brewery_beers view fails because map function emits keys that are too long (key_too_long)

steps to repro:

load sample database during the setup wizard

for this map function:
function(doc, meta) {
if (doc.geo)

{ emit([meta.id.replace('brewery_', '')], doc); }

else if (doc.brewery && typeof doc.brewery === 'string')

{ emit([doc.brewery.replace(' ', '_'), meta.id.replace('beer_', '')], doc); }

}
which is the brewery_beers view
then run this query

http://localhost:8092/beer-sample/_design/beer/_view/brewery_beers?stale=false&connection_timeout=60000&limit=10&skip=0

{"error":"error","reason":"

{key_too_long,<<17,117,91,34,100,101,115,99,114,105,112,116,105,111,110,34,44,\n 34,65,108,108,97,103,97,115,104,32,66,114,101,119,105,110,103,\n 32,67,111,109,112,97,110,121,32,115,111,108,100,32,105,116,\n 115,32,102,105,114,115,116,32,98,97,116,99,104,32,111,102,32,\n 98,101,101,114,32,105,110,32,116,104,101,32,115,117,109,109,\n 101,114,32,111,102,32,49,57,57,53,46,32,84,104,101,32,65,108,\n 108,97,103,97,115,104,32,115,116,111,114,121,44,32,104,111,\n 119,101,118,101,114,44,32,104,97,115,32,114,111,111,116,115,\n 32,116,104,97,116,32,103,111,32,109,117,99,104,32,102,117,114,\n 116,104,101,114,32,98,97,99,107,32,116,104,101,110,32,116,104,\n 101,32,116,101,110,32,121,101,97,114,115,32,116,104,101,32,80,\n 111,114,116,108,97,110,100,44,32,77,97,105,110,101,32,98,114,\n 101,119,101,114,121,32,104,97,115,32,98,101,101,110,32,105,\n 110,32,111,112,101,114,97,116,105,111,110,46,32,84,104,101,32,\n 114,111,111,116,115,32,103,111,32,105,110,116,111,32,116,104,\n 101,32,101,97,114,108,121,32,49,57,57,48,39,115,32,119,104,\n 101,110,32,102,111,117,110,100,101,114,32,82,111,98,32,84,111,\n 100,32,115,97,119,32,115,111,109,101,116,104,105,110,103,32,\n 109,105,115,115,105,110,103,32,105,110,32,116,104,101,32,65,\n 109,101,114,105,99,97,110,32,98,101,101,114,32,109,97,114,107,\n 101,116,46,32,84,104,101,121,32,97,114,101,32,105,110,116,101,\n 114,119,111,118,101,110,32,105,110,32,116,104,101,32,99,114,\n 97,102,116,32,98,114,101,119,105,110,103,32,109,111,118,101,\n 109,101,110,116,32,116,104,97,116,32,104,97,115,32,97,108,108,\n 111,119,101,100,32,116,104,101,32,99,114,101,97,116,105,118,\n 105,116,121,32,111,102,32,98,114,101,119,101,114,115,32,116,\n 111,32,102,108,111,117,114,105,115,104,32,111,118,101,114,32,\n 116,104,101,32,108,97,115,116,32,116,119,101,110,116,121,32,\n 121,101,97,114,115,44,32,97,110,100,32,116,104,111,115,101,32,\n 115,97,109,101,32,114,111,111,116,115,32,104,97,118,101,32,\n 116,105,101,115,32,116,104,97,116,32,103,111,32,98,97,99,107,\n 32,99,101,110,116,117,114,105,101,115,45,116,111,32,116,104,\n 101,32,109,111,110,97,115,116,101,114,105,101,115,32,111,102,\n 32,66,101,108,103,105,117,109,44,32,119,104,111,115,101,32,\n 111,119,110,32,97,110,99,105,101,110,116,32,98,114,101,119,\n 105,110,103,32,109,101,116,104,111,100,115,32,97,114,101,32,\n 110,111,119,32,112,114,97,99,116,105,99,101,100,32,116,111,\n 100,97,121,32,98,121,32,116,104,101,32,98,114,101,119,101,114,\n 