luocooong commented on a change in pull request #2442:
URL: https://github.com/apache/drill/pull/2442#discussion_r795119827
##########
File path:
contrib/storage-mongo/src/main/java/org/apache/drill/exec/store/mongo/MongoRecordReader.java
##########
@@ -198,7 +198,11 @@ public int next() {
if (!fields.isEmpty()) {
operations.add(Aggregates.project(fields));
}
- projection = collection.aggregate(operations);
+ if (plugin.getConfig().allowDiskUse()) {
+ projection = collection.aggregate(operations).allowDiskUse(true);
Review comment:
```suggestion
projection = collection.aggregate(operations).allowDiskUse(true);
```
##########
File path:
contrib/storage-mongo/src/main/resources/bootstrap-storage-plugins.json
##########
@@ -3,6 +3,7 @@
"mongo" : {
"type":"mongo",
"connection":"mongodb://localhost:27017/",
+ "allowDiskUse": false,
Review comment:
Is it possible that the old stored plugin objects were not able to
deserialize from the ZK (based on the distributed ZK)?
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