I run a service that allows people to host various apps via a one-click install system. I noticed today that on one of my servers, that is running 1.2.1 Beta1, around 50% of all instances are running at 100% CPU.
I've enabled debug log but sadly nothing shows up in the logs for these instances. I also tried strace-ing the processes but it didn't give me enough info to find out what's going on.
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futex(0x17c4230, FUTEX_WAKE_PRIVATE, 1) = 1
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x7f9018004e30, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x17c4230, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7f9018004e30, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x17c4230, FUTEX_WAKE_PRIVATE, 1) = 1
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
futex(0x17c4230, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
select(0, NULL, NULL, NULL, {3, 0}) = 0 (Timeout)
select(0, NULL, NULL, NULL, {3, 0}q) = 0 (Timeout)
futex(0x7f9018004e30, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x17c4230, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7f9018004e30, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x17c4230, FUTEX_WAKE_PRIVATE, 1) = 1