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// Test handling of clock skew and optimes across mongod instances
//
// There is no automatic fail-over in a master/slave deployment, so if the master goes down, no new
// master will be elected. Therefore if the master is using an ephemeral storage engine, it cannot
// be restarted without losing all data. This test expects that restarting the master will maintain
// the node's data, so cannot be run with ephemeral storage engines.
// @tags: [requires_persistence]
var baseName = "jstests_repl_master1test";
oplog = function() {
return m.getDB( "local" ).oplog.$main;
};
lastop = function() {
return oplog().find().sort( {$natural:-1} ).next();
};
am = function() {
return m.getDB( baseName ).a;
};
rt = new ReplTest( baseName );
m = rt.start( true );
am().save( {} );
assert.eq( "i", lastop().op );
op = lastop();
printjson( op );
op.ts.t = op.ts.t + 600000; // 10 minutes
assert.commandWorked(m.getDB( "local" ).runCommand( {godinsert:"oplog.$main", obj:op} ));
rt.stop( true );
m = rt.start( true, null, true );
assert.eq( op.ts.t, lastop().ts.t );
am().save( {} );
assert.eq( op.ts.t, lastop().ts.t );
assert.eq( op.ts.i + 1, lastop().ts.i );
op = lastop();
printjson( op );
op.ts.i = Math.pow(2,31)-1;
printjson( op );
assert.commandWorked(m.getDB( "local" ).runCommand( {godinsert:"oplog.$main", obj:op} ));
rt.stop( true );
m = rt.start( true, null, true );
assert.eq( op.ts.i, lastop().ts.i );
assert.throws(function() {
am().save( {} ); // triggers fassert because ofclock skew
});
assert.neq(0, rt.stop( true )); // fasserted
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