Hi,
Thank you for your reply.
I want to read the previous snapshot (if needed) at the time of operation.
In [1], there is a portion:
DataSet<Integer> listState = savepoint.readListState<>(
"my-uid",
"list-state",
Types.INT);
here, will the function savepoint.readliststate<> () work to read the
previous snapshot? If it is, then is the filename of a savepoint file
similar to my-uid?
[1]
https://ci.apache.org/projects/flink/flink-docs-stable/dev/libs/state_processor_api.html
Thank you
On Fri, Apr 23, 2021 at 1:11 AM Matthias Pohl <matth...@ververica.com>
wrote:
> What is it you're trying to achieve in general? The JavaDoc of
> MetadataV2V3SerializerBase provides a description on the format of the
> file. Theoretically, you could come up with custom code using the Flink
> sources to parse the content of the file. But maybe, there's another way to
> accomplish what you're trying to do.
>
> Matthias
>
> [1]
> https://github.com/apache/flink/blob/adaaed426c2e637b8e5ffa3f0d051326038d30aa/flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/metadata/MetadataV2V3SerializerBase.java#L83
>
> On Thu, Apr 22, 2021 at 7:53 PM Abdullah bin Omar <
> abdullahbinoma...@gmail.com> wrote:
>
>> Hi,
>>
>> I have a savepoint or checkpointed file from my task. However, the file
>> is binary. I want to see what the file contains.
>>
>> How is it possible to see what information the file has (or how it is
>> possible to make it human readable?)
>>
>> Thank you
>>
>> On Thu, Apr 22, 2021 at 10:19 AM Matthias Pohl <matth...@ververica.com>
>> wrote:
>>
>>> Hi Abdullah,
>>> the metadata file contains handles to the operator states of the
>>> checkpoint [1]. You might want to have a look into the State Processor API
>>> [2].
>>>
>>> Best,
>>> Matthias
>>>
>>> [1]
>>> https://github.com/apache/flink/blob/adaaed426c2e637b8e5ffa3f0d051326038d30aa/flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/metadata/MetadataV2V3SerializerBase.java#L83
>>> [2]
>>> https://ci.apache.org/projects/flink/flink-docs-stable/dev/libs/state_processor_api.html
>>>
>>> On Thu, Apr 22, 2021 at 4:57 PM Abdullah bin Omar <
>>> abdullahbinoma...@gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> (1) what 's the snapshot metadata file (binary) contains ? is it
>>>> possible to read the snapshot metadata file by using Flink Deserialization?
>>>>
>>>> (2) is there any function that can be used to see the previous
>>>> states on time of operation?
>>>>
>>>> Thank you
>>>>
>>>
>
