Question: if I deploy Apache Drill in a existing Hadoop cluster, dose the Apache Drill have any negative influence on the other members of Hadoop ecosystem in the existing Hadoop cluster ?

Answer: 
It wont have any negative impact on other members of ecosystem but it will hog a lot of memory of the node. Make sure you have enough memory before installing Drill.
It's Hadoop compatibility component. The influence only happen if you don't provide enough resource for all the members to operate.

You can put Drill with HDFS in the same node or same cluster to get the best performance.