CB 4.5.X: are multiple "couchstore_open_db failed" messages normal?

Couchbase Server
1

Hello, 4.5.1-2844, src-based.

Of course, compaction happened many times (and .couch. generation changed [as % XX, i guess]), but are such messages normal ?

[ns_server:info,2016-10-07T15:52:00.723Z,babysitter_of_ns_1@127.0.0.1:<0.75.0>:ns_port_server:log:210]memcached<0.75.0>: 2016-10-07T15:52:00.523347Z NOTICE (storage) INFO: couchstore_open_db failed, name=/opt/couchbase/var/lib/couchbase/data/storage/114.couch.11 options=2 error=no such file [No such file or directory], try it again!

~# ls -la /opt/couchbase/var/lib/couchbase/data/storage/114.couch.*
-rw-rw---- 1 couchbase couchbase 557147 Oct 7 15:52 /opt/couchbase/var/lib/couchbase/data/storage/114.couch.1

memcached<0.75.0>: 2016-10-07T15:52:00.961186Z NOTICE (storage) INFO: couchstore_open_db failed, name=/opt/couchbase/var/lib/couchbase/data/storage/338.couch.23 options=2 error=no such file [No such file or directory], try it again!

~# ls /opt/couchbase/var/lib/couchbase/data/storage/338.couch.*
/opt/couchbase/var/lib/couchbase/data/storage/338.couch.1

2

yes, they are normal. When compaction completes it has to “flip” from the old file to the new one, and during this time if part(s) of the system try to open the file they can fail - which they simply retry (as the new file should be in place very soon).

3

@drigby,
thanks for explanation.