[alert] could not add new SSL session to the session cache while SSL handshaking

[Reid, Mike]

I am experiencing the following in my error logs after a recent upgrade to NGiNX 1.5.10 (from 1.5.8), and also applying SSL / TLS updates as described on istlsfastyet.com

[alert] 3319#0: *301399 could not add new SSL session to the session cache while SSL handshaking

Any ideas on why these alerts would now be showing up? I am not sure how to address, or whether there should be cause for concern?

NGiNX 1.5.10 w/ SPDY 3.1 # Previously 1.5.8, now including --with-http_spdy_module and using openssl-1.0.1f (previously openssl-1.0.1e without http_spdy_module)
ssl_session_cache shared:SSL:10m; # No change
ssl_buffer_size 1400; # New
ssl_session_timeout 24h; # Previously 10m
ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2; # No change


If there's anything else I can provide to assist troubleshooting, please let me know.

Thanks,
- Mike
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