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From: Nikhil Ingole <Nikhil.Ingole@varian.com>
To: "user@couchdb.apache.org" <user@couchdb.apache.org>
Subject: couchjs process running forever in CouchDB 2.0
Thread-Topic: couchjs process running forever in CouchDB 2.0
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Date: Thu, 13 Jul 2017 15:17:26 +0000
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Hi,

I have installed CouchDB  2.0 on Ubuntu 16.04 using the steps listed at - h=
ttp://docs.couchdb.org/en/2.0.0/install/unix.html

I have it running (not a clustered environment, just one instance of CouchD=
B )

I am puzzled by the never ending couchjs processes that starts when I run s=
ome views.

I have around 30 views mostly simple ones ( some transformations in map and=
 default _count reduce)
All of these views starts some couchjs processes and around 10 of these cou=
chjs processes never ends.
If it matters - The data size is very small, only around 2K documents curre=
ntly.

Browsing  older Jira issues, it appears that this issue was fixed in 1.x re=
lease
And the potential issue that people pointed out was that socket connections=
 were not closed so the process is running,
However I am using the same client ( Ektorp API 1.4 ) to create all these 3=
0 views then how come only 10 of the couchjs process keep running forever w=
hile others are terminated.
These forever running couch processes are hogging up my CPU, each one is co=
nsuming CPU in the range of 60-90%

I do see multiple entries when I do  - netstat -ap tcp | grep TIME

tcp        0      0 10.0.x.x:52952         blob.bl6prdstp01c:https TIME_WAI=
T   -
tcp        0      0 10.0.x.x:33592         168.63.129.16:http      TIME_WAI=
T   -

(the 10.x IP is the Couchdb machine not sure about the others ( blob.... An=
d 168..) )

I am not sure what is causing this behavior and how to fix it.

I keep seeing the following error in logs (not sure if it is related to abo=
ve issue. And I keep getting it even after setting "n=3D1" in default.prope=
rties and restarting couchdb )

[error] 2017-07-13T09:08:10.880013Z couchdb@localhost emulator -------- Err=
or in process <0.24286.1> on node couchdb@localhost with exit value:
{database_does_not_exist,[{mem3_shards,load_shards_from_db,"_users",[{file,=
"src/mem3_shards.erl"},{line,327}]},{mem3_shards,load_shards_from_disk,1,[{=
file,"src/mem3_shards.erl"},{line,315}]},{mem3_shards,load_shards_from_disk=
,2,[{file,"src/mem3_shards.erl"},{line,331}]},{mem3_shards,for_docid,3,[{fi=
le,"src/mem3_shards.erl"},{line,87}]},{fabric_doc_open,go,3,[{file,"src/fab=
ric_doc_open.erl"},{line,38}]},{chttpd_auth_cache,ensure_auth_ddoc_exists,2=
,[{file,"src/chttpd_auth_cache.erl"},{line,187}]},{chttpd_auth_cache,listen=
_for_changes,1,[{file,"src/chttpd_auth_cache.erl"},{line,134}]}]}


Any help appreciated, have been struggling to isolate the issue for quite s=
ome time.

Thanks in anticipation.

Regards,
Nikhil

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