improve: cleaner throws Exception #4766

Job	Run time
check_format_and_unit_tests	1m 21s
special_integration_tests (17)	1m 59s
special_integration_tests (21)	1m 47s
httpclient-tests (jdk) / integration_tests	21m 12s
httpclient-tests (jetty) / integration_tests	21m 9s
httpclient-tests (vertx) / integration_tests	21m 9s
integration_tests (17, 1.30.3) / integration_tests	21m 55s
integration_tests (17, 1.31.0) / integration_tests	22m 15s
integration_tests (17, v1.29.7) / integration_tests	20m 59s
integration_tests (17, v1.28.12) / integration_tests	21m 42s
integration_tests (21, 1.30.3) / integration_tests	21m 11s
integration_tests (21, 1.31.0) / integration_tests	22m 5s
integration_tests (21, v1.28.12) / integration_tests	21m 12s
integration_tests (21, v1.29.7) / integration_tests	21m 45s
	4h 1m 41s

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