MacBook Pro crashes intermittently My Mid-2014 15" MBP has been randomly crashing and I haven't been able to identify a pattern to the crashes. 

Here's a log right after a crash and automatic restart:

Anonymous UUID:       D3129405-6FEF-9C3C-46B9-EE344C1D6251

Wed Aug 30 09:41:25 2017

*** Panic Report ***
panic(cpu 7 caller 0xffffff801d96b46f): initproc exited  -- exit reason namespace 2 subcode 0xa description: none

uuid info:
 0x1043fe000    uuid = &lt;322c06b7-8878-311d-888c-c8fd2ca96ff3&gt;
 0x1033bb000    uuid = &lt;0ac314b8-c89c-3912-8bb7-e3f92c847169&gt;

Thread 3 crashed

RAX: 0x00000001033bb000, RBX: 0x00007fffba03e108, RCX: 0x00007fffba03e108, RDX: 0x000000010443d978
RSP: 0x0000700005d66f30, RBP: 0x0000700005d66f30, RSI: 0x000000000000018e, RDI: 0x0000000104440b18
R8:  0x00007fffba03e139, R9:  0x0000700005d67340, R10: 0x0000000000000000, R11: 0x00000001033ff188
R12: 0x0000000104440b18, R13: 0x0000000000000000, R14: 0x000000000000018e, R15: 0x000000010443d978
RFL: 0x0000000000010202, RIP: 0x0000000104411fd4, CS:  0x000000000000002b, SS:  0x0000000000000023

Thread 0: 0xffffff803de054e8
    0x00007fffba169386
      Could not read LR from frame at 0x0000700005bdeca8

Thread 1: 0xffffff803de02260
    0x00007fffba1711e6
    0x00007fffba01a24f
    0x0000000000000000

Thread 2: 0xffffff804305c288
    0x00007fffba1726ae
    0x00007fffba021a16
    0x00007fffba017a6c
    0x00007fffba00f13b
    0x00007fffba0227db
    0x00007fffba015306
    0x00007fffba00e6b5
    0x00007fffba00e48c
    0x00007fffba25b5a2
    0x00007fffba25b07d
    0x0000000000000000

Thread 3: 0xffffff804305b958
    0x0000000104411fd4
    0x000000010441af8b
    0x000000010440286d
    0x00007fffba03e282
    0x00000001033ff188
    0x00000001033ebe09
    0x00007fffba00c8fc
    0x00007fffba021a16
    0x00007fffba017a6c
    0x00007fffba00f13b
    0x00007fffba0227db
    0x00007fffba015306
    0x00007fffba02324c
    0x00007fffba02627a
    0x00007fffba25b47b
    0x00007fffba25b07d
    0x0000000103411000

Thread 4: 0xffffff80605d4078
    0x00007fffba25b070

Thread 5: 0xffffff806318f498
    0x00007fffba251bc1
    0x00007fffba251b59
    0x00000001033e9590
    0x00007fffba021486
    0x00007fffba00c8fc
    0x00007fffba0229a0
    0x00007fffba015306
    0x00007fffba00e6b5
    0x00007fffba00e48c
    0x00007fffba25b5a2
    0x00007fffba25b07d
    0x0000000000000000


Mac OS version:
16G29

Kernel version:
Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64
Kernel UUID: D3314D98-5D40-3CD8-98A4-F1DD46C20E03
System model name: MacBookPro11,2 (Mac-3CBD00234E554E41)
Root disk errors: "Could not recover SATA HDD after 5 attempts. Terminating."
Model: MacBookPro11,2, BootROM MBP112.0138.B40, 4 processors, Intel Core i7, 2.2 GHz, 16 GB, SMC 2.18f15
Graphics: Intel Iris Pro, Intel Iris Pro, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533641465238412D50422020
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533641465238412D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x134), Broadcom BCM43xx 1.0 (7.21.171.130.1a1)
Bluetooth: Version 5.0.5f1, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD SM0256F, 251 GB
USB Device: USB 3.0 Bus
USB Device: Card Reader
USB Device: Apple Internal Keyboard / Trackpad
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 17.1


I followed the troubleshooting suggestions in comments, but the disk appears to be ok. Is there anything else I can do myself before heading to an Apple Store? (The MBP is out of warranty)
What you are experiencing is called a “kernel panic”.

The line Root disk errors: "Could not recover SATA HDD after 5 attempts. Terminating."is a clear indication of your MacBook having an issue with the built-in SSD. Are you sure you had a look at the results of Disk First Aid, preferably run from the Recovery HD? As an alternative, you might want to boot into single-user mode (pressing cmd-S upon start) and use fsck to test the drive:

fsck -f


Use the reboot command once fsck has finished.

Has the MBP ever been opened or dropped? In that case, the SSD may just sit improperly in its slot which would explain the intermittent nature of the symptom. Unlikely but not impossible.