[SR-Users] Large Content-Length crash with instant message

Hi All, I'm playing with instant messaging with a PJSIP client, but as soon as I send body with payload to about 100k I'm getting the error below: Apr 28 09:16:52 ip-10-227-0-26 /usr/sbin/kamailio[2909]: ERROR: <core> [tcp_main.c:715]: _wbufq_add(): ERROR: wbufq_add(40552 bytes): write queue full or timeout (0, total 0, last write 51946505 s ago) Apr 28 09:16:52 ip-10-227-0-26 /usr/sbin/kamailio[2909]: ERROR: tm [../../forward.h:240]: msg_send(): msg_send: ERROR: tcp_send failed Apr 28 09:16:52 ip-10-227-0-26 /usr/sbin/kamailio[2910]: ERROR: <core> [tcp_main.c:3638]: handle_ser_child(): handle_ser_child: ERROR: received CON_ERROR for 0xb30ddcd8 (id 352), refcnt 2, flags 0x5092 Apr 28 09:16:52 ip-10-227-0-26 /usr/sbin/kamailio[2909]: ERROR: tm [t_fwd.c:1609]: t_send_branch(): ERROR: t_send_branch: sending request on branch 0 failed Apr 28 09:16:52 ip-10-227-0-26 /usr/sbin/kamailio[2909]: ERROR: sl [sl_funcs.c:387]: sl_reply_error(): ERROR: sl_reply_error used: Unfortunately error on sending to next hop occurred (477/SL) And the app get SIP/2.0 477 Unfortunately error on sending to next hop occurred (477/SL) Via: SIP/2.0/TLS XX.XX.XX.XX:55859;rport=55859;branch=z9hG4bKPjkkazEy.XcjJkYDCEzwbwUVAONDzcCN8t;alias From: <sip:aaaaa@test.net>;tag=9gcb.Ay3wSCZNFgs8PNCbdkRq7jfxbDx To: <sip:bbbbb@test.net>;tag=9a285338e10af1c086406d08dc7f5d79.e457 Call-ID: v9JlsK1AEH4So8AIEfqiGuUOEx5Fub1C CSeq: 28450 MESSAGE Server: kamailio (4.1.3 (i386/linux)) Content-Length: 0 --end msg-- Kamailio is already set with tcp_rd_buf_size=204800 Does anyone can suggest how to fix this? Thanks in advance, Roberto Fichera.