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// Drop a collection while a map/reduce job is running against it. SERVER-6757
t = db.jstests_mr_drop;
t.drop();
Random.setRandomSeed();
// Set sleep times for different stages of the map/reduce job. The collection drop will occur
// during different stages of map/reduce depending on these sleep values.
mapSleep = Random.randInt( 4 );
reduceSleep = Random.randInt( 4 );
finalizeSleep = Random.randInt( 4 );
// Insert some documents.
for( i = 0; i < 1000; ++i ) {
t.save( { key:parseInt( i / 2 ),
mapSleep:mapSleep,
reduceSleep:reduceSleep,
finalizeSleep:finalizeSleep } );
}
db.getLastError();
// Schedule a collection drop one second in the future.
s = startParallelShell( "sleep( 1000 ); db.jstests_mr_drop.drop();" );
// Run the map/reduce job. Check for command failure internally. The job succeeds even if the
// source collection is dropped in progress.
t.mapReduce( function() { sleep( this.mapSleep ); emit( this.key, this ); },
function( key, vals ) { sleep( vals[ 0 ].reduceSleep ); return vals[ 0 ]; },
{ finalize:function( key, value ) { sleep( value.finalizeSleep ); return value; },
out:'jstests_mr_drop_out' }
);
// Wait for the parallel shell to finish.
s();
// Ensure the server is still alive. Under SERVER-6757 the server can crash.
assert( !db.getLastError() );
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