Github user jmesnil commented on the pull request: https://github.com/apache/activemq-artemis/commit/4db8cd54ca2174357e36e4f0c231ad66f128d8b8#commitcomment-24878689 In artemis-server/src/main/java/org/apache/activemq/artemis/core/config/TransformerConfiguration.java: In artemis-server/src/main/java/org/apache/activemq/artemis/core/config/TransformerConfiguration.java on line 23: In the same way, the properties should never be null (only empty).
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