tree 7058cb457380f1650dd909e0822f5dd47e7c05ed
parent af4bd0867a6ef4ca219bf97fee5205fa928be4ab
author Thierry FOURNIER <thierry.fournier@ozon.io> 1527253430 +0200
committer Willy Tarreau <w@1wt.eu> 1527757121 +0200
encoding latin1

BUG/MAJOR: lua: Dead lock with sockets

In some cases, when we are waiting for data and the socket
timeout expires, we have a dead lock. The Lua socket locks
the applet socket, and call for a notify. The notify
immediately executes code and try to acquire the same lock,
so ... dead lock.

stream_int_notify() cant be used because it wakeup the applet
task only if the stream have changes. The changes are forces
by Lua, but not repported on the stream.

stream_int_update_applet() cant be used because the deadlock.

So, I inconditionnaly wakeup the applet. This wake is performed
asynchronously, and will call a stream_int_notify().

This patch must be backported in 1.6, 1.7 and 1.8