Re: RGW: ERROR: failed to distribute cache

[Mark Schouten <mark@xxxxxxxx>]

I see this once on both my RGW's today:

rgw01:

2017-11-06 10:36:35.070068 7f4a4f300700  0 ERROR: failed to distribute cache for default.rgw.meta:.meta:bucket.instance:XXX/YYY:ZZZ.30636654.1::0

2017-11-06 10:36:45.139068 7f4a4f300700  0 ERROR: failed to distribute cache for default.rgw.data.root:.bucket.meta.XXX:YYY:ZZZ.30636654.1

rgw02:

2017-11-06 10:38:29.606736 7f2463658700  0 ERROR: failed to distribute cache for default.rgw.meta:.meta:bucket.instance:XXX/YYY:ZZZ.30636741.1::0

2017-11-06 10:38:39.647266 7f2463658700  0 ERROR: failed to distribute cache for default.rgw.data.root:.bucket.meta.XXX:YYY:ZZZ.30636741.1

Not sure if it's a coincidence, but it is the bucket that should be dynamically reindexed for resharding, which is broken (Issue #22046)

Met vriendelijke groeten,

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Mark Schouten | Tuxis Internet Engineering
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Van: Wido den Hollander <wido@xxxxxxxx>
Aan: <ceph-users@xxxxxxxxxxxxxx>
Verzonden: 6-11-2017 16:29
Onderwerp: RGW: ERROR: failed to distribute cache

Hi,

On a Ceph Luminous (12.2.1) environment I'm seeing RGWs stall and about the same time I see these errors in the RGW logs:

2017-11-06 15:50:24.859919 7f8f5fa1a700  0 ERROR: failed to distribute cache for gn1-pf.rgw.data.root:.bucket.meta.XXXXX:eb32b1ca-807a-4867-aea5-ff43ef7647c6.20755572.20
2017-11-06 15:50:41.768881 7f8f7824b700  0 ERROR: failed to distribute cache for gn1-pf.rgw.data.root:XXXXX
2017-11-06 15:55:15.781739 7f8f7824b700  0 ERROR: failed to distribute cache for gn1-pf.rgw.meta:.meta:bucket.instance:XXXXX:eb32b1ca-807a-4867-aea5-ff43ef7647c6.20755572.32:_XK5LExyXXXXX6EEIXxCD5Cws:1
2017-11-06 15:55:25.784404 7f8f7824b700  0 ERROR: failed to distribute cache for gn1-pf.rgw.data.root:.bucket.meta.XXXXX:eb32b1ca-807a-4867-aea5-ff43ef7647c6.20755572.32

I see one message from a year ago: http://lists.ceph.com/pipermail/ceph-users-ceph.com/2016-June/010531.html

The setup has two RGWs running:

- ceph-rgw1
- ceph-rgw2

While trying to figure this out I see that a "radosgw-admin period pull" hangs for ever.

I don't know if that is related, but it's something I've noticed.

Mainly I see that at random times the RGW stalls for about 30 seconds and while that happens these messages show up in the RGW's log.

Is anybody else running into this issue?

Wido
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