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// Test that the clock skew of the distributed lock disallows getting locks for moving and splitting.
s = new ShardingTest( "moveDistLock", 3, 0, undefined, { sync : true } );
s._connections[0].getDB( "admin" ).runCommand( { _skewClockCommand : 1, skew : 15000 } )
s._connections[1].getDB( "admin" ).runCommand( { _skewClockCommand : 1, skew : -16000 } )
// We need to start another mongos after skewing the clock, since the first mongos will have already
// tested the config servers (via the balancer) before we manually skewed them
otherMongos = startMongos( { port : 30020, v : 0, configdb : s._configDB } );
// Initialize DB data
initDB = function(name) {
var db = s.getDB( name );
var c = db.foo;
c.save( { a : 1 } );
c.save( { a : 2 } );
c.save( { a : 3 } );
assert( 3, c.count() );
return s.getServer( name );
}
from = initDB( "test1" );
to = s.getAnother( from );
s.printShardingStatus();
// Make sure we can't move when our clock skew is so high
result = otherMongos.getDB( "admin" ).runCommand( { moveprimary : "test1", to : to.name } );
s.printShardingStatus();
assert.eq( result.ok, 0, "Move command should not have succeeded!" )
// Enable sharding on DB and collection
result = otherMongos.getDB("admin").runCommand( { enablesharding : "test1" } );
result = otherMongos.getDB("test1").foo.ensureIndex( { a : 1 } );
result = otherMongos.getDB("admin").runCommand( { shardcollection : "test1.foo", key : { a : 1 } } );
print(" Collection Sharded! ")
// Make sure we can't split when our clock skew is so high
result = otherMongos.getDB( "admin" ).runCommand( { split : "test1.foo", find : { a : 2 } } );
assert.eq( result.ok, 0, "Split command should not have succeeded!")
// Adjust clock back in bounds
s._connections[1].getDB( "admin" ).runCommand( { _skewClockCommand : 1, skew : 0 } )
print(" Clock adjusted back to in-bounds. ");
// Make sure we can now split
result = otherMongos.getDB( "admin" ).runCommand( { split : "test1.foo", find : { a : 2 } } );
s.printShardingStatus();
assert.eq( result.ok, 1, "Split command should have succeeded!")
// Make sure we can now move
result = otherMongos.getDB( "admin" ).runCommand( { moveprimary : "test1", to : to.name } );
s.printShardingStatus();
assert.eq( result.ok, 1, "Move command should have succeeded!" )
// Make sure we can now move again (getting the lock twice)
result = otherMongos.getDB( "admin" ).runCommand( { moveprimary : "test1", to : from.name } );
s.printShardingStatus();
assert.eq( result.ok, 1, "Move command should have succeeded again!" )
s.stop();
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