SERVER-42866 Trigger a logical session cache refresh on all shards in the ShardedCluster test fixture before running test

(cherry picked from commit 108425fdd063a0c7dae50b2d48d3dadea35a0557)

2 files changed, 14 insertions, 0 deletions

diff --git a/buildscripts/resmokelib/testing/fixtures/shardedcluster.py b/buildscripts/resmokelib/testing/fixtures/shardedcluster.py
index b3b744095ef..f2a6814b171 100644
--- a/buildscripts/resmokelib/testing/fixtures/shardedcluster.py
+++ b/buildscripts/resmokelib/testing/fixtures/shardedcluster.py
@@ -140,6 +140,11 @@ class ShardedClusterFixture(interface.Fixture):  # pylint: disable=too-many-inst
             primary = self.configsvr.get_primary().mongo_client()
             primary.admin.command({"refreshLogicalSessionCacheNow": 1})
 
+        for shard in self.shards:
+            primary = (shard.mongo_client() if self.num_rs_nodes_per_shard is None else
+                       shard.get_primary().mongo_client())
+            primary.admin.command({"refreshLogicalSessionCacheNow": 1})
+
     def _auth_to_db(self, client):
         """Authenticate client for the 'authenticationDatabase'."""
         if self.auth_options is not None:
diff --git a/src/mongo/shell/shardingtest.js b/src/mongo/shell/shardingtest.js
index 6008c769202..8f33e5445ae 100644
--- a/src/mongo/shell/shardingtest.js
+++ b/src/mongo/shell/shardingtest.js
@@ -1619,6 +1619,15 @@ var ShardingTest = function(params) {
              lastStableBinVersion,
              MongoRunner.getBinVersionFor(otherParams.configOptions.binVersion)))) {
         this.configRS.getPrimary().getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1});
+
+        for (let i = 0; i < numShards; i++) {
+            if (otherParams.rs || otherParams["rs" + i] || startShardsAsRS) {
+                const rs = this._rs[i].test;
+                rs.getPrimary().getDB("admin").runCommand({_flushRoutingTableCacheUpdatesCmd: 1});
+            } else {
+                this["shard" + i].getDB("admin").runCommand({_flushRoutingTableCacheUpdatesCmd: 1});
+            }
+        }
     }
 };