmd.exe 4732 RDP-Tcp#1 1 1,620 K
tasklist.exe 5608 RDP-Tcp#1 1 3,860 K

A copy of error.log is attached

ended up reinstalling the server. close discussion please.