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Overview: Checkpoint backups save a copy of the checkpoints from a Single node Avamar server, AVE, VDP, or VBA to the Data Domain for disaster recovery. Symptoms: No checkpoint backup (cpbackup) is created on the Data Domain (DD). The following events can be seen in the /usr/local/avamar/var/client/cpbackup-cp.<tag> .log: grep -i "tar.*denied" /usr/local/avamar/var/client/cpbackup-cp.20161026142704-101850.log [Mon Oct 31 09:34:48 2016] Backup upgrade files path: /tmp/backups_20161031_093448 [Mon Oct 31 09:34:48 2016] Creating /tmp/backupupgradefiles.tar [Mon Oct 31 09:34:48 2016] Execute: tar -cvf /tmp/backupupgradefiles.tar -C /tmp/backups_20161031_093448 . 2>&1 [Mon Oct 31 09:34:48 2016] Execute output: tar: /tmp/backupupgradefiles.tar: Cannot open: Permission denied tar: Error is not recoverable: exiting now .. [Mon Oct 31 09:34:48 2016] Error code: 2 [Mon Oct 31 09:34:48 2016] Changing permissions for /tmp/backupupgradefiles.tar [Mon Oct 31 09:34:48 2016] Execute: chmod a+r /tmp/backupupgradefiles.tar 2>&1 [Mon Oct 31 09:34:48 2016] Error code: 1 .. ddrmaint cp-backup-finish Command failed. Error code: 1.
First seen after an upgrade to Avamar v7.3.0.226, the checkpoint backup to Data Domain fails if the /tmp directory contains the backupupgradefiles.tar file with root ownership. In Avamar 7.3.0.226 MCS cannot access the /tmp/backupupgradefiles.tar file if it is owned by root user. This file is removed at the end of every successful checkpoint backup operation. A failure in the checkpoint backup operation can leave the backupupgradefiles.tar file in the /tmp directory.
Although the issue should be resolved for Avamar Versions 7.5 and higher, it is worth verifying that this is not the issue: 1. Log in to the Avamar Utility Node as admin. 2. Elevate to root privilege. 3. Assuming it exists, remove the /tmp/backupupgradefiles.tar file. 4. Allow the next checkpoint backup to run during the maintenance window (after the hfscheck ). 5. If there are still errors with the checkpoint backups, Create a Service Request with the Dell Technologies Avamar Support team.
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