Error: Unable to Validate Permissions to Run Log Reader

Issue

While setting up the High-Volume Agent (HVA) for Oracle, setup tests fail with the following error:

Unable to validate permissions to run log reader

Environment

Connector: High-Volume Agent Oracle

Resolution

To resolve this issue, grant read-only access to the specific Oracle system views and tables required for Change Data Capture (CDC). For the full list of required grants, see the High-Volume Agent Oracle Setup Guide.

Although the list may appear extensive, these permissions are narrowly scoped. They allow us to read Oracle metadata, database configuration, and log-based replication information. They do not allow us to read application table data unless you explicitly grant SELECT on those tables.

Minimizing access

You can follow least-privilege principles by:

• Granting access only to the specific views listed in the setup error.
• Avoiding broad roles such as DBA or SELECT ANY TABLE.
• Granting SELECT on application tables only for the data you intend to replicate.

Cause

This issue occurs when the database user lacks read-only permissions on required Oracle system views and tables. The required objects fall into the following categories:

• Table metadata and structure: Objects such as COL$, ALL_TABLES, and ALL_TAB_COLS provide schema information, including column names, data types, and table structure. We use this metadata to map source tables to the destination.
• Constraints and indexes: Objects such as ALL_CONSTRAINTS and ALL_INDEXES identify primary keys, constraints, and indexes. We use this information to apply updates and deletes to the correct rows.
• Redo and archive logs: Objects such as V_$LOG, V_$LOGFILE, and V_$ARCHIVED_LOG allow the log reader to locate and process redo and archive logs for CDC.
• Encryption and partitioning: Objects such as ECOL$, ENC$, V_$ENCRYPTION_WALLET, TABPART$, and TABSUBPART$ support Oracle features such as Transparent Data Encryption (TDE) and partitioned tables.
• Database configuration: Objects such as V_$DATABASE, V_$PARAMETER, and DBA_TABLESPACES provide database settings, storage details, and other environment context needed to interpret extracted data correctly.
• Transaction monitoring: Objects such as V_$TRANSACTION and V_$SESSION help us to track active and long-running transactions to maintain replication consistency.