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/**
* Basic test of killop functionality.
*
* Theory of operation: Creates two operations that will take a long time, sends killop for those
* operations, and then attempts to infer that the operations died because of killop, and not for
* some other reason.
*
* NOTES:
* The long operations are count({$where: function () { while (1) ; } }). These operations do not
* terminate until the server determines that they've spent too much time in JS execution, typically
* after 30 seconds of wall clock time have passed. For these operations to take a long time, the
* counted collection must not be empty; hence an initial write to the collection is required.
*/
t = db.jstests_killop
t.drop();
t.save( {} );
/**
* This function filters for the operations that we're looking for, based on their state and
* the contents of their query object.
*/
function ops() {
p = db.currentOp().inprog;
ids = [];
for ( var i in p ) {
var o = p[ i ];
// We *can't* check for ns, b/c it's not guaranteed to be there unless the query is active, which
// it may not be in our polling cycle - particularly b/c we sleep every second in both the query and
// the assert
if ( ( o.active || o.waitingForLock ) && o.query && o.query.query && o.query.query.$where && o.query.count == "jstests_killop" ) {
ids.push( o.opid );
}
}
return ids;
}
var s1 = null;
var s2 = null;
try {
s1 = startParallelShell( "db.jstests_killop.count( { $where: function() { while( 1 ) { ; } } } )" );
s2 = startParallelShell( "db.jstests_killop.count( { $where: function() { while( 1 ) { ; } } } )" );
o = [];
assert.soon(function() { o = ops(); return o.length == 2; },
{ toString: function () { return tojson(db.currentOp().inprog); } },
10000);
db.killOp( o[ 0 ] );
db.killOp( o[ 1 ] );
start = new Date();
}
finally {
if (s1) s1();
if (s2) s2();
}
// don't want to pass if timeout killed the js function NOTE: This test will sometimes pass when the
// JS engine did actually kill the operation, because the JS timeout is 30 seconds of wall clock
// time from the moment the operation starts, but "start" measures from shortly after the test sends
// the killop message to the server.
assert( ( new Date() ) - start < 30000 );
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