115,32,111,102,32,65,108,108,97,103,97,115,104,46,32,65,108,\n 108,97,103,97,115,104,32,98,101,103,97,110,32,97,115,32,97,32,\n 111,110,101,45,109,97,110,32,111,112,101,114,97,116,105,111,\n 110,44,32,119,105,116,104,32,84,111,100,32,97,115,115,117,109,\n 105,110,103,32,97,108,108,32,98,114,101,119,105,110,103,32,\n 100,117,116,105,101,115,32,105,110,32,97,32,115,109,97,108,\n 108,32,115,112,97,99,101,32,108,111,99,97,116,101,100,32,105,\n 110,32,97,32,98,117,105,108,100,105,110,103,32,111,110,32,116,\n 104,101,32,111,117,116,115,107,105,114,116,115,32,111,102,32,\n 116,104,101,32,109,97,114,105,116,105,109,101,32,99,105,116,\n 121,32,111,102,32,80,111,114,116,108,97,110,100,46,32,84,111,\n 100,32,104,97,100,32,119,111,114,107,101,100,32,105,110,32,98,\n 114,101,119,101,114,121,32,115,101,116,116,105,110,103,115,32,\n 98,101,102,111,114,101,32,97,110,100,32,114,101,99,111,103,\n 110,105,122,101,100,32,97,32,118,111,105,100,32,119,105,116,\n 104,105,110,32,116,104,101,32,99,114,97,102,116,32,98,114,101,\n 119,105,110,103,32,109,111,118,101,109,101,110,116,46,32,87,\n 104,105,108,101,32,98,111,116,104,32,71,101,114,109,97,110,32,\n 97,110,100,32,66,114,105,116,105,115,104,32,115,116,121,108,\n 101,115,32,104,97,100,32,98,101,99,111,109,101,32,112,114,101,\n 118,97,108,101,110,116,32,116,104,114,111,117,103,104,111,117,\n 116,32,116,104,101,32,85,46,83,46,44,32,116,104,101,32,101,\n 118,101,114,45,99,114,101,97,116,105,118,101,32,66,101,108,\n 103,105,97,110,45,115,116,121,108,101,115,32,119,101,114,101,\n 32,118,101,114,121,32,100,105,102,102,105,99,117,108,116,32,\n 116,111,32,102,105,110,100,46,32,84,104,114,111,117,103,104,\n 32,104,105,115,32,116,114,97,118,101,108,115,44,32,84,111,100,\n 32,104,97,100,32,115,97,109,112,108,101,100,32,109,97,110,121,\n 32,111,102,32,116,104,101,115,101,32,117,110,105,113,117,101,\n 32,98,101,101,114,115,32,97,110,100,32,102,101,108,116,32,116,\n 104,97,116,32,116,104,101,32,102,108,97,118,111,114,115,32,97,\n 110,100,32,116,114,97,100,105,116,105,111,110,115,32,111,102,\n 32,116,104,105,115,32,69,117,114,111,112,101,97,110,32,110,97,\n 116,105,111,110,32,110,101,101,100,101,100,32,116,111,32,98,\n 101,32,115,104,97,114,101,100,32,119,105,116,104,32,116,104,\n 101,32,65,109,101,114,105,99,97,110,32,100,114,105,110,107,\n 105,110,103,32,112,117,98,108,105,99,46,32,72,101,32,100,101,\n 115,105,103,110,101,100,32,97,32,115,109,97,108,108,32,49,53,\n 45,98,97,114,114,101,108,32,98,114,101,119,104,111,117,115,\n 101,32,115,112,101,99,105,102,105,99,97,108,108,121,32,116,\n 111,32,101,109,98,114,97,99,101,32,116,104,101,32,66,101,108,\n 103,105,97,110,32,116,114,97,100,105,116,105,111,110,32,111,\n 102,32,98,101,101,114,32,109,97,107,105,110,103,44,32,103,97,\n 116,104,101,114,101,100,32,116,104,101,32,102,105,110,101,115,\n 116,32,97,114,114,97,121,32,111,102,32,97,117,116,104,101,110,\n 116,105,99,32,114,97,119,32,109,97,116,101,114,105,97,108,115,\n 32,97,110,100,32,98,101,103,97,110,32,104,105,115,32,113,117,\n 