Hi Daniel:
I did a new test where I stopped as soon as I saw one message that got discarded. Basically the following message got discarded:
{"event":"REGISTER","tindex":"52171","tlabel":"748030241","PhoneNumber":"11161","DeviceId":"abcd1234abcd1234","CallId":"10943-15480@198.24.63.39"}
The CallId parameter in the above json is auto incremented, so I tried gathering logs for messages with following CallIds:
"CallId":"10940-15480@198.24.63.39"
"CallId":"10941-15480@198.24.63.39"
"CallId":"10942-15480@198.24.63.39"
"CallId":"10943-15480@198.24.63.39"
"CallId":"10944-15480@198.24.63.39"
"CallId":"10945-15480@198.24.63.39"

And the message with CallID "CallId":"10943-15480@198.24.63.39" got discarded.

Here's the bunch of kamailio logs printed by the evapi module:
Logs for processed messages just before the discarded message:
DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43da494ad0] [146:{"event":"REGISTER","tindex":"61133","tlabel":"450961398","PhoneNumber":"11158","DeviceId":"abcd1234abcd1234","CallId":"10940-15480@198.24.63.39"},] (151)

NOTICE: evapi_recv_client(): {0} [198.24.63.45:48905] - received [147:{"event":"REGISTER","tindex":"25291","tlabel":"2047024302","PhoneNumber":"11132","DeviceId":"abcd1234abcd1234","CallId":"10914-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"61136","tlabel":"839735223","PhoneNumber":"11148","DeviceId":"abcd1234abcd1234","CallId":"10930-15480@198.24.63.39"},143:{"event":"REGISTER","tindex":"4562","tlabel":"6586867","PhoneNumber":"11149","DeviceId":"abcd1234abcd1234","CallId":"10931-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"43213","tlabel":"220429340","PhoneNumber":"11151","DeviceId":"abcd1234abcd1234","CallId":"10932-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"52174","tlabel":"708781916","PhoneNumber":"11150","DeviceId":"abcd1234abcd1234","CallId":"10933-15480@198.24.63.39"},147:{"event":"REGISTER","tindex":"34251","tlabel":"1354642017","PhoneNumber":"11153","DeviceId":"abcd1234abcd1234","CallId":"10935-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"7366","tlabel":"1368396808","PhoneNumber":"11154","DeviceId":"abcd1234abcd1234","CallId":"10936-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"25289","tlabel":"119788881","PhoneNumber":"11152","DeviceId":"abcd1234abcd1234","CallId":"10934-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"16327","tlabel":"971937029","PhoneNumber":"11155","DeviceId":"abcd1234abcd1234","CallId":"10937-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"22242","tlabel":"609737074","PhoneNumber":"11156","DeviceId":"abcd1234abcd1234","CallId":"10938-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"10720","tlabel":"930036340","PhoneNumber":"11157","DeviceId":"abcd1234abcd1234","CallId":"10939-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"61133","tlabel":"450961398","PhoneNumber":"11158","DeviceId":"abcd1234abcd1234","CallId":"10940-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"43210","tlabel":"639090568","PhoneNumber":"11160","Dev] (1899) (0)


evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"61133","tlabel":"450961398","PhoneNumber":"11158","DeviceId":"abcd1234abcd1234","CallId":"10940-15480@198.24.63.39"}] (146)

Sep 29 05:35:14 v39 /usr/local/kamailio-dev/sbin/kamailio[15387]: DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43da4b67e0] [146:{"event":"REGISTER","tindex":"4559","tlabel":"1701553747","PhoneNumber":"11159","DeviceId":"abcd1234abcd1234","CallId":"10941-15480@198.24.63.39"},] (151)

NOTICE: evapi [evapi_dispatch.c:290]: evapi_recv_client(): {0} [198.24.63.45:48905] - received [iceId":"abcd1234abcd1234","CallId":"10942-15480@198.24.63.39"},146:{"event":"REGISTER","tindex":"4559","tlabel":"1701553747","PhoneNumber":"11159","DeviceId":"abcd1234abcd1234","CallId":"10941-15480@198.24.63.39"},] (214) (88)

DEBUG: evapi [evapi_dispatch.c:370]: evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"4559","tlabel":"1701553747","PhoneNumber":"11159","DeviceId":"abcd1234abcd1234","CallId":"10941-15480@198.24.63.39"}] (146)

DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43d93c2a70] [146:{"event":"REGISTER","tindex":"43210","tlabel":"639090568","PhoneNumber":"11160","DeviceId":"abcd1234abcd1234","CallId":"10942-15480@198.24.63.39"},] (151)

DEBUG: evapi [evapi_dispatch.c:370]: evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"43210","tlabel":"639090568","PhoneNumber":"11160","DeviceId":"abcd1234abcd1234","CallId":"10942-15480@198.24.63.39"}] (146)

DEBUG: evapi [evapi_dispatch.c:353]: evapi_recv_client(): residual data [146:{"event":"REGISTER","tindex":"43210","tlabel":"639090568","PhoneNumber":"11160","Dev] (88)

DEBUG: evapi [evapi_dispatch.c:361]: evapi_recv_client(): frame size mismatch the ending char ("): [{"event":"REGISTER","tindex":"43210","tlabel":"639090568","PhoneNumber":"11160","Dev146:{"event":"REGISTER","tindex":"52171","tlabel":"748030241",] (146)

Logs for discarded message:
DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43da3e69a0] [146:{"event":"REGISTER","tindex":"52171","tlabel":"748030241","PhoneNumber":"11161","DeviceId":"abcd1234abcd1234","CallId":"10943-15480@198.24.63.39"},] (151)

NOTICE: evapi [evapi_dispatch.c:290]: evapi_recv_client(): {0} [198.24.63.45:48905] - received [146:{"event":"REGISTER","tindex":"52171","tlabel":"748030241","PhoneNumber":"11161","DeviceId":"abcd1234abcd1234","CallId":"10943-15480@198.24.63.39"},] (151) (88)

Logs for messages after the discarded message:
DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43da3e6aa0] [146:{"event":"REGISTER","tindex":"25286","tlabel":"809034258","PhoneNumber":"11163","DeviceId":"abcd1234abcd1234","CallId":"10944-15480@198.24.63.39"},] (151)

NOTICE: evapi [evapi_dispatch.c:290]: evapi_recv_client(): {0} [198.24.63.45:48905] - received [146:{"event":"REGISTER","tindex":"25286","tlabel":"809034258","PhoneNumber":"11163","DeviceId":"abcd1234abcd1234","CallId":"10944-15480@198.24.63.39"},] (151) (0)

DEBUG: evapi [evapi_dispatch.c:370]: evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"25286","tlabel":"809034258","PhoneNumber":"11163","DeviceId":"abcd1234abcd1234","CallId":"10944-15480@198.24.63.39"}] (146)

DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43d9598778] [146:{"event":"REGISTER","tindex":"34248","tlabel":"187029249","PhoneNumber":"11162","DeviceId":"abcd1234abcd1234","CallId":"10945-15480@198.24.63.39"},] (151)

NOTICE: evapi [evapi_dispatch.c:290]: evapi_recv_client(): {0} [198.24.63.45:48905] - received [146:{"event":"REGISTER","tindex":"34248","tlabel":"187029249","PhoneNumber":"11162","DeviceId":"abcd1234abcd1234","CallId":"10945-15480@198.24.63.39"},] (151) (0)

DEBUG: evapi [evapi_dispatch.c:370]: evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"34248","tlabel":"187029249","PhoneNumber":"11162","DeviceId":"abcd1234abcd1234","CallId":"10945-15480@198.24.63.39"}] (146)

DEBUG: evapi [evapi_dispatch.c:492]: evapi_recv_notify(): received [0x7f43d9598878] [145:{"event":"REGISTER","tindex":"7363","tlabel":"949153805","PhoneNumber":"11164","DeviceId":"abcd1234abcd1234","CallId":"10946-15480@198.24.63.39"},] (150)

NOTICE: evapi [evapi_dispatch.c:290]: evapi_recv_client(): {0} [198.24.63.45:48905] - received [145:{"event":"REGISTER","tindex":"7363","tlabel":"949153805","PhoneNumber":"11164","DeviceId":"abcd1234abcd1234","CallId":"10946-15480@198.24.63.39"},] (150) (0)

DEBUG: evapi [evapi_dispatch.c:370]: evapi_recv_client(): executing event route for frame: [{"event":"REGISTER","tindex":"7363","tlabel":"949153805","PhoneNumber":"11164","DeviceId":"abcd1234abcd1234","CallId":"10946-15480@198.24.63.39"}] (145)

Just in case if you need to see the NGREP trace for the above messages, it is here:
http://pastebin.com/4zTKmBJX

Thanks,

- Jayesh


On Tue, Sep 29, 2015 at 12:16 PM Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

can you send here the log messages printed by evapi that contain "] - received [" which have:

- the previous bunch of json documents that were processed ok (just before the one that was discarded)
- the bunch of json documents that were discarded
- the next bunch of json documents that were processed ok

The logs were sent on could of emails and pastebin, so it is hard to track them -- if you have the logs, just locate the log messages with the discarded json and send it here along with the previous and next logs.

Cheers,
Daniel


On 28/09/15 17:04, Jayesh Nambiar wrote:
Thank you daniel.
Yes, they all get printed by the evapi module even when they get discarded. If you once again check the paste-bin, the logs pasted as Kamailio Logs are all discarded packets but show up as received by evapi module.
I believe they got discarded because a packet that came before them was partial and evapi discarded the remaining part of the message in the new packet and encountered error.
- Jayesh

On Mon, Sep 28, 2015 at 11:13 AM Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

I will look over it during next days.

One more thing, are the packages sent by you printed by evapi module, even not they are not processed (but discarded)?

Cheers,
Daniel


-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com