database issue - the recipient cannot see the message

Hello,

sometimes in a group chat window the posted messages are not visible. After a restart of the spark client (v2.8.0 Build 885) you can see that posts. We have installed the openfire server version 4.0.1 hosted on a windows server 2008r2.

Is there any simple solution available for solving that problem? I found following error messages:

Database setup or configuration error: Please verify your database settings and check the logs/error.log file for detailed error messages.

1. 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: java.sql.SQLException: The database is already in use by another process: org.hsqldb.persist.NIOLockFile@c69e02e3[file =C:\Program Files (x86)\Openfire\embedded-db\openfire.lck, exists=true, locked=false, valid=false, fl =null]: java.lang.Exception: java.io.IOException: The process cannot access the file because another process has locked a portion of the file : C:\Program Files (x86)\Openfire\embedded-db\openfire.lck

at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:734)

at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:448)

at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:169)

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.newInstance(Unknown Source)

at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:105)

at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56)

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)

at com.install4j.runtime.launcher.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: java.sql.SQLException: The database is already in use by another process: org.hsqldb.persist.NIOLockFile@c69e02e3[file =C:\Program Files (x86)\Openfire\embedded-db\openfire.lck, exists=true, locked=false, valid=false, fl =null]: java.lang.Exception: java.io.IOException: The process cannot access the file because another process has locked a portion of the file : C:\Program Files (x86)\Openfire\embedded-db\openfire.lck

at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager .java:156)

at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:724)

... 16 more

At the server log: