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/**
* Tests that a migration will continuously retry sync source selection when there are no available
* donor hosts. Also checks that a donor host is considered an uneligible sync source when it has a
* majority OpTime earlier than the recipient's stored 'startApplyingDonorOpTime'.
*
* Tests that if the stale donor host advances its majority OpTime to 'startApplyingDonorOpTime'
* or later, the recipient will successfully choose that donor as sync source and resume the
* migration.
*
* @tags: [
* incompatible_with_eft,
* incompatible_with_macos,
* incompatible_with_shard_merge,
* incompatible_with_windows_tls,
* requires_majority_read_concern,
* requires_persistence,
* serverless,
* ]
*/
(function() {
"use strict";
load("jstests/replsets/libs/tenant_migration_recipient_sync_source.js");
// After this setUp() call, we should have a migration with 'secondary' read preference. The
// recipient should be continuously retrying sync source selection, unable to choose
// 'delayedSecondary' because it is too stale and 'donorSecondary' because it is down.
const {
tenantMigrationTest,
migrationOpts,
donorSecondary,
delayedSecondary,
hangAfterCreatingConnections
} = setUpMigrationSyncSourceTest();
if (!tenantMigrationTest) {
// Feature flag was not enabled.
return;
}
jsTestLog("Restarting replication on 'delayedSecondary'");
restartServerReplication(delayedSecondary);
// The recipient should eventually be able to connect to the lagged secondary, after the secondary
// has caught up and the exclude timeout has expired.
hangAfterCreatingConnections.wait();
const recipientPrimary = tenantMigrationTest.getRecipientPrimary();
const res = recipientPrimary.adminCommand({currentOp: true, desc: "tenant recipient migration"});
const currOp = res.inprog[0];
assert.eq(delayedSecondary.host,
currOp.donorSyncSource,
`the recipient should only be able to choose 'delayedSecondary' as sync source`);
hangAfterCreatingConnections.off();
TenantMigrationTest.assertCommitted(tenantMigrationTest.waitForMigrationToComplete(migrationOpts));
assert.commandWorked(tenantMigrationTest.forgetMigration(migrationOpts.migrationIdString));
// Remove 'donorSecondary' so that the test can complete properly.
const donorRst = tenantMigrationTest.getDonorRst();
donorRst.remove(donorSecondary);
donorRst.stopSet();
tenantMigrationTest.stop();
})();
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