I was doing a stress test of running an endpoint multiple times in a short period of time. The endpoint updates the same entity in a transaction. Eventually, I got this error:

com.google.cloud.datastore.DatastoreException: Failed retrying datastore 200 times

I tried it with both transact() and transactNew() in objectify and got this error. The objectify comments specifically say that transactNew() retries the transaction Integer.MAX_VALUE times so I don't understand why I got this error at only 200 retries.

Does anyone know if this error is a objectify error or a datastore error?

Is there a datastore transactional limit of 200? Or is something else going on like app engine not auto-scaling right?

CodePudding user response：

The default limit in Objectify is 200