FrederikP commented on issue #3500: NIFI-6322: Reuse evaluator stored in CompiledExpression when creating a query. URL: https://github.com/apache/nifi/pull/3500#issuecomment-497000105 Indeed there is an issue there. This test fails in the last line: ``` @Test public void testPreparedQueryWithReducingFunction() { final Map<String, String> attributes = new HashMap<>(); attributes.put("comma", ","); attributes.put("question", " how are you?"); final StandardPreparedQuery prepared = (StandardPreparedQuery) Query.prepare("${anyMatchingAttribute('audi.*'):matches('hello')}"); assertEquals("false", prepared.evaluateExpressions(attributes, null)); assertEquals("false", prepared.evaluateExpressions(attributes, null)); attributes.put("audience", "bla"); assertEquals("false", prepared.evaluateExpressions(attributes, null)); attributes.put("auditorium", "hello"); assertEquals("true", prepared.evaluateExpressions(attributes, null)); } ``` We won't be able to look into this further until next week. (holiday in GER + weekend) But we are willing to invest some time into this, because I think this really has huge impact on the performance of our cluster.
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