[Bug 1128] New: context inappropriate connection sharing logic incomplete

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Bug ID	1128
Summary	context inappropriate connection sharing logic incomplete
Product	pcp
Version	unspecified
Hardware	All
OS	Linux
Status	NEW
Severity	major
Priority	P5
Component	pcp
Assignee	pcp@kenj.com.au
Reporter	fche@redhat.com
CC	pcp@oss.sgi.com
Classification	Unclassified

Connection sharing protections in commit ec7da652c etc. does not do a complete
job: it ignores that pmDupContext and subsequent pmStore container-changing on
one copy will affect both clients.  Similarly, two container-less
pmNewContexts, one of which gets a container-changing pmstore.  Problem found
by inspection.  Indirectly confirmable by number of connections / pmcd.client
tuples associated with such an application: just 1. 

http://oss.sgi.com/pipermail/pcp/2015-October/008595.html

PS.  The pmcd.client* metrics should be documented with respect to their
peculiar pmStore semantics (incoming instance#s ignored & redirected to the
current client, which makes sense because the instance numbers aren't
meaningful to pmapi clients in the first place).

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