101,115,116,32,116,111,119,97,114,100,115,32,116,104,101,32,\n 112,114,111,100,117,99,116,105,111,110,32,111,102,32,116,114,\n 97,100,105,116,105,111,110,97,108,32,66,101,108,103,105,97,\n 110,32,115,116,121,108,101,32,97,108,101,115,46,32,65,108,108,\n 97,103,97,115,104,32,98,101,103,97,110,32,119,105,116,104,32,\n 116,104,101,32,114,101,108,101,97,115,101,32,111,102,32,105,\n 116,115,32,65,108,108,97,103,97,115,104,32,87,104,105,116,101,\n 44,32,109,111,100,101,108,101,100,32,97,102,116,101,114,32,\n 116,104,101,32,116,114,97,100,105,116,105,111,110,97,108,32,\n 87,104,105,116,101,32,98,101,101,114,115,32,111,102,32,66,101,\n 108,103,105,117,109,46,32,65,108,115,111,32,114,101,102,101,\n 114,114,101,100,32,116,111,32,97,115,32,119,105,116,32,98,101,\n 101,114,115,44,32,116,104,101,121,32,103,101,116,32,116,104,\n 101,105,114,32,117,110,105,113,117,101,32,102,108,97,118,111,\n 114,32,102,114,111,109,32,116,104,101,32,117,115,101,32,111,\n 102,32,119,104,101,97,116,32,105,110,32,112,108,97,99,101,32,\n 111,102,32,98,97,114,108,101,121,44,32,67,117,114,97,99,97,\n 111,32,111,114,97,110,103,101,32,112,101,101,108,32,97,110,\n 100,32,116,104,101,32,99,97,114,101,102,117,108,32,115,112,\n 114,105,110,107,108,105,110,103,32,111,102,32,99,111,114,105,\n 97,110,100,101,114,32,97,110,100,32,111,116,104,101,114,32,\n 115,112,105,99,101,115,46,32,65,108,108,97,103,97,115,104,32,\n 99,111,109,98,105,110,101,100,32,116,104,101,115,101,32,105,\n 110,103,114,101,100,105,101,110,116,115,32,119,105,116,104,32,\n 116,104,101,105,114,32,118,101,114,121,32,111,119,110,32,112,\n 114,111,112,114,105,101,116,97,114,121,32,66,101,108,103,105,\n 97,110,32,121,101,97,115,116,32,115,116,114,97,105,110,32,116,\n 111,32,99,114,101,97,116,101,32,116,104,101,32,114,101,109,97,\n 114,107,97,98,108,121,32,117,110,105,113,117,101,32,97,110,\n 100,32,114,101,102,114,101,115,104,105,110,103,32,98,101,101,\n 114,32,116,104,97,116,32,105,115,32,116,111,100,97,121,32,116,\n 104,101,105,114,32,102,108,97,103,115,104,105,112,32,98,114,\n 97,110,100,46,32,65,108,108,97,103,97,115,104,32,87,104,105,\n 116,101,32,100,101,118,101,108,111,112,101,100,32,97,32,115,\n 116,114,111,110,103,32,99,117,108,116,32,102,111,108,108,111,\n 119,105,110,103,32,97,114,111,117,110,100,32,116,104,101,32,\n 80,111,114,116,108,97,110,100,32,97,114,101,97,32,119,104,101,\n 114,101,32,105,116,32,119,97,115,32,97,118,97,105,108,97,98,\n 108,101,32,97,116,32,115,101,108,101,99,116,101,100,32,100,\n 114,97,102,116,32,97,99,99,111,117,110,116,115,46,32,68,117,\n 101,32,116,111,32,105,116,115,32,105,109,109,101,100,105,97,\n 116,101,32,115,117,99,99,101,115,115,44,32,116,104,101,32,98,\n 101,101,114,32,119,97,115,32,115,111,111,110,32,109,97,100,\n 101,32,97,118,97,105,108,97,98,108,101,32,105,110,32,49,50,45,\n 111,117,110,99,101,32,115,105,120,45,112,97,99,107,115,32,116,\n 104,114,111,117,103,104,111,117,116,32,116,104,101,32,115,116,\n 97,116,101,32,111,102,32,77,97,105,110,101,46,32,87,105,116,\n 