Avamar

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Avamar client backups fail with error “Unable to resolve mcs server name”. The client cannot resolve the Avamar server hostname. Permanent resolution: correct the client DNS settings or have the network administrator create or fix the DNS entry for the Avamar server (Management Console Server).

Hyper‑V backups fail with Volume Shadow Copy Service (VSS) errors during the snapshot creation process.

Avamar 19.1 Activity 'Progress bytes' column for Virtual Machine (VM) backups jobs displays a smaller bytes value than the VM provisioned size.

Dell ItemPoint for Exchange GLR may fail with the error “Backup browse result is empty” in the Avamar Administrator UI. The avmapi.log reports MAPI/CDO initialization failures.

Avamar UI fails to add a Virtual Machine (VM) client, showing error “com.avamar.mc.cr.Client cannot be cast to com.avamar.mc.vmware.VmClient”. The cause is a duplicate client name because the server setting allow_duplicate_client_names is false. Set it to true and restart the Management Console Server (MCS)

AvInstaller (AVI) and Client Manager cannot download packages because the Avamar Downloader Service (ADS) cannot reach the Internet; connection to port 8580 (HTTP) times out, producing errors such as “The selected package cannot be downloaded” and a ConnectTimeoutException. Opening port 8580 per the Avamar Product Security Guide resolves the issue.

Avamar fails to retrieve client log from the Activity monitor with "The session log is unavailable."

Exchange VSS DAG Backup of Passive Node Error 41466 "List of selected targets is empty"

This article provides instructions for downloading and installing the latest Avamar Security Roll-up on Avamar Virtual Edition (AVE) systems using the Avamar Installation Manager.

This article explains the conditions under which Avamar reports the "Event email notification failed" error due to mail server failures.

The Management Console Server (MCS) stops responding or is unresponsive after an upgrade to Avamar version 19.12.x. A restart of MCS will fix the issue temporarily but after a few days the issue recurs.

Period lock allows the locking of the backups residing on a Data Domain.

Avamar backups of Structured Query Language (SQL) databases fail at a set time, logging “cannot open backup device” and timeout errors, caused by concurrent Microsoft or third‑party backup jobs.

The Structured Query Language (SQL) client on a Windows cluster uses a different listening port because Cluster Backup Service lacks a fixed listen port, causing the service to assign a dynamic port. Fix by editing the Cluster Backup Service command line: remove --disablegui and add --listenport=8888. Restart the Avamar Cluster service.

Avamar Backup of SharePoint Farm completed with exception, generating the error on Back-End client:[avtar] INTERNAL ERROR: <0001> assert error(mtPath.numelems() > 0), upath_win.cpp line 697.

An Exchange backup fails reporting: Error retrieving Active Directory configuration search object -- cannot continue.

Avamar Structured Query Language (SQL) backup truncates but does not shrink SQL Server logs; it only marks inactive virtual log files for reuse. Database Administrators (DBAs) must run a shrink

Avamar image backups to Data Domain (DD) fail with avtar errors 10542, 10509, 10630, 8941 due to proxies not in Data Domain Boost (DD Boost) access list; add proxy clients via ddboost access add clients command.

RecoverPoint for Virtual Machines(VMs) 6.0.3.1 and later are qualified with VMware vStorage APIs for Data Protection(VADP) backup solutions. However, sometimes protected Virtual Machines may see Snapshot Consolidation errors or Virtual Machine restarts, during backup operations.

VMware image backups fail with avvcbimage Error <17780> indicating that the ESXi host is in Maintenance Mode or that the Avamar MCS has outdated VM‑to‑host mapping information.

This article explains an issue when accessing the Avamar Administrator console.

This article explains an issue where Avamar backup logs cannot be viewed, even though backups complete successfully.

This article outlines a known issue that occurs in Avamar Administrator (JNLP) following an update to Java version 1.8.0_481.

Avamar Gen4T nodes on SLES 11 SP3 (kernel 2.6.37 ) show dropped‑packet counters on the passive bond because the kernel now treats VLAN tag errors, unknown protocols and broadcast traffic as drops.

How to retrieve SQL Server database size details and the most recent FULL and LOG backup information by running a T‑SQL script in SQL Server Management Studio

Avamar client cache files (p_cache and f_cache) automatically grow as needed based on the amount of data the client backs up. However, these files do not shrink automatically when the dataset is later reduced. This article explains how to manually reduce the cache file size after decreasing the backup scope.

Dell Avamar Data Store Gen5A remediation is available for multiple security vulnerabilities that could be exploited by malicious users to compromise the affected system.

Log entries show avvcbimage warnings with exit code 158 and avtar error 10541, indicating the Data Domain server name cannot be resolved, caused by DNS or name‑server configuration error on the Avamar Proxy.