In addition to the fix for Matt Woodley's post "Potential memory leak in sFlow API" on 10/05/09, I think the "hash_nxt" pointer to the sampler also needs to be preserved when resetting the sampler. If a sampler which is stored at a jumptable index (head of list for that slot) gets reset, it currently loses the reference to the remaining sampler list members that share that hash table slot.
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