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/*
* Tests that the 'forceSyncSourceCandidate' failpoint correctly forces a sync source.
*
* @tags: [requires_replication]
*/
(function() {
"use strict";
const failpointName = "forceSyncSourceCandidate";
const rst = new ReplSetTest({
nodes: [{}, {rsConfig: {priority: 0}}, {rsConfig: {priority: 0}}, {rsConfig: {priority: 0}}],
// Allow many initial sync attempts. Initial sync may fail if the sync source does not have
// an oplog yet because it has not conducted its own initial sync yet.
// We turn on the noop writer to encourage successful sync source selection.
nodeOptions: {setParameter: {numInitialSyncAttempts: 100, writePeriodicNoops: true}}
});
const nodes = rst.startSet();
function setFailPoint(node, syncSource) {
const dataObj = {hostAndPort: syncSource.host};
assert.commandWorked(
node.adminCommand({configureFailPoint: failpointName, mode: "alwaysOn", data: dataObj}));
}
setFailPoint(nodes[1], nodes[0]);
setFailPoint(nodes[2], nodes[1]);
setFailPoint(nodes[3], nodes[2]);
rst.initiate();
const primary = rst.getPrimary();
rst.awaitSyncSource(nodes[1], nodes[0]);
rst.awaitSyncSource(nodes[2], nodes[1]);
rst.awaitSyncSource(nodes[3], nodes[2]);
rst.stopSet();
})();
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