Multi-threads for calling Amplify.Storage.uploadFile method without network connected

^{Originally posted by **waertf** February 23, 2023}
I have the condition that I need to call Amplify.Storage.uploadFile within the following worker class:
`public class UploadImageWork extends ListenableWorker{...}`
if I run the upload method in Multi-threads
`
void upload()
{
WorkRequest UploadImageWifiOnlyWorkWorkRequest =
new OneTimeWorkRequest.Builder(UploadImageWork.class).build();
WorkManager
.getInstance(context)
.enqueue(UploadImageWifiOnlyWorkWorkRequest);
}
`
ref [link](https://stackoverflow.com/questions/61972975/workmanager-does-not-run-more-than-20-jobs)
for amplify v2.2.2
1. I saw that the amplify use workmanager to schedule the jobs. If the amplify enqueue jobs are over 20 or over 50 number. What will happen?
2. as for the upper code, is there a side effect of using enqueue nest work in the main process?
3. what is the max not be done job number that can be held by amplify?

for amplify v1.38.0

1. as for the upper code, is there a side effect of using enqueue for many works?
2. what is the max not be done job number that can be held by amplify?

Thanks.