The terms, "Reside in Canada" are not defined anywhere in the Immigration Act. The question is whether a sponsor(who is a PR) has centralised their mode of living in Canada. There are few cases listed below, particularly case #2 and they won their hearing.
In the OP's case, going away for 6 months is risky because he is likely to spend over 183 days outside Canada, which will make him a non-resident for tax purposes, and CIC will likely use this angle to bolster their case.
See this: http://www.irb-cisr.gc.ca/Eng/BoaCom/references/LegJur/Documents/SpoPar_e.pdf
“Resides in Canada” for section 130(1)(b) of the Regulations can be established by
evidence of presence on Canadian soil and involvement in day-to-day activities not requiring
absence abroad.(4) Physical absence from Canada may not constitute an interruption of residence
in Canada.(5) The question is whether a sponsor has centralized their mode of living in Canada.(6)
1) footnote (5): http://www.canlii.org/en/ca/irb/doc/2004/2004canlii56726/2004canlii56726.html?searchUrlHash=AAAAAQANSUFEIFRBMy0xMDU1NgAAAAAB
2) footnote (6): http://www.canlii.org/en/ca/irb/doc/2004/2004canlii56686/2004canlii56686.html?searchUrlHash=AAAAAQANSUFEIE1BMy0wMjQ5MQAAAAAB
Hopefully, this helps clarify things.
scylla said:
It depends. If you are a Canadian citizen, go ahead with your plans. If you are a PR, then you can't leave Canada for six months or the sponsorship application will be refused since you are no longer making Canada your primary home. If you are a PR, you should limit your trip to three weeks to avoid putting the sponsorship application in jeopardy.