InProcess EventHub triggered Function App Not Updating Offset value while Checkpointing

[sujjitt]

InProcess EventHub triggered Function App Not Updating Offset value while Checkpointing.

Our function app is triggering ok and we are able to process the message. After processing the message , we see the function app completed successfully. But when we check the checkpoint details, we see containers created for each partitions, sequence numbers updated accurately, But the offset value is null. As part of the Event Triggered function app we were of the impression. There is no need to handle checkpointing through custom code. Please advice what we are missing.

Repro steps

Provide the steps required to reproduce the problem

1. send a message to the Eventhub.

2. let the function app subscribe the message and post it into another Eventhub .

Expected behavior

We expect the check pointing process to update the offset values. We only see updates of the sequence number and we see all the ownership values updated accurately

We Expect the Offset values under each partition to be updated to an appropriate value and not NULL

Actual behavior

Offset values under each partition container is NULL. all the other attributes seems ok.
We see all ownership vales ok. containers are created accurately. This behavior will cause the function app to read from start when we restart or deploy new code. which is not acceptable.

Known workarounds

Handle Checkpoints using custom code. and this works.

Related information

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• Package version
• Links to source