I am forwarding Stefan’s reply:

Hi,

this problem can be caused by https://issues.apache.org/jira/browse/FLINK-6044. 
It is fixed in 1.2.1 and 1.3.

Best,
Stefan

>> Am 26.05.2017 um 16:16 schrieb Kostas Kloudas <k.klou...@data-artisans.com>:
>> 
>> Hi,
>> 
>> Could you provide some info on when is this error happening?
>> 
>> From what I see you are using the heap or fs state backend and you are
>> failing to read the state back when restoring from a failure. The failure 
>> can 
>> be unrelated to this, but it could be useful if you could check the task 
>> manager
>> logs to see why the failure happens and if there are any exceptions when 
>> checkpointing 
>> for example.
>> 
>> Also could you share the code for your objects (what you are serializing)?
>> Just to cover some cases.
>> 
>> I aslo include Stefan in this.
>> 
>> Kostas 
>> 
>>> On May 26, 2017, at 1:06 PM, rhashmi <rizhas...@hotmail.com> wrote:
>>> 
>>> Which Flink version you are using?  1.2 
>>> What is your job doing (e.g. operators that you are using)? ProcessFunction
>>> to determine if event is late change event time to current & then window
>>> Which operator throws this exception? i will have to dig it further
>>> Which state-backend are you using? mysql. 
>>> 
>>> 
>>> 
>>> --
>>> View this message in context: 
>>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/invalid-type-code-00-tp13326p13332.html
>>> Sent from the Apache Flink User Mailing List archive. mailing list archive 
>>> at Nabble.com.
>> 
> 

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