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[wiki] / bugs / send_meta_called_with_NULL_pointer

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+[[!meta author="Chris Maciejewski"]]
+
+I am running tinc (1.0.19) on a cluster of around 40 servers (Xen
+virtual machines in two geographical locations). Overall it works very
+well, however yesterday it crashed on two machines in odd way. I was
+still able to ping VPN IPs of other hosts from the two affected
+machines but "vpn" interface was not visible when I run ifconfig.
+There was also no "tincd" process running (at least ps aux wasn't
+showing it). They logged the following for approx. 20 minutes in the
+/var/log/syslog:
+
+    Mar 27 01:52:14 us16 tinc.vpn[9528]: Flushing meta data to <peer_host> (xxx.xxx.xxx.xxx port 655) failed: Connection reset by peer
+
+and eventually:
+
+    Mar 27 01:53:03 us16 tinc.vpn[9528]: send_meta() called with NULL pointer!