# Amazon EMR 7.10.0 - Tez release notes
7.10.0 release notes

## Amazon EMR 7.10.0 - Tez changes
Tez changes


| Type | Description | 
| --- | --- | 
| Bug Fix | [TEZ-4595](https://issues.apache.org/jira/browse/TEZ-4595): Fixed a bug where Tez would crash when trying to process a new DAG while it was still recovering from a previous failure, causing both DAGs to interfere with each other and throw an INVALID\$1EVENT exception. | 

**Tez release notes**

Bug fix notes – The issue occurred when recovery files were present and the Application Master transitioned through RECOVERING → IDLE → RUNNING → IDLE states, creating a brief window where Hive could submit new DAGs during the IDLE → RUNNING transition. Modified the state transition logic to skip IDLE state when recovery files are present. The AM now follows RECOVERING → RUNNING → IDLE flow, ensuring new DAG submission only occurs after the recovered DAG is fully cleaned up.