Thank you....  

One addition

I do not see WM info on the UI  ( Attached ) 

Is this a know issue. The same pipe on our production has the WM ( In fact never had an issue with  Watermarks not appearing ) . Am I missing something ?

On Mon, Jun 25, 2018 at 4:15 AM, Fabian Hueske <> wrote:
Hi Vishal,

1. I don't think a rolling update is possible. Flink 1.5.0 changed the process orchestration and how they communicate. IMO, the way to go is to start a Flink 1.5.0 cluster, take a savepoint on the running job, start from the savepoint on the new cluster and shut the old job down.
2. Savepoints should be compatible.
3. You can keep the slot configuration as before.
4. As I said before, mixing 1.5 and 1.4 processes does not work (or at least, it was not considered a design goal and nobody paid attention that it is possible).

Best, Fabian

2018-06-23 13:38 GMT+02:00 Vishal Santoshi <>:

Can or has any one  done  a rolling upgrade from 1.4 to 1.5 ?  I am not sure we can. It seems that JM cannot recover jobs with this exception

Caused by: org.apache.flink.runtime.jobgraph.tasks.CheckpointCoordinatorConfiguration; local class incompatible: stream classdesc serialVersionUID = -647384516034982626, local class serialVersionUID = 2

Does SP on 1.4, resume on 1.5 ( pretty basic but no harm asking ) ?

3. The taskmanager.numberOfTaskSlots: What would be the desired setting in a stand alone ( non mesos/yarn ) cluster ?

4. I suspend all jobs and establish 1.5 on the JM ( the TMs are still running with 1.4 ) . JM refuse to start  with 

Jun 23 07:34:23 docker[3395]: 2018-06-23 11:34:23 ERROR JobManager:116 - Failed to recover job 454cd84a519f3b50e88bcb378d8a1330.

Jun 23 07:34:23 docker[3395]: java.lang.InstantiationError: org.apache.flink.runtime.blob.BlobKey

Jun 23 07:34:23 docker[3395]: at sun.reflect.GeneratedSerializationConstructorAccessor51.newInstance(Unknown Source)

Jun 23 07:34:23 docker[3395]: at java.lang.reflect.Constructor.newInstance(

Jun 23 07:34:23 docker[3395]: at



Any feedback would be highly appreciated...