ECS object count mismatch

Using Dell ECS S3 bucket for archival, where application is writing at a rate of 200 TPS.

In the application we are checking whether the object is persisted (S3Client.getObjectMetadata) on the bucket after writing the object (s3Client.putObject), just to be sure that we don’t lose any data.

But, when we take the final count on the ECS S3 bucket we observe a bit of difference with object count obtained on ECS is always less than our application internal instrumentation/metering count. There are no errors logged and have received successful response for all the objects write operation and get operation.

Just wanted to understand why the count is less in ECS when all the writes are successful? 

Note : Will update the exact command being used to capture count soon