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/*
* Verify that killing an instance of mongod while it is in a long running computation or infinite
* loop still leads to clean shutdown, and that said shutdown is prompt.
*
* For our purposes, "prompt" is defined as "before stopMongod() decides to send a SIGKILL" and also
* "before mongod starts executing the next pending operation after the currently executing one."
*
* This is also a regression test for SERVER-1818. By queuing up a collection drop behind an
* infinitely looping operation, we ensure that killall interrupts the drop command (drop is
* normally a short lived operation and is otherwise difficult to kill deterministically). The
* subsequent drop() on restart would historically assert if the data integrity issue caused by
* SERVER-1818 occured.
*/
port = allocatePorts( 1 )[ 0 ]
var baseName = "jstests_disk_killall";
var dbpath = MongoRunner.dataPath + baseName;
var mongod = startMongod( "--port", port, "--dbpath", dbpath, "--nohttpinterface" );
var db = mongod.getDB( "test" );
var collection = db.getCollection( baseName );
collection.save( {} );
assert( ! db.getLastError() );
s1 = startParallelShell( "db." + baseName + ".count( { $where: function() { while( 1 ) { ; } } } )", port );
// HACK(schwerin): startParallelShell's return value should allow you to block until the command has
// started, for some definition of started.
sleep( 1000 );
s2 = startParallelShell( "db." + baseName + ".drop()", port );
sleep( 1000 ); // HACK(schwerin): See above.
/**
* 0 == mongod's exit code on Windows, or when it receives TERM, HUP or INT signals. On UNIX
* variants, stopMongod sends a TERM signal to mongod, then waits for mongod to stop. If mongod
* doesn't stop in a reasonable amount of time, stopMongod sends a KILL signal, in which case mongod
* will not exit cleanly. We're checking in this assert that mongod will stop quickly even while
* evaling an infinite loop in server side js.
*
* NOTE: 14 is sometimes returned instead due to SERVER-2652.
*/
var exitCode = stopMongod( port );
assert( exitCode in [0, 14], "got unexpected exitCode: " + exitCode );
s1();
s2();
mongod = startMongoProgram( "mongod", "--port", port, "--dbpath", dbpath );
db = mongod.getDB( "test" );
collection = db.getCollection( baseName );
assert( collection.stats().ok );
assert( collection.drop() );
stopMongod( port );
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