If the NFS share is set to asynchronous and it is being used for one or more of the Redstor Pro working directories (cache, database, temp/"toBackup" or logs), you are likely to encounter the following error message when trying to back up:
Error: 2012/02/13 20:20:46 could not create backup: database is locked
Within the backupservice.log, the following will also be shown:
2012-02-13 20:20:46,420 ERROR errorlog - could not create backup: database is locked
com.attix5.sqlite.SQLiteException: database is locked
at com.attix5.sqlite.Database.native_exec(Native Method)
at com.attix5.sqlite.Database.execRow(Database.java:251)
at com.letsbackup.fileutils.index.IndexDatabase.setStandardPragmas(IndexDatabase.java:2667)
at com.letsbackup.fileutils.index.IndexDatabase.openOldIndex(IndexDatabase.java:246)
at com.letsbackup.fileutils.index.IndexDatabase.setState0(IndexDatabase.java:2238)
at com.letsbackup.fileutils.BackupProcessor.processSelection(BackupProcessor.java:2100)
at com.letsbackup.fileutils.BackupProcessor.doBackupCommand(BackupProcessor.java:1162)
at com.letsbackup.fileutils.BackupProcessor.run(BackupProcessor.java:578)
To resolve this issue, set the NFS share to synchronous in the "exports" NFS configuration file.
You should restart the appropriate NFS services, and should also dismount and remount the share on the Agent. Make sure that the GUI is closed and that the Redstor Pro service is stopped during this process.
Further details on NFS can be found here: http://nfs.sourceforge.net/.
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