qiguoxiaosheng opened a new pull request #3712: Fix the ConcurrentModificationException occured when connect presto via JDBC generic interpreter URL: https://github.com/apache/zeppelin/pull/3712 ### What is this PR for? This PR is to fix a issue of connect presto via jdbc interpreter when more than one element needs to be removed from the jdbc properties. In this PR, I only change a method which iterate keys from jdbc properties. I tested it manully with presto-0.215. ### What type of PR is it? [Bug Fix] ### Todos * [ ] - Task ### What is the Jira issue? ### How should this be tested? Compiles locally, no unit test performed. More than one element needs to be removed in the properties. ### Screenshots (if appropriate) ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? No
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