104,32,116,104,101,32,115,117,99,99,101,115,115,32,111,102,32,\n 116,104,101,32,102,105,114,115,116,32,98,114,97,110,100,44,32,\n 82,111,98,32,114,101,97,108,105,122,101,100,32,116,119,111,32,\n 116,104,105,110,103,115,58,32,84,104,101,32,112,117,98,108,\n 105,99,32,119,97,115,32,97,115,107,105,110,103,32,102,111,114,\n 32,115,111,109,101,32,110,101,119,32,115,116,121,108,101,115,\n 32,97,110,100,32,116,104,101,32,119,111,114,107,108,111,97,\n 100,32,119,97,115,32,103,101,116,116,105,110,103,32,116,111,\n 32,98,101,32,116,111,111,32,109,117,99,104,32,102,111,114,32,\n 111,110,101,32,112,101,114,115,111,110,46,32,83,111,111,110,\n 32,97,102,116,101,114,44,32,116,119,111,32,101,120,112,101,\n 114,105,101,110,99,101,100,32,98,114,101,119,101,114,115,32,\n 119,101,114,101,32,104,105,114,101,100,32,97,110,100,32,65,\n 108,108,97,103,97,115,104,32,114,101,108,101,97,115,101,100,\n 32,116,104,101,105,114,32,115,101,99,111,110,100,32,98,114,\n 101,119,44,32,65,108,108,97,103,97,115,104,32,68,111,117,98,\n 108,101,32,65,108,101,46,32,85,115,105,110,103,32,116,104,101,\n 32,112,104,105,108,111,115,111,112,104,121,32,97,110,100,32,\n 116,101,99,104,110,105,113,117,101,115,32,99,114,101,97,116,\n 101,100,32,98,121,32,116,104,101,32,84,114,97,112,112,105,115,\n 116,32,77,111,110,107,115,32,111,102,32,66,101,108,103,105,\n 117,109,32,99,101,110,116,117,114,105,101,115,32,97,103,111,\n 44,32,116,104,101,32,115,116,97,102,102,32,99,114,101,97,116,\n 101,100,32,116,104,105,115,32,98,101,101,114,32,117,115,105,\n 110,103,32,115,101,118,101,110,32,100,105,102,102,101,114,101,\n 110,116,32,109,97,108,116,115,44,32,97,32,116,114,97,100,105,\n 116,105,111,110,97,108,32,115,117,103,97,114,44,32,97,110,100,\n 32,116,104,101,105,114,32,111,119,110,32,66,101,108,103,105,\n 97,110,32,121,101,97,115,116,32,115,116,114,97,105,110,46,32,\n 84,104,101,32,114,101,115,117,108,116,32,119,97,115,32,97,110,\n 111,116,104,101,114,32,117,110,105,113,117,101,32,121,101,116,\n 32,98,97,108,97,110,99,101,100,32,98,101,101,114,32,99,114,97,\n 102,116,101,100,32,105,110,32,116,104,101,32,99,108,97,115,\n 115,105,99,32,66,101,108,103,105,97,110,32,115,116,121,108,\n 101,46,32,84,111,32,116,114,117,108,121,32,97,112,112,114,101,\n 99,105,97,116,101,32,116,104,101,32,99,108,97,115,115,105,99,\n 32,115,116,121,108,101,115,32,97,110,100,32,98,114,101,119,\n 105,110,103,32,116,114,97,100,105,116,105,111,110,115,32,111,\n 102,32,66,101,108,103,105,117,109,44,32,111,110,101,32,109,\n 117,115,116,32,101,120,112,101,114,105,101,110,99,101,32,98,\n 101,101,114,32,99,114,101,97,116,101,100,32,105,110,32,116,\n 104,101,32,99,108,97,115,115,105,99,32,66,101,108,103,105,97,\n 110,32,112,97,99,107,97,103,101,46,32,84,104,105,115,32,105,\n 115,32,119,104,121,32,65,108,108,97,103,97,115,104,44,32,97,\n 102,116,101,114,32,97,110,32,101,120,116,101,110,115,105,118,\n 101,32,112,101,114,105,111,100,32,111,102,32,114,101,115,101,\n 97,114,99,104,44,32,114,101,108,101,97,115,101,100,32,116,104,\n 101,105,114,32,100,105,115,116,105,110,99,116,105,118,101,32,\n 