Nothing to go on:

[22:19:19.916] strace013Thread9>notified
[22:19:20.78] waiting for finish strace013Thread17
[22:21:20.87] waiting for finish strace013Thread19
[22:23:20.89] waiting for finish strace013Thread23
[22:25:20.105] waiting for finish strace013Thread31
[22:27:20.120] waiting for finish strace013Thread35
[22:29:20.136] waiting for finish strace013Thread43
[22:31:20.138] waiting for finish strace013Thread47
[22:33:20.154] waiting for finish strace013Thread55
[22:35:20.170] waiting for finish strace013Thread59
[22:37:20.172] waiting for finish strace013Thread67
Timeout signalled after 1200 seconds
[22:39:20.187] waiting for finish strace013Thread71
[22:41:20.637] waiting for finish strace013Thread72

Test normally runs in under a minute.