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https://issues.apache.org/jira/browse/KAFKA-12323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam Bellemare updated KAFKA-12323:
-----------------------------------
    Description: 
Upgraded a kafka streams application from 2.6.0 to 2.7.0. Noticed that the 
events being produced had a "CreatedAt" timestamp = 0, causing downstream 
failures as we depend on those timestamps. Reverting back to 2.6.0/2.6.1 fixed 
this issue. This was the only change to the Kafka Streams application.

Consuming the event stream produced by 2.6.0 results in events that, when 
consumed using the `kafka-avro-console-consumer` and `--property 
print.timestamp=true` result in events prepended with the event times, such as:
{code:java}
CreateTime:1613072202271 <key> <value>
CreateTime:1613072203412 <key> <value>
CreateTime:1613072205431 <key> <value>
{code}
etc.

However, when those events are produced by the Kafka Streams app using 2.7.0, 
we get:
{code:java}
CreateTime:0 <key> <value>
CreateTime:0 <key> <value>
CreateTime:0 <key> <value> 
{code}
I don't know if these is a default value somewhere that changed, but this is 
actually a blocker for our use-cases as we now need to circumnavigate this 
limitation (or roll back to 2.6.1, though there are other issues we must deal 
with then). I am not sure which unit tests in the code base to look at to 
validate this, but I wanted to log this bug now in case someone else has 
already seen this or an open one exists (I didn't see one though).

  was:
Upgraded a kafka streams application from 2.6.0 to 2.7.0. Noticed that the 
events being produced had a "CreatedAt" timestamp = 0, causing downstream 
failures as we depend on those timestamps. Reverting back to 2.6.0/2.6.1 fixed 
this issue. This was the only change to the Kafka Streams application.


Consuming the event stream produced by 2.6.0 results in events that, when 
consumed using the `kafka-avro-console-consumer` and `--property 
print.timestamp=true` result in events prepended with the event times, such as:
```
CreateTime:1613072202271 <key> <value>
CreateTime:1613072203412 <key> <value>
CreateTime:1613072205431 <key> <value>
```

etc.

However, when those events are produced by the Kafka Streams app using 2.7.0, 
we get:

```
CreateTime:0 <key> <value>
CreateTime:0 <key> <value>
CreateTime:0 <key> <value>
```

I don't know if these is a default value somewhere that changed, but this is 
actually a blocker for our use-cases as we now need to circumnavigate this 
limitation (or roll back to 2.6.1, though there are other issues we must deal 
with then). I am not sure which unit tests in the code base to look at to 
validate this, but I wanted to log this bug now in case someone else has 
already seen this or an open one exists (I didn't see one though).


> Record timestamps not populated in event
> ----------------------------------------
>
>                 Key: KAFKA-12323
>                 URL: https://issues.apache.org/jira/browse/KAFKA-12323
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Adam Bellemare
>            Priority: Blocker
>
> Upgraded a kafka streams application from 2.6.0 to 2.7.0. Noticed that the 
> events being produced had a "CreatedAt" timestamp = 0, causing downstream 
> failures as we depend on those timestamps. Reverting back to 2.6.0/2.6.1 
> fixed this issue. This was the only change to the Kafka Streams application.
> Consuming the event stream produced by 2.6.0 results in events that, when 
> consumed using the `kafka-avro-console-consumer` and `--property 
> print.timestamp=true` result in events prepended with the event times, such 
> as:
> {code:java}
> CreateTime:1613072202271 <key> <value>
> CreateTime:1613072203412 <key> <value>
> CreateTime:1613072205431 <key> <value>
> {code}
> etc.
> However, when those events are produced by the Kafka Streams app using 2.7.0, 
> we get:
> {code:java}
> CreateTime:0 <key> <value>
> CreateTime:0 <key> <value>
> CreateTime:0 <key> <value> 
> {code}
> I don't know if these is a default value somewhere that changed, but this is 
> actually a blocker for our use-cases as we now need to circumnavigate this 
> limitation (or roll back to 2.6.1, though there are other issues we must deal 
> with then). I am not sure which unit tests in the code base to look at to 
> validate this, but I wanted to log this bug now in case someone else has 
> already seen this or an open one exists (I didn't see one though).



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