Error
Error Code: ORA-28501

Oracle ORA-28501: Database Link Failure

📦 Oracle Database
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Description

The ORA-28501 error indicates a communication problem when using a heterogeneous database link to connect to a non-Oracle system. This error is often accompanied by a second error message originating from the target non-Oracle database, providing more specific details about the failure.
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Error Message

ORA-28501: communication error on heterogeneous database link
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Known Causes

4 known causes
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Network Connectivity Issue
A network problem prevents the Oracle database server from reaching the non-Oracle system. This can include firewall rules, DNS resolution failures, or general network outages.
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Incorrect Connection Details
The database link configuration contains incorrect connection parameters such as hostname, port, service name, or user credentials for the non-Oracle system.
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Driver Incompatibility
The required Oracle Heterogeneous Services (HS) agent or driver for the non-Oracle system is either missing, incompatible with the Oracle database version, or incorrectly configured.
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Target Database Unavailable
The non-Oracle system is down, undergoing maintenance, or experiencing performance issues that prevent it from accepting new connections.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

Find Help

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