# Troubleshooting

Troubleshoot common issues in Apache Pinot.

* [Troubleshoot issues with the multi-stage query engine (v2)](https://docs.pinot.apache.org/release-1.4.0/reference/troubleshooting/troubleshoot-multi-stage-query-engine)
* [Troubleshoot issues with ZooKeeper znodes](https://docs.pinot.apache.org/release-1.4.0/reference/troubleshooting/troubleshoot-zookeeper)