debug e2e test failure #1690

Job	Run time
checkstyle	26s
unit_tests (latest, 7.2, singlesite)	14m 20s
e2e_tests (latest, 7.2)	16m 30s
unit_tests (latest, 7.2, multisite)	12m 25s
e2e_tests (latest, 8.1)	16m 24s
unit_tests (latest, 8.1, singlesite)	15m 36s
e2e_tests (trunk, 7.2)	16m 30s
unit_tests (latest, 8.1, multisite)	15m 36s
e2e_tests (trunk, 8.1)	16m 26s
unit_tests (5.2, 7.2, singlesite)	13m 12s
unit_tests (5.2, 7.2, multisite)	15m 22s
	2h 32m 47s

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