abhilakshyadobhal opened a new pull request, #3333:
URL: https://github.com/apache/avro/pull/3333

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   ## What is the purpose of the change
   
   - This pull request ensures that trustedPackages is always initialized 
properly in SpecificDatumReader.
   Previously, `trustedPackages.addAll(Arrays.asList(SERIALIZABLE_PACKAGES));` 
was not called in every constructor, leading to cases where the system property 
`org.apache.avro.SERIALIZABLE_PACKAGES` was set, but custom packages were still 
not recognized as trusted.
   - This caused errors when `checkSecurity()` was invoked and the expected 
package was missing from the `trustedPackages` list.
   
   ## Verifying this change
   
   This change is already covered by existing tests that validate schema-based 
serialization and security checks.
   Additionally, we tested it manually by setting 
`org.apache.avro.SERIALIZABLE_PACKAGES` and verifying that user-defined 
packages are correctly added.
   
   ## Documentation
   
   - Does this pull request introduce a new feature? No
   - This is a bug fix and does not require additional documentation.
   
   
   ## JIRA Ticket
   
   - **JIRA Ticket:** 
[HADOOP-19315](https://issues.apache.org/jira/browse/HADOOP-19315)  
   - **Note:** Although this issue is tracked under the Hadoop JIRA board, the 
actual fix is required in Apache Avro.
   


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