Slow data load on newly created bucket if cbimport is run immediately

slow data load on newly created bucket if cbimport is run immediately after the bucket is created.   

This is a bad developer experience, one would assume providing the --wait flag that the bucket would be ready.

The below cbimport takes 53.3 sec.

couchbase-cli bucket-create -c localhost:8091 \

  -u $CB_USERNAME -p $CB_PASSWORD  \

  --bucket=vb${inst}  \

  --bucket-type=couchbase  \

  --bucket-ramsize=100  \

  --bucket-replica=1  \

  --enable-flush=1  \

  --wait

# no sleep run cbimport as soon as possible 

cbimport json -c couchbase://127.0.0.1 -u $CB_USERNAME -p $CB_PASSWORD -b vb01 -d file:///tmp/data.json -f lines -t 2 -g evtest0::%id%

JSON `file:///tmp/data.json` imported to `couchbase://127.0.0.1` successfully

Documents imported: 3000 Documents failed: 0

real	0m53.357s

user	0m0.306s

sys	0m0.180s

adding just a 10 second sleep before the cbimport it runs 10X faster taking only 5.1 sec.

couchbase-cli bucket-create -c localhost:8091 \

  -u $CB_USERNAME -p $CB_PASSWORD  \

  --bucket=vb01  \

  --bucket-type=couchbase  \

  --bucket-ramsize=100  \

  --bucket-replica=1  \

  --enable-flush=1  \

  --wait

sleep 10

time cbimport json -c couchbase://127.0.0.1 \

  -u $CB_USERNAME -p $CB_PASSWORD -b vb01 \

  -d file:///tmp/data.json -f lines -t 2 -g evtest0::%id%

JSON `file:///tmp/data.json` imported to `couchbase://127.0.0.1` successfully

Documents imported: 3000 Documents failed: 0

real	0m5.152s

user	0m0.146s

sys	0m0.052s

SUCCESS: Bucket created

add 3000 docs to vb01

gen/cbimport block: 1 of size: 3000 start at Sat Mar 27 21:57:30 UTC 2021

3000 /tmp/data.json

JSON `file:///tmp/data.json` imported to `couchbase://127.0.0.1` successfully

Documents imported: 3000 Documents failed: 0

real 0m53.500s

user 0m0.345s

sys 0m0.219s

[ec2-user@ip-10-0-0-187 scripts]$ ./test_del_bucket_gen.sh admin jtester 1

SUCCESS: Bucket deleted

[ec2-user@ip-10-0-0-187 scripts]$ !vi

vi test_add_bucket_gen.sh

[ec2-user@ip-10-0-0-187 scripts]$

[ec2-user@ip-10-0-0-187 scripts]$

[ec2-user@ip-10-0-0-187 scripts]$

[ec2-user@ip-10-0-0-187 scripts]$ ./test_add_bucket_gen.sh admin jtester 1 3000

SUCCESS: Bucket created

add 3000 docs to vb01

gen/cbimport block: 1 of size: 3000 start at Sat Mar 27 22:00:00 UTC 2021

3000 /tmp/data.json

JSON `file:///tmp/data.json` imported to `couchbase://127.0.0.1` successfully

Documents imported: 3000 Documents failed: 0

real 0m5.119s

user 0m0.143s

sys 0m0.048s

[ec2-user@ip-10-0-0-187 scripts]$ !vi