# Amazon EMR 7.9.0 - Oozie release notes
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**Oozie changes:**


| Type | Description | 
| --- | --- | 
| Upgrade | Avro upgrade to 1.11.4 | 

**Oozie known issues:**
+ Version Conflict in Oozie Sharelib:
  + Oozie sharelib contains multiple versions of commons-cli (versions 1.2 and 1.5).
  + If you encounter compatibility issues, consider either:
    + Removing commons-cli-1.2 JAR files.
    + Replacing commons-cli-1.2 with commons-cli-1.5.
+ Pig JAR Compatibility:
  + The Pig jar included by default in Oozie sharelib is the open-source jar. This differs from the Pig jar available elsewhere in the EMR cluster, on installing the Pig application, which includes additional EMR-specific enhancements and optimizations. Users should be aware of this difference when developing Pig workflows.