Warning messages in "All Log Entries" report that "the file is on an unavailable NFS file system. Skipping."

Article:TECH17008  |  Created: 2002-01-04  |  Updated: 2013-10-23  |  Article URL http://www.symantec.com/docs/TECH17008
Article Type
Technical Solution

Product(s)

Environment

Issue



Warning messages in "All Log Entries" report that "the file is on an unavailable NFS file system. Skipping."

Error



19:25:54 [23763] <8> bpbkar validate_argument: WRN - /the/file/path is on an unavailable NFS file system. Skipping.

Solution



The VERITAS NetBackup client binary bpbkar issues stat() system calls to files to obtain information about the files to be backed up. This is done before the file is opened to read the data for backup. In order to prevent backups hanging at files in an NFS file system during the stat() system call, a timeout value is defined. This is called NFS_ACCESS_TIMEOUT. If the stat() is not returned during this time interval, the above message is shown in the "All log entries" report as well as in the bpbkar log.

If this is the case, check the following items:

A. If the file is in an NFS file system, check the network connections and NFS server.

B. If the file is not in an NFS file system, look for these possible causes:

1. Make sure that disks or volumes on which the file system resides are in healthy condition.
2. Try scheduling a backup when the file system is not busy.
3. Avoid multiple backup jobs from the same file system during the same backup window; this will thrash the disks.
4. Avoid multiple jobs from concatenated volumes, though such volumes use multiple disks. The read/write load is not uniformly distributed as in the case of striped or mirrored volumes.
5. Try tuning the file system. Refer to the manual pages for the file systems.

If tuning of the file system is not possible until the next available maintenance window, a workaround is to increase the NFS_ACCESS_TIMEOUT value for the client so as to ensure successful backups. For this add this line to client bp.conf:

NFS_ACCESS_TIMEOUT = <value>

The <value> is the number of seconds, the default is 5.





Legacy ID



241840


Article URL http://www.symantec.com/docs/TECH17008


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