MySQL Bugs: #49099: network_address_set_address should be reentrant (mt-safe)

Bug #49099	network_address_set_address should be reentrant (mt-safe)
Submitted:	25 Nov 2009 13:06	Modified:	9 Jan 2015 10:34
Reporter:	Dyre Tjeldvoll	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Proxy: Core	Severity:	S4 (Feature request)
Version:	0.7.0	OS:	Any
Assigned to:	Assigned Account	CPU Architecture:	Any

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Description:
network_address_set_address()->network_address_set_address_ip() calls gethostbyname() which is not reentrant. This means that an mt-plugin must guard all calls to network_address_set_address() with a mutex. Which is doable, but somewhat inconvenient.

How to repeat:
Create mt-plugin with multiple threads which call network_address_set_address(). 

Suggested fix:
If proxy itself decides to go mt gethostbyname will probably have to be changed to gethostbyname_r.