Hi, Juha

This issue is discussed here https://github.com/kamailio/kamailio/pull/1376

As temporary solution i use jsonrpcs fifo for big results.

For example

cat /tmp/kamailio_jsonrpc_reply_fifo > lastcontact.dump & echo '{"jsonrpc": "2.0", "method": "htable.dump", "params":["last_contact"], "reply_name": "kamailio_jsonrpc_reply_fifo", "id": 1 }' > /tmp/kamailio_jsonrpc.fifo

On 15 August 2018 at 18:23, Juha Heinanen <jh@tutpro.com> wrote:

I tried to issue mtree.list command using xmlrpc query that would result
in large response, and got error

Aug 15 18:12:07 char /usr/bin/sip-proxy[10348]: ERROR: <core> [core/tcp_main.c:618]: _wbufq_add(): (221375 bytes): write queue full or timeout (0, total 0, last write 55534052 s ago)
Aug 15 18:12:07 char /usr/bin/sip-proxy[10348]: ERROR: xmlrpc [xmlrpc.c:811]: send_reply(): Error while sending reply
Aug 15 18:12:07 char /usr/bin/sip-proxy[10367]: ERROR: <core> [core/tcp_main.c:3551]: handle_ser_child(): received CON_ERROR for 0x7f112ad22be0 (id 5), refcnt 3, flags 0x4018

I though that perhaps I could get rid of the error by increasing value
of core var tcp_conn_wq_max. Description of the var tells:

Maximum bytes queued for write allowed per connection. Attempting to
queue more bytes would result in an error and in the connection being
closed (too slow). If tcp_write_buf is not enabled, it has no effect.

What is tcp_write_buf and how to enable it? I could not find anything
about it in core cookbook.

-- Juha

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Savolainen Dmitri