Also looks as to this issue relevant to another use case. After call established on RTPengine host I execute ``` rtpengine-ctl set maxsessions 0 ``` Now when Kamailio receives ReINVITE in Kamailio log I can see ``` 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one10(32768) ERROR: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2658]: rtpp_function_call(): queried nodes limit reached ``` If here will be added carriage returns and line feed symbols, then we can see. ``` 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) INFO: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2701]: rtpp_function_call(): proxy udp6:rtp-us-east-1a-7.nga911.com:2223 has reached its load limit (Parallel session limit reached) - trying next one 10(32768) ERROR: {1 34826098 INVITE e139ffde-a05a-11eb-8f1b-f7192ebf791d} rtpengine [rtpengine.c:2658]: rtpp_function_call(): queried nodes limit reached ``` According to logs rtpengine Kamailio module 1. do not use other available RTPengine nodes, during a test available another RTPengine node; 2. send again and again request to same failed not available RTPengine node.