2631528 - The std_server.out file size is increasing, flooded with CPIC logs

Size of std_server*.out files are increasing rapidly (can be even more than 5 gigabytes). File size increasing stops only after resaving CPIC trace level in nwa from 0 to 1, and then back to 0.

In std_server*.out file you can see the following logs for example:

[Thr 70356924625216] STIRCV:START: {root-id=E1XXXXXXXXXXXXXXX00000000000144C}_{conn-id=5XXXXXXXXXXXXX00000AE12225}_0
[Thr 70356924625216] *************** STIRCV ***************
[Thr 70356924625216] STIRCV: conversation_ID: XXXXXXXX
[Thr 70356924625216] STIRCV: requested_length: 16000 bytes
[Thr 70356924625216] STIRCV: use local buffer
[Thr 70356924625216] STIRCV: local CPIC receive
[Thr 70356924625216] STIRCV: new buffer state = BUFFER_EMPTY
[Thr 70356924625216] STIAsRcvFromGw: timeout value: -1
[Thr 70356924625216] STINiRead(49,3ffe3817b9f0,34128,-1)
[Thr 70356924625216] STINiRead ok, readlen = 1808
[Thr 70356924625216] STIAsRcvFromGw: Receive from Gateway o.k. (1808 bytes)
[Thr 70356924625216] STIRCV: rem code page = >4102<
[Thr 70356924625216] STIRCV: use local buffer
[Thr 70356924625216] STIRCV: data_received: CM_COMPLETE_DATA_RECEIVED
[Thr 70356924625216] STIRCV: received_length: 1728
[Thr 70356924625216] STIRCV: status_received: CM_SEND_RECEIVED
[Thr 70356924625216] STIRCV: request_to_send_received: CM_REQ_TO_SEND_NOT_RECEIVED
[Thr 70356924625216] Address Offset received raw data from gateway (user data)
[Thr 70356924625216] ------------------------------------------------------------------------
[Thr 70356924625216] 3ffe38210cb0 000000 01010008 01020101 01010000 01010103 |................|
[Thr 70356924625216] 3ffe38210cc0 000016 00040000 060b0103 0106000b 04010002 |................|
[Thr 70356924625216] 3ffe38210cd0 000032 01030200 00002301 06012700 a0312d37 |......#...'..1-7|
[Thr 70356924625216] 3ffe38210ce0 000048 392d322d 32363531 332d332d 302d342d |9-2-26513-3-0-4-|
[Thr 70356924625216] 3ffe38210cf0 000064 342d352d 31302e32 32352e33 342e3337 |4-5-10.225.34.37|
[Thr 70356924625216] 3ffe38210d00 000080 2d362d73 61706777 31372d37 2d302e30 |-6-sapgw17-7-0.0|
[Thr 70356924625216] 3ffe38210d10 000096 2e302e30 2d31372d 31302e32 32352e33 |.0.0-17-10.225.3|
[Thr 70356924625216] 3ffe38210d20 000112 342e3337 2d31382d 302e302e 302e302d |4.37-18-0.0.0.0-|
[Thr 70356924625216] 3ffe38210d30 000128 392d452d 31302d30 2d31312d 3235352d |9-E-10-0-11-255-|
[Thr 70356924625216] 3ffe38210d40 000144 31322d30 2d31332d 302d3134 2d342d31 |12-0-13-0-14-4-1|
[Thr 70356924625216] 3ffe38210d50 000160 362d4431 372d3135 2d394139 31433831 |6-D17-15-9A91C81|

[...]

[Thr 70356924625216] STSEND:START: {root-id=E1200000XXXXXXXXXXXXXXX0000000144C}_{conn-id=5A84XXXXXXXXXXXXXXXXX10000000AE12225}_0
[Thr 70356924625216] *************** STSEND ***************
[Thr 70356924625216] STSEND: conversation_ID: XXXXXXXXX
[Thr 70356924625216] STSEND: streaming active for XXXXXXXXX, normal CPIC RECEIVE
[Thr 70356924625216] STSEND: new buffer state = BUFFER_DATA
[Thr 70356924625216] STSEND: 1054 bytes buffered
[Thr 70356924625216] STISearchConv: found conv without search

[...]

[Thr 70361930527040] LOCATION CPIC (TCP/IP) on local host with Unicode
[Thr 70361930527040] ERROR hostname '<HOSTNAME>' unknown
[Thr 70361930527040] TIME Tue Feb 20 09:30:27 2018
[Thr 70361930527040] RELEASE 745
[Thr 70361930527040] COMPONENT NI (network interface)
[Thr 70361930527040] VERSION 40
[Thr 70361930527040] RC -2
[Thr 70361930527040] MODULE /bas/745_REL/src/base/ni/niuxi.c
[Thr 70361930527040] LINE 1759
[Thr 70361930527040] DETAIL NiPGetHostByName: '<HOSTNAME>' not found
[Thr 70361930527040] SYSTEM CALL getaddrinfo
[Thr 70361930527040] COUNTER 2

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CPIC, trace level, 3:Full CPIC trace, std_server, large file size, increasing, destinations, destination, RFC destination, XI_IDOC_DEFAULT, CPIC_TRACE , KBA , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , BC-XI-CON , Connectivity , BC-MID-CON-JCO , Java-Connector , BC-CST-GW , Gateway/CPIC , Problem