When dealing with Oracle databases, administrators often encounter various error codes, and one of the more frustrating ones is the ORA-24247 error. This error typically occurs when there is an issue with the Oracle XML DB repository or with the Oracle Database registry. In this article, we will delve into the ORA-24247 error, explore the possible causes, and provide a step-by-step guide on how to resolve the issue.
Understanding the ORA-24247 Error
Before diving into the resolution process, it is essential to understand the ORA-24247 error and its associated symptoms. The error usually manifests as an ORA-24247: “network access denied by access control list (ACL)” message. This message indicates that the Oracle database is blocking network access due to an ACL configuration issue.
ACLs are used to control access to network services, and in this case, the ACL is preventing the Oracle database from accessing the required resources. To better understand ACLs, you can refer to the Oracle Database documentation on the topic.
Possible Causes of the ORA-24247 Error
Several factors can contribute to the occurrence of the ORA-24247 error. Some of the most common causes include:
- Missing or incorrect ACL configuration
- Insufficient privileges to create or modify ACLs
- Corrupted or damaged ACLs
- Outdated Oracle XML DB repository
Identifying the root cause of the error is crucial to resolving the issue effectively. Therefore, it is essential to investigate the error further and gather more information about the error message.
Gathering Information About the Error
When the ORA-24247 error occurs, Oracle provides an error message with additional details about the error. The message typically includes the following information:
- Error number (ORA-24247)
- Error message (network access denied by access control list (ACL))
- Additional details (optional)
It is essential to capture this information, as it will be useful in the resolution process.
Resolving the ORA-24247 Error
Now that we have a better understanding of the error and its possible causes, we can proceed to resolve the issue. The resolution process typically involves creating a new ACL, granting privileges, and modifying the Oracle XML DB repository. Let’s examine each step in more detail.
Step 1: Create a New ACL
First, we need to create a new ACL to replace the existing one. We can use the following SQL script to create the new ACL:
begin
for c in (select * from dba_networkACLEs) loop
dbms_network_acl_admin.DROP_ACL (c.acl);
end loop;acl => ‘resolve_ora_24247.xml’,
description => ‘Resolve ORA-24247 error’,
principal => ‘PUBLIC’,
is_grant => TRUE,
privilege => ‘connect’,
start_date => NULL,
end_date => NULL
);
acl => ‘resolve_ora_24247.xml’,
principal => ‘PUBLIC’,
privilege => ‘resolve’
);
end;
Make sure to modify the PRINCIPAL and PRIVILEGE parameters according to your specific requirements.
Step 2: Grant Privileges
After creating the new ACL, we need to grant privileges to the relevant users or roles. We can use the following SQL script to grant privileges:
begin
dbms_network_acl_admin.ADD_PRIVILEGE (
acl => 'resolve_ora_24247.xml',
principal => ' db_user ',
privilege => 'connect'
);acl => ‘resolve_ora_24247.xml’,
principal => ‘ db_user ‘,
privilege => ‘resolve’
);
end;
Make sure to replace ‘db_user’ with the actual username or role that requires the privileges.
Step 3: Modify the Oracle XML DB Repository
After granting privileges, we need to modify the Oracle XML DB repository to reflect the changes. We can use the following SQL script to modify the repository:
begin
DBMS_XDB CFG_UPDATE(
XMLSectionList => '/sys/acls/resolve_ora_24247.xml');
COMMIT;
end;Conclusion
In conclusion, resolving the ORA-24247 error requires a careful examination of the error message, a thorough understanding of ACLs, and a methodical approach to resolving the issue. By following the steps outlined in this article, you should be able to resolve the error effectively and get your Oracle database up and running smoothly. If you’re still experiencing issues or require further assistance, consider reaching out to PersonIT for professional support.
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