It appears that thumbor1004.eqiad.wmnet is having memory issues:
[Wed Feb 6 12:53:56 2019] mce: [Hardware Error]: Machine check events logged [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: HANDLING MCE MEMORY ERROR [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: CPU 1: Machine Check Event: 0 Bank 10: 8c000050000800c1 [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: TSC 0 [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: ADDR cc68f4000 [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: MISC 90840800080208c [Wed Feb 6 12:53:56 2019] EDAC sbridge MC1: PROCESSOR 0:306e4 TIME 1549457515 SOCKET 1 APIC 20 [Wed Feb 6 12:53:56 2019] EDAC MC1: 1 CE memory scrubbing error on CPU_SrcID#1_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0xcc68f4 offset:0x0 grain:32 syndrome:0x0 - area:DRAM err_code:0008:00c1 socket:1 ha:0 channel_mask:2 rank:1)
Server has not been depooled as it is not causing service issues for the time being