On Mon, Apr 10, 2017 at 2:16 PM, Alex Gorbachev <ag@xxxxxxxxxxxxxxxxxxx> wrote: > I am trying to understand the cause of a problem we started > encountering a few weeks ago. There are 30 or so per hour messages on > OSD nodes of type: > > ceph-osd.33.log:2017-04-10 13:42:39.935422 7fd7076d8700 0 bad crc in > data 2227614508 != exp 2469058201 > > and > > 2017-04-10 13:42:39.939284 7fd722c42700 0 -- 10.80.3.25:6826/5752 > submit_message osd_op_reply(1826606251 > rbd_data.922d95238e1f29.00000000000101bf [set-alloc-hint object_size > 16777216 write_size 16777216,write 6328320~12288] v103574'18626765 > uv18626765 ondisk = 0) v6 remote, 10.80.3.216:0/1934733503, failed > lossy con, dropping message 0x3b55600 > > On a client sometimes, but not corresponding to the above: > > Apr 10 11:53:15 roc-5r-scd216 kernel: [4906599.023174] libceph: osd96 > 10.80.3.25:6822 socket error on write > > And from time to time, slow requests: > > 2017-04-10 13:00:04.280686 osd.91 10.80.3.45:6808/5665 231 : cluster > [WRN] slow request 30.108325 seconds old, received at 2017-04-10 > 12:59:34.172283: osd_op(client.11893449.1:324079247 > rbd_data.8fcdfb238e1f29.00000000000187e7 [set-alloc-hint object_size > 16777216 write_size 16777216,write 10772480~8192] 14.ed0bcdec > ondisk+write e103545) currently waiting for subops from 2,104 > 2017-04-10 13:00:06.280949 osd.91 10.80.3.45:6808/5665 232 : cluster > [WRN] 2 slow requests, 1 included below; oldest blocked for > > 32.108610 secs > > Questions: > > 1. Is there any way to drill further into the "bad crc" message? > sometimes they have nothing before or after them, but how to determine > from/to what this came from - another OSD, client, which one? > > 2. Network seems OK - no errors on NICs, regression testing does not > show any issues. I realize this can be disk response, but using > Christian Balzer's atop recommendation shows a pretty normal system. > What is my best course of troubleshooting here - dump historic ops on > OSD, wireshark the links or anything else? > > 3. Christian, if you are looking at this, what would be your red flags in atop? > One more note: OSD nodes are running kernel 4.10.2-041002-generic and clients - 4.4.23-040423-generic _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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