I run a wordpress page on an AW2 EC2 t2.micro instance. Nothing unusual, but just a simple Wordpress site.
This happened quite sequentially, that every few weeks:
- my page will be unavailable, ssh unavailable
- when checking on the dashboard, everything looks right, no warnings or complaints.
- reload it in the AWS admin panel, one of the checks will fail: "The instance availability check failed (time)"
The system log shows that there is a kernel panic (all copied below). What could be the reason for this? bad equipment on the AWS side? It puzzles me a lot, please help. Thanks!
[2950123.794183] end_request: I/O error, dev xvda, sector 13514688
[2950123.797618] end_request: I/O error, dev xvda, sector 13514712
[2950123.798170] end_request: I/O error, dev xvda, sector 13514776
[2950123.798170] end_request: I/O error, dev xvda, sector 13514816
[2950123.798170] end_request: I/O error, dev xvda, sector 13514872
[2950123.798170] end_request: I/O error, dev xvda, sector 12894512
[2950123.798170] end_request: I/O error, dev xvda, sector 12875536
[2950123.798170] end_request: I/O error, dev xvda, sector 511456
[2950123.798170] end_request: I/O error, dev xvda, sector 13403944
[2950123.798170] end_request: I/O error, dev xvda, sector 515968
[2950124.114201] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007
[2950124.114201]
[2950124.118093] CPU: 0 PID: 1 Comm: init Not tainted 3.14.35-28.38.amzn1.x86_64 #1
[2950124.118093] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[2950124.118093] ffff88003d578ae0 ffff88003da2bc80 ffffffff814867ca ffffffff81788cf0
[2950124.118093] ffff88003da2bcf8 ffffffff814825ab ffffffff00000010 ffff88003da2bd08
[2950124.118093] ffff88003da2bca8 ffffffff81c9af20 0000000000000007 ffff88003da30480
[2950124.118093] Call Trace:
[2950124.118093] [<ffffffff814867ca>] dump_stack+0x45/0x56
[2950124.118093] [<ffffffff814825ab>] panic+0xc8/0x1cd
[2950124.118093] [<ffffffff8105ffd1>] do_exit+0xa41/0xa50
[2950124.118093] [<ffffffff8106005f>] do_group_exit+0x3f/0xa0
[2950124.118093] [<ffffffff8106f707>] get_signal_to_deliver+0x1c7/0x6e0
[2950124.118093] [<ffffffff81014458>] do_signal+0x48/0x6f0
[2950124.118093] [<ffffffff811e7c38>] ? fsnotify+0x228/0x2f0
[2950124.118093] [<ffffffff81014b68>] do_notify_resume+0x68/0x90
[2950124.118093] [<ffffffff8148d822>] retint_signal+0x48/0x86