82,101,115,101,114,118,101,32,108,105,110,101,32,111,102,32,\n 99,111,114,107,32,102,105,110,105,115,104,101,100,32,55,53,48,\n 32,77,76,32,98,111,116,116,108,101,115,46,32,84,104,105,115,\n 32,117,110,105,113,117,101,32,108,105,110,101,32,101,109,112,\n 108,111,121,115,32,116,104,101,32,97,110,99,105,101,110,116,\n 32,116,114,97,100,105,116,105,111,110,32,114,101,102,101,114,\n 114,101,100,32,116,111,32,97,115,32,116,104,101,32,109,195,\n 131,194,169,116,104,111,100,101,32,99,104,97,109,112,101,110,\n 111,105,115,101,46,32,84,104,101,32,116,101,99,104,110,105,\n 113,117,101,32,99,97,108,108,115,32,102,111,114,32,116,119,\n 111,32,102,101,114,109,101,110,116,97,116,105,111,110,115,44,\n 32,111,110,101,32,105,110,32,116,104,101,32,66,114,101,119,\n 101,114,121,39,115,32,102,101,114,109,101,110,116,105,110,103,\n 32,116,97,110,107,115,32,97,110,100,32,116,104,101,32,115,101,\n 99,111,110,100,32,105,110,32,116,104,101,32,98,111,116,116,\n 108,101,32,105,116,115,101,108,102,46,32,73,116,32,105,115,32,\n 116,104,105,115,32,115,101,99,111,110,100,32,102,101,114,109,\n 101,110,116,97,116,105,111,110,32,116,104,97,116,32,112,114,\n 111,100,117,99,101,115,32,97,32,110,111,116,97,98,108,101,32,\n 105,110,99,114,101,97,115,101,32,105,110,32,99,97,114,98,111,\n 110,97,116,105,111,110,44,32,97,32,115,111,102,116,101,114,32,\n 109,111,117,116,104,102,101,101,108,44,32,97,110,100,32,98,\n 101,101,114,115,32,111,102,32,114,101,109,97,114,107,97,98,\n 108,101,32,99,111,109,112,108,101,120,105,116,121,46,32,84,\n 104,105,115,32,109,101,116,104,111,100,32,111,102,32,98,111,\n 116,116,108,101,32,99,111,110,100,105,116,105,111,110,105,110,\n 103,32,108,101,97,118,101,115,32,97,32,115,109,97,108,108,32,\n 97,109,111,117,110,116,32,111,102,32,121,101,97,115,116,32,\n 105,110,32,116,104,101,32,98,111,116,116,108,101,44,32,99,114,\n 101,97,116,105,110,103,32,119,104,97,116,32,105,115,32,107,\n 110,111,119,110,32,97,115,32,97,32,108,105,118,105,110,103,32,\n 98,101,101,114,46,32,65,115,32,97,32,114,101,115,117,108,116,\n 44,32,116,104,101,115,101,32,115,116,121,108,101,115,32,104,\n 97,118,101,32,97,32,103,114,101,97,116,108,121,32,101,110,104,\n 97,110,99,101,100,32,115,104,101,108,102,32,108,105,102,101,\n 32,97,110,100,32,115,111,109,101,32,115,116,121,108,101,115,\n 32,119,105,108,108,32,97,103,101,32,101,120,99,101,112,116,\n 105,111,110,97,108,108,121,44,32,109,117,99,104,32,108,105,\n 107,101,32,97,32,102,105,110,101,32,119,105,110,101,46,32,74,\n 117,115,116,32,97,115,32,116,104,101,32,115,116,121,108,101,\n 115,32,111,114,105,103,105,110,97,116,101,32,105,110,32,66,\n 101,108,103,105,117,109,44,32,115,111,32,100,111,101,115,32,\n 116,104,101,32,112,97,99,107,97,103,101,32,105,116,115,101,\n 108,102,46,32,84,111,32,105,110,115,117,114,101,32,97,117,116,\n 104,101,110,116,105,99,105,116,121,44,32,65,108,108,97,103,97,\n 115,104,32,105,109,112,111,114,116,115,32,116,104,101,32,98,\n 111,116,116,108,101,115,32,97,110,100,32,99,111,114,107,115,\n 32,100,105,114,101,99,116,108,121,32,102,114,111,109,32,116,\n 104,101,32,115,97,109,101,32,99,111,117,110,116,114,121,32,\n 116,104,97,116,32,100,101,115,105,103,110,101,100,32,116,104,\n 101,32,116,101,99,104,110,105,113,117,101,115,46,32,84,104,\n 105,115,32,101,110,97,98,108,101,115,32,116,104,101,32,98,101,\n 101,114,115,32,116,111,32,114,101,97,99,104,32,99,97,114,98,\n 111,110,97,116,105,111,110,32,108,101,118,101,108,115,32,115,\n 105,109,105,108,97,114,32,116,111,32,99,104,97,109,112,97,103,\n 110,101,32,119,104,105,108,101,32,97,108,108,111,119,105,110,\n 103,32,116,104,101,32,99,111,114,107,115,32,116,111,32,112,\n 111,112,32,99,104,97,114,97,99,116,101,114,105,115,116,105,99,\n 97,108,108,121,32,117,112,111,110,32,115,101,114,118,105,110,\n 103,46,32,84,111,100,97,121,44,32,65,108,108,97,103,97,115,\n 104,32,115,116,105,108,108,32,114,101,109,97,105,110,115,32,\n 111,110,101,32,111,102,32,118,101,114,121,32,102,101,119,32,\n 98,114,101,119,101,114,105,101,115,32,105,110,32,78,111,114,\n 116,104,32,65,109,101,114,105,99,97,32,117,115,105,110,103,32,\n 116,104,105,115,32,100,105,115,116,105,110,99,116,105,118,101,\n 32,112,97,99,107,97,103,101,46,32,70,114,111,109,32,116,104,\n 101,32,118,101,114,121,32,98,101,103,105,110,110,105,110,103,\n 44,32,65,108,108,97,103,97,115,104,32,104,97,115,32,115,116,\n 114,105,118,101,100,32,116,111,32,112,114,111,100,117,99,101,\n 32,116,104,101,32,102,105,110,101,115,116,32,66,101,108,103,\n 105,97,110,45,115,116,121,108,101,32,97,110,100,32,101,120,\n 112,101,114,105,109,101,110,116,97,108,32,97,108,101,115,32,\n 116,104,105,115,32,115,105,100,101,32,111,102,32,116,104,101,\n 32,65,116,108,97,110,116,105,99,46,32,73,116,32,98,101,103,97,\n 110,32,97,115,32,78,101,119,32,69,110,103,108,97,110,100,39,\n 115,32,111,114,105,103,105,110,97,108,32,66,101,108,103,105,\n 97,110,45,83,116,121,108,101,32,98,114,101,119,101,114,121,32,\n 97,110,100,32,104,97,115,32,103,114,111,119,110,32,105,110,\n 116,111,32,111,110,101,32,111,102,32,116,104,101,32,105,110,\n 100,117,115,116,114,121,39,115,32,109,111,115,116,32,100,105,\n 115,116,105,110,103,117,105,115,104,101,100,32,97,110,100,32,\n 119,101,108,108,45,114,101,115,112,101,99,116,101,100,32,98,\n 114,97,110,100,115,46,32,70,111,108,108,111,119,105,110,103,\n 32,116,104,101,32,116,105,109,101,45,116,101,115,116,101,100,\n 32,98,114,101,119,105,110,103,32,116,114,97,100,105,116,105,\n 111,110,115,32,111,102,32,97,110,99,105,101,110,116,32,66,101,\n 108,103,105,117,109,44,32,65,108,108,97,103,97,115,104,32,110,\n 111,119,32,112,114,111,100,117,99,101,115,32,97,32,98,114,111,\n 97,100,45,114,97,110,103,105,110,103,32,112,111,114,116,102,\n 111,108,105,111,32,111,102,32,97,114,116,105,115,97,110,97,\n 108,32,98,101,101,114,115,32,119,105,116,104,32,117,110,99,\n 111,109,112,114,111,109,105,115,105,110,103,32,113,117,97,108,\n 105,116,121,46,34,93,98,114,101,119,101,114,121,95,65,108,108,\n 97,103,97,115,104,95,66,114,101,119,105,110,103>>}

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