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  1. Core Server
  2. SERVER-40999

snapshot_read_kill_operations.js should accept CursorNotFound on currentOp

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    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 4.1.11
    • Affects Version/s: None
    • Component/s: None
    • None
    • Fully Compatible
    • ALL
    • Hide

      This occurs is easy to reproduce on master with the following patch:

      diff --git a/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js b/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js
index 6a68f7d93a..e4368296bf 100644
--- a/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js
+++ b/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js
@@ -148,8 +148,8 @@ var $config = (function() {
     }
 
     return {
-        threadCount: 5,
-        iterations: 10,
+        threadCount: 50,
+        iterations: 20,
         startState: 'init',
         states: states,
         transitions: transitions,
diff --git a/src/mongo/s/query/cluster_aggregate.cpp b/src/mongo/s/query/cluster_aggregate.cpp
index 2cbb292adc..350dccd2b7 100644
--- a/src/mongo/s/query/cluster_aggregate.cpp
+++ b/src/mongo/s/query/cluster_aggregate.cpp
@@ -827,6 +827,7 @@ Status ClusterAggregate::runAggregate(OperationContext* opCtx,
     // If not, split the pipeline as necessary and dispatch to the relevant shards.
     auto shardDispatchResults = sharded_agg_helpers::dispatchShardPipeline(
         expCtx, namespaces.executionNss, request, litePipe, std::move(pipeline), collationObj);
+    sleepmillis(100);
 
     // If the operation is an explain, then we verify that it succeeded on all targeted shards,
     // write the results to the output builder, and return immediately.
      Show
      This occurs is easy to reproduce on master with the following patch: diff --git a/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js b/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js index 6a68f7d93a..e4368296bf 100644 --- a/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js +++ b/jstests/concurrency/fsm_workloads/snapshot_read_kill_operations.js @@ -148,8 +148,8 @@ var $config = (function() { } return { - threadCount: 5, - iterations: 10, + threadCount: 50, + iterations: 20, startState: 'init' , states: states, transitions: transitions, diff --git a/src/mongo/s/query/cluster_aggregate.cpp b/src/mongo/s/query/cluster_aggregate.cpp index 2cbb292adc..350dccd2b7 100644 --- a/src/mongo/s/query/cluster_aggregate.cpp +++ b/src/mongo/s/query/cluster_aggregate.cpp @@ -827,6 +827,7 @@ Status ClusterAggregate::runAggregate(OperationContext* opCtx, // If not, split the pipeline as necessary and dispatch to the relevant shards. auto shardDispatchResults = sharded_agg_helpers::dispatchShardPipeline( expCtx, namespaces.executionNss, request, litePipe, std::move(pipeline), collationObj); + sleepmillis(100); // If the operation is an explain, then we verify that it succeeded on all targeted shards, // write the results to the output builder, and return immediately.
    • 17

      The snapshot_read_kill_operations.js test executes the currentOp command concurrently with session kill. If run in a sharded fixture, it is possible for:
      1) currentOp to be executed on mongos, which requests a batchSize:0 cursor from the shards
      2) The cursor to be killed via session kill on mongod
      3) mongos to request data for the cursor and receive cursorNotFound

            Assignee:
            james.wahlin@mongodb.com James Wahlin
            Reporter:
            james.wahlin@mongodb.com James Wahlin
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              Created:
              Updated:
              Resolved: