错误：8 - CURL错误：GnuTLS recv错误（-9）：收到意外长度的TLS数据包

Question

I have infusionsoft api lib running on my server. In the code, I have to find contacts in infusionsoft using their method dsFind. If I use 5 as the limit to fetch no of contacts, it is working fine but when I make it more than 10, it is throwing below error:

ERROR: 8 - CURL error: GnuTLS recv error (-9): A TLS packet with unexpected length was received.

The same code is working fine on some other server.

Answer 1

The problem relies on the fact that GnuTLS deals seriously with TLS protocol. Nikos Mavrogiannopoulos explains this fact in a message on the gnutls-devel mailling list:

Several sites terminate the TLS connection without following the TLS protocol (i.e. sending closure alerts), but rather terminate the TCP connection directly. This is a relic of SSLv2 and it seems other implementations ignore this error. GnuTLS doesn't and thus prints this error. You could ignore it, but then you could not distinguish between a premature connection termination (i.e. by someone injecting a stray TCP termination packet) and normal termination.