mhenke1 opened a new pull request #4839: Use openjdk11-openj9 to overcome 
performance degradations
URL: https://github.com/apache/openwhisk/pull/4839
 
 
   ## Description
   This PR changes the JDK to OpenJDK11 - OpenJ9to  overcome major performance 
degradations observed in our performance tests.
   Please see [this mailing list 
thread](https://lists.apache.org/thread.html/r6578ef3129e036911adf261382e304e145782d0633f13ff3dc9898eb%40%3Cdev.openwhisk.apache.org%3E)
 for details
   
   ## Related issue and scope
   - [ ] I opened an issue to propose and discuss this change (#????)
   
   ## My changes affect the following components
   - [ ] API
   - [x] Controller
   - [ ] Message Bus (e.g., Kafka)
   - [ ] Loadbalancer
   - [x] Invoker
   - [ ] Intrinsic actions (e.g., sequences, conductors)
   - [ ] Data stores (e.g., CouchDB)
   - [ ] Tests
   - [x] Deployment
   - [ ] CLI
   - [ ] General tooling
   - [ ] Documentation
   
   ## Types of changes
   <!--- What types of changes does your code introduce? Use `x` in all the 
boxes that apply: -->
   - [ ] Bug fix (generally a non-breaking change which closes an issue).
   - [x] Enhancement or new feature (adds new functionality).
   - [ ] Breaking change (a bug fix or enhancement which changes existing 
behavior).
   
   ## Checklist:
   - [x] I signed an [Apache 
CLA](https://github.com/apache/openwhisk/blob/master/CONTRIBUTING.md).
   - [x] I reviewed the [style 
guides](https://github.com/apache/openwhisk/wiki/Contributing:-Git-guidelines#code-readiness)
 and followed the recommendations (Travis CI will check :).
   - [ ] I added tests to cover my changes.
   - [ ] My changes require further changes to the documentation.
   - [ ] I updated the documentation where necessary.
   
   

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