pt-mongodb-query-digest 3.0.4 report data NaN

[mars]

Mongodb version:
Percona Server for MongoDB 3.4.4

Percona Toolkit version:
3.0.4

Command line:
mongodb://mongouser:mongopwd@127.0.0.1:27017/mydb --authenticationDatabase=admin -d mydb

But report can't get valid data：

~~~
# Totals
# Ratio 0.00 (docs scanned/returned)
# Attribute pct total min max avg 95% stddev median
# ================== === ======== ======== ======== ======== ======== ======= ========
# Count (docs) 0
# Exec Time ms 0 NaN NaN NaN NaN NaN NaN NaN
# Docs Scanned 0 NaN NaN NaN NaN NaN NaN NaN
# Docs Returned 0 NaN NaN NaN NaN NaN NaN NaN
# Bytes recv 0 NaN NaN NaN NaN NaN NaN NaN
#
~~~

My replace percona toolkit version to 3.0.1, run this command again:
~~~
# Totals
# Ratio 1.00 (docs scanned/returned)
# Attribute pct total min max avg 95% stddev median
# ================== === ======== ======== ======== ======== ======== ======= ========
# Count (docs) 0
# Exec Time ms 100 45 0 31 11 31 12 7
# Docs Scanned 100 3.00 0.00 1.00 0.75 1.00 0.43 1.00
# Docs Returned 100 3.00 0.00 1.00 0.75 1.00 0.43 1.00
# Bytes recv 1 446.00 89.00 119.00 111.50 119.00 12.99 119.00
#
...
...
...
# Query 0: 0.00 QPS, ID a91b702238c037c615ec604eb79f2853
...
...
...
# Query {"documents":[{"_id":"59df47e678045ce600489360","a":1}],"insert":"mycol","ordered":true}
~~~

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PT-1449