ORA-00164: distributed autonomous transaction disallowed within migratable distributed transaction
Cause: A request was made by the application to start a distributed autonomous transaction when the application was in a migratable distributed transaction.
Action: Roll back or commit the current distributed transaction first.
The ORA-00164 error is related to distributed database operations in Oracle. Here are some frequently asked questions (FAQs) about this error:-
1. What is ORA-00164 error in Oracle?
- ORA-00164 is an error code indicating that the distributed transaction lock could not be acquired within the specified time. This error typically occurs in distributed database environments when there are issues with distributed transaction processing.
2. What causes ORA-00164 error?
- ORA-00164 error can occur due to various reasons, such as:
- Network issues between database nodes in a distributed environment.
- Resource contention or deadlock situations.
- Insufficient resources (such as memory or CPU) on one or more database nodes.
- Misconfiguration of distributed transaction settings.
3. How to diagnose ORA-00164 error?
- To diagnose ORA-00164 error, you can:
- Check the alert log and trace files for additional error messages or information.
- Review the configuration settings related to distributed transactions.
- Monitor system resources (CPU, memory, network) to identify any bottlenecks.
- Use Oracle diagnostic tools like Enterprise Manager or SQL trace to capture detailed information about the error.
4. How to resolve ORA-00164 error?
- To resolve ORA-00164 error, you can try the following steps:
- Check network connectivity between database nodes and resolve any network issues.
- Increase the value of the DISTRIBUTED_LOCK_TIMEOUT parameter to allow more time for acquiring distributed transaction locks.
- Identify and resolve any resource contention or deadlock situations.
- Ensure that all database nodes have sufficient resources (memory, CPU, etc.) to handle distributed transactions.
- Review and adjust configuration settings related to distributed transactions based on Oracle documentation and best practices.
5. How to prevent ORA-00164 error?
- To prevent ORA-00164 error, you can:
- Regularly monitor and maintain the distributed database environment.
- Optimize distributed transaction processing to minimize the risk of resource contention and deadlock situations.
- Implement proper error handling and retry mechanisms in application code to handle transient errors like ORA-00164 gracefully.
- Follow Oracle's best practices and recommendations for configuring and managing distributed transactions.
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