Werk #7570: Fixed potential deadlock when talking to rrdcached

Component	Other components
Title	Fixed potential deadlock when talking to rrdcached
Date	Feb 25, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously the FECTH command could cause deadlocks when encountering some border cases, caused by incorrect lock handling. This has been fixed now.

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