arachni_rpc get stuck in deadlock

[bardelch]

Instance - 16918-17003.log

[Wed Dec 5 16:51:52 2018] [info] Depending on server responsiveness and network conditions this may take a while.
[Wed Dec 5 16:52:02 2018] [bad] Retrying for: https://website/ [Timeout was reached]
[Wed Dec 5 16:52:12 2018] [bad] Retrying for: https://website/ [Timeout was reached]
[Wed Dec 5 16:52:22 2018] [bad] Retrying for: https://website/ [Timeout was reached]
[Wed Dec 5 16:52:33 2018] [bad] Retrying for: https://website/ [Timeout was reached]
[Wed Dec 5 16:52:43 2018] [bad] Retrying for: https://website/ [Timeout was reached]
[Wed Dec 5 16:52:53 2018] [error] Giving up trying to audit: https://website/
[Wed Dec 5 16:52:53 2018] [error] Couldn't get a response after 5 tries: Timeout was reached.
[Wed Dec 5 16:52:53 2018] [line]
[Wed Dec 5 16:52:53 2018] [status] Workload exhausted, waiting for new pages from the browser-cluster...
[Wed Dec 5 16:52:53 2018] [info] Pending jobs: 47

Instance - 16918-17003.error.log

[2018-12-05 16:52:53 -0500] Giving up trying to audit: https://website/
[2018-12-05 16:52:53 -0500] Couldn't get a response after 5 tries: Timeout was reached.

strace -p 16918

futex(0x7ecf30, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7ecf60, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7ecf64, FUTEX_WAIT_PRIVATE, 5394829, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x7ecf30, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7ecf60, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7ecf64, FUTEX_WAIT_PRIVATE, 5394831, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x7ecf30, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7ecf64, FUTEX_WAIT_PRIVATE, 5394833, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x7ecf30, FUTEX_WAKE_PRIVATE, 1) = 0
read(8, 0x35eb2b3, 5) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x7ecf64, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7ecf60, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7ecf30, FUTEX_WAKE_PRIVATE, 1) = 1