sporadic gerrit build job failue: "broken pipe"

We get this more often than not in the openbsc build job, I'm still not sure how to fix it: ====================================================================== ERROR: testBSCreload (__main__.TestVTYNAT) ---------------------------------------------------------------------- Traceback (most recent call last): File "./vty_test_runner.py", line 785, in testBSCreload b0 = nat_bsc_sock_test(0, "lol") File "./vty_test_runner.py", line 1276, in nat_bsc_sock_test ipa_handle_resp(bsc, tk, verbose) File "./vty_test_runner.py", line 1260, in ipa_handle_resp x.send(IPA().id_resp(IPA().identity(name = tk.encode('utf-8')))) error: [Errno 32] Broken pipe ---------------------------------------------------------------------- Ran 43 tests in 51.717s FAILED (errors=1) Reducing the nr of executors hasn't had an effect yet. Could there be another cause? Too fragile timing or something? ~